We gratefully acknowledge support fromthe Simons Foundation and member institutions.
All fields

Search...

SearchHelp | Advanced Search
Login

Showing 1–98 of 98 results

Search v0.5.6 released 2020-02-24

Query: order: -announced_date_first; size: 200; date_range: from 2024-08-16 to 2024-08-22; classification:
Physics (grp_physics)::Astrophysics (astro-ph); include_cross_list: True; terms: AND all=astro-ph.EP; OR all=astroph.GA
Refine query

New search

200

results per page. Sort results by Announcement date (newest first)

1. arXiv:2408.11776 [pdf, other]Go

astro-ph.GA

Chemical models of interstellar glycine and adenine precursor aminoacetonitrile (NH2CH2CN)
Authors: Xia Zhang, Donghui Quan, Xiaohu Li, Jarken Esimbek, Fangfang Li, Yan Zhou, Dalei Li
Abstract: Aminoacetonitrile (AAN), also known as glycinenitrile, has been suggested as a possible precursor of glycine andadenine in the interstellar medium. Here we present the chemical modeling of AAN and its isomers in hot cores using thethree-phase chemical model NAUTILUS with the addition of over 300 chemical reactions of the three AAN isomers and related
species. Our models predicted a peak gas phas… ▽ More
Submitted 21 August, 2024; originally announced August 2024.
Comments: 15 pages,8 figures,5 tables,accepted for publication in MNRAS

2. arXiv:2408.11732 [pdf, other]

astro-ph.EP

astro-ph.SR

K2-399 b is not a planet. The Saturn that wandered through the Neptune desert is actually ahierarchical eclipsing binary
Authors: J. Lillo-Box, D. W. Latham, K. A. Collins, D. J. Armstrong, D. Gandolfi, E. L. N. Jensen, A. Castro-González, O. BalsalobreRuza, B. Montesinos, S. G. Sousa, J. Aceituno, R. P. Schwarz, N. Narita, A. Fukui, J. Cabrera, A. Hadjigeorghiou, M. Kuzuhara, T.
Hirano, M. Fridlund, A. P. Hatzes, O. Barragán, N. M. Batalha
Abstract: The transit technique has been very efficient in detecting planet candidate signals over the past decades. The socalled statistical validation approach has become a popular way of verifying a candidate's planetary nature. However, theincomplete consideration of false positive scenarios and data quality can lead to the misinterpretation of the results. In thiswork we revise the planetary status… ▽ More
Submitted 21 August, 2024; originally announced August 2024.
Comments: 14 pages, 12 figures, 5 tables, Accepted for publication in A&A Letters

3. arXiv:2408.11713 [pdf, other]

astro-ph.SR

astro-ph.GA

Properties of intermediate- to high-mass stars in the young cluster M17 -- Characterizing the (pre)zero-age main sequence
Authors: Frank Backs, S. A. Brands, M. C. Ramírez-Tannus, A. R. Derkink, A. de Koter, J. Poorta, J. Puls, Lex Kaper
Abstract: The outcome of the formation of massive stars is an important anchor point in their evolution. It provides insight into
the physics of the assembly process, and sets the conditions for stellar evolution. We characterize a population of 18 highly
reddened O4.5 to B9 stars in the very young massive star-forming region M17. Their properties allow us to identify theempirical location of the ZAMS, and… ▽ More
Submitted 21 August, 2024; originally announced August 2024.
Comments: 37 pages, 31 figures, accepted for publication in A&A

4. arXiv:2408.11692 [pdf, other]

astro-ph.EP

astro-ph.SR

A JWST MIRI MRS View of the η Tel Debris Disk and its Brown Dwarf Companion
Authors: Yiwei Chai, Christine H. Chen, Kadin Worthen, Alexis Li, Antranik Sefilian, William Balmer, Dean C. Hines, David R. Law,
B. A. Sargent, Mark Wyatt, Cicero X. Lu, Marshall D. Perrin, Isabel Rebollido, Emily Rickman, G. C. Sloan
Abstract: We report JWST MIRI MRS observations of the β Pictoris moving group member, η Telescopii (η Tel) A and its browndwarf binary companion, η Tel B. Following PSF subtraction, we recover the spatially resolved flux from the debris disk aroundη Tel A, along with the position of the companion exterior to the disk. We present a new 5-26 µ m epoch of spectroscopy for the
disk, in which we dis… ▽ More
Submitted 21 August, 2024; originally announced August 2024.
Comments: 27 pages, 19 figures, accepted for publication in ApJ

5. arXiv:2408.11613 [pdf, other]

astro-ph.GA

astro-ph.EP

astro-ph.SR

Survey of Complex Organic Molecules in Starless and Prestellar Cores in the Perseus Molecular
Cloud
Authors: Samantha Scibelli, Yancy Shirley, Andrés Megías, Izaskun Jiménez-Serra
Abstract: Cold (∼ 10 K) and dense (∼ 105 cm−3 ) cores of gas and dust within molecular clouds, known as starless anddynamically evolved prestellar cores, are the birthplaces of low-mass (M ≤ few M⊙ ) stars. As detections of interstellar
complex organic molecules, or COMs, in starless cores has increased, abundance comparisons suggest that some COMs might
be seeded early in the… ▽ More
Submitted 21 August, 2024; originally announced August 2024.
Comments: Accepted for publication in MNRAS. 25-page main text (w/ 18 figures) and 25-page appendix (w/ 7 figures) for a total of 50 pages

6. arXiv:2408.11548 [pdf]10.1093/mnras/stae1854doi

astro-ph.GA

CHIMPS2: 13 CO J = 3 → 2 emission in the Central Molecular Zone
Authors: S. M. King, T. J. T. Moore, J. D. Henshaw, S. N. Longmore, D. J. Eden, A. J. Rigby, E. Rosolowsky, K. Tahani, Y. Su, A. Yiping,X. Tang, S. Ragan, T. Liu, Y. -J. Kuan, R. Rani
Abstract: We present the initial data for the (J = 3 → 2 ) transition of 13 CO obtained from the Central Molecular Zone (CMZ)
of the Milky Way as part of the CO Heterodyne Inner Milky Way Plane Survey 2 (CHIMPS2). Covering 359∘ ≤ l ≤ 1∘ and|b| ≤ 0.5∘ with an angular resolution of 19 arcsec, velocity resolution of 1 km s−1 , and rms TA∗ = 0.59 K at these resolution…
▽ MoreSubmitted 21 August, 2024; originally announced August 2024.
Comments: 13 pages, 9 figures

7. arXiv:2408.11511 [pdf, other]

astro-ph.GA

Re-evaluation of the cosmic-ray ionization rate in diffuse clouds
Authors: M. Obolentseva, A. V. Ivlev, K. Silsbee, D. A. Neufeld, P. Caselli, G. Edenhofer, N. Indriolo, T. G. Bisbas, D. Lomeli
Abstract: All current estimates of the cosmic-ray (CR) ionization rate rely on assessments of the gas density along the probed
sight lines. Until now, these have been based on observations of different tracers, with C2 being the most widely used in diffuse
molecular clouds for this purpose. However, three-dimensional dust extinction maps have recently reached sufficient accuracy
as to give an independent… ▽ More
Submitted 21 August, 2024; originally announced August 2024.
Comments: Accepted for publication in ApJ

8. arXiv:2408.11462 [pdf, ps, other]

astro-ph.CO

astro-ph.GA

Intrinsic Alignments and Spin Correlations of [OII] Emitters at z = 1.2 and z = 1.5 from HSC
Narrow-band Survey
Authors: Motonari Tonegawa, Teppei Okumura, Masao Hayashi
Abstract: Galaxies are known to be aligned toward specific directions within the large-scale structure. Such alignment signals
become important for controlling the systematics of weak lensing surveys and for constraining galaxy formation and evolution
scenarios. We measure the galaxy-ellipticity and ellipticity-ellipticity correlation functions for blue star-forming galaxies at
z = 1.19 and z = 1.47 that ar… ▽ More
Submitted 21 August, 2024; originally announced August 2024.
Comments: 16 pages, 12 figures, submitted to PASJ

9. arXiv:2408.11414 [pdf, other]

astro-ph.GA

emPDF: Inferring the Milky Way mass with data-driven distribution function in phase space
Authors: Zhaozhou Li, Jiaxin Han, Wenting Wang, Yong-Zhong Qian, Qingyang Li, Yipeng Jing, Ting S. Li
Abstract: We introduce the emPDF (Empirical Distribution Function), a novel dynamical modeling method that infers thegravitational potential from kinematic tracers with optimal statistical efficiency under the minimal assumption of steady state.
emPDF determines the best-fit potential by maximizing the similarity between instantaneous kinematics and the time-averaged
phase-space distribution function (DF),… ▽ More
Submitted 21 August, 2024; originally announced August 2024.
Comments: 18 pages, 10 figures. Submitted to MNRAS. Comments are welcome

10. arXiv:2408.11383 [pdf]astro-ph.GA

Discovered a new open cluster near the poorly studied Majaess 190
Authors: A. L. Tadross
Abstract: We present the results of a comprehensive astrophysical study of a newly discovered open cluster, dubbed Ash-1.
Using the third data release of the Gaia space mission, Gaia DR3, Ash-1 was accidentally discovered within the constellation
Sagittarius in the field of the poorly studied cluster Majaess 190. Here we present the first estimates of these two clusters'
primary astrophysical properties. Th… ▽ More
Submitted 21 August, 2024; originally announced August 2024.
Comments: 13 pages, 10 figures,

11. arXiv:2408.11377 [pdf, other]

astro-ph.GA

astro-ph.CO

astro-ph.HE

From 100 MHz to 10 GHz: Unveiling the spectral evolution of the X-shaped radio galaxy in Abell
3670
Authors: L. Bruno, M. Brienza, A. Zanichelli, M. Gitti, F. Ubertosi, K. Rajpurohit, T. Venturi, D. Dallacasa
Abstract: X-shaped radio galaxies (XRGs) are characterised by two pairs of misaligned lobes, namely the active lobes hosting
radio jets and the wings. None of the formation mechanisms proposed so far can exhaustively reproduce the diverse features
observed among XRGs. The emerging evidence is the existence of sub-populations of XRGs forming via different processes. The
brightest cluster galaxy in Abell 3670… ▽ More
Submitted 21 August, 2024; originally announced August 2024.
Comments: 23 pages (including Appendices), 14 figures. Accepted for publication in A&A

12. arXiv:2408.11321 [pdf, other]

astro-ph.EP

Phase equilibria of sub-Neptunes and super-Earths
Authors: Edward D. Young, Lars Stixrude, James G. Rogers, Hilke E. Schlichting, Sarah P. Marcum
Abstract: We investigate the consequences of non-ideal chemical interaction between silicate and overlying hydrogen-richenvelopes for rocky planets using basic tenets of phase equilibria. Based on our current understanding of the temperature andpressure conditions for complete miscibility of silicate and hydrogen, we find that the silicate-hydrogen binary solvus will
dictate the nature of atmospheres and… ▽ More
Submitted 21 August, 2024; originally announced August 2024.
Comments: 13 figures

13. arXiv:2408.11292 [pdf, other]

astro-ph.HE

astro-ph.GA

Unprecedented Central Engine "Breathing" Phenomenon in an Active Supermassive Black Hole
Authors: Shuying Zhou, Mouyuan Sun, Hai-Cheng Feng, Sha-Sha Li, Yongquan Xue, Jun-Xian Wang, Zhen-Yi Cai, Jin-Ming Bai,
Danyang Li, Hengxiao Guo, H. T. Liu, Kai-Xing Lu, Jirong Mao, Marcin Marculewicz, Jian-Guo Wang
Abstract: Resolving the inner structures of active galactic nuclei (AGNs) provides the "standard ruler" to measure the parallax
distances of the Universe and a powerful way to weigh supermassive black holes (SMBHs). Thanks to time-domain
observations, it is possible to use the reverberation mapping (RM) technique to measure time delays between different light
curves that probe the structures of the SMBH acc… ▽ More
Submitted 20 August, 2024; originally announced August 2024.
Comments: 18 pages, 8 figures, comments welcome

14. arXiv:2408.11215 [pdf, other]

astro-ph.EP

Aggregate Cloud Particle Effects in Exoplanet Atmospheres
Authors: Sanaz Vahidinia, Sarah E. Moran, Mark S. Marley, Jeff N. Cuzzi
Abstract: Aerosol opacity has emerged as a critical factor controlling transmission and emission spectra. We provide a simple
guideline for the effects of aerosol morphology on opacity and residence time in the atmosphere, as it pertains to transit
observations, particularly those with flat spectra due to high altitude aerosols. This framework can be used for understanding
complex cloud and haze particle pr… ▽ More
Submitted 20 August, 2024; originally announced August 2024.
Comments: 29 pages, 20 figures, accepted for publication in PASP

15. arXiv:2408.11166 [pdf, ps, other]

astro-ph.SR

astro-ph.GA

The Discovery of Three Galactic Wolf-Rayet Stars
Authors: Laurella C. Marin, Philip Massey, Brian A. Skiff, Kennedy A. Farrell
Abstract: Wolf-Rayet stars (WRs) are evolved massive stars in the brief stage before they undergo core collapse. Not only are
they rare, but they also can be particularly difficult to find due to the high extinction in the Galactic plane. This paper discusses
the discovery of three new Galactic WRs previously classified as Hα emission stars, but thanks to Gaia spectra, we were able toidentify the broad,… ▽ More
Submitted 20 August, 2024; originally announced August 2024.
Comments: Accepted for publication in the Astronomical Journal

16. arXiv:2408.11151 [pdf, other]

astro-ph.GA

The Cosmic Ultraviolet Baryon Survey (CUBS) IX: The enriched circumgalactic and intergalactic
medium around star-forming field dwarf galaxies traced by O VI absorption
Authors: Nishant Mishra, Sean D. Johnson, Gwen C. Rudie, Hsiao-Wen Chen, Joop Schaye, Zhijie Qu, Fakhri S. Zahedy, Erin T.
Boettcher, Sebastiano Cantalupo, Mandy C. Chen, Claude-André Faucher-Giguère, Jenny E. Greene, Jennifer I-Hsiu Li, Zhuoqi,
Liu, Sebastian Lopez, Patrick Petitjean
Abstract: The shallow potential wells of star-forming dwarf galaxies make their surrounding circumgalactic and intergalactic
medium (CGM/IGM) sensitive laboratories for studying the inflows and outflows thought to regulate galaxy evolution. We
present new absorption-line measurements in quasar sightlines probing within projected distances of < 300 kpc from 91 starforming field dwarf galaxies with a median… ▽ More
Submitted 20 August, 2024; originally announced August 2024.
Comments: Submitted to ApJ. 18 pages, 6 figures, 2 tables

17. arXiv:2408.11141 [pdf, other]

astro-ph.SR

astro-ph.GA

The variable stars population of the extended young globular cluster NGC 1851
Authors: A. Arellano Ferro, C. E. Pérez Parra, M. A. Yepez, I. H. Bustos Fierro, Z. Prudil, L. J. Zerpa Guillen
Abstract: We report VI CCD photometry of the globular cluster cluster NGC 1851. We aim to study the membership of thevariable stars detected in the field of the cluster as listed in the Catalogue of Variable stars in Globular Clusters (CVSGC;
Clement et al. 2001) and reported by the Gaia mission. We cross match the two sets of variables to produce light curves thatlead to the estimation of physical parame… ▽ More
Submitted 20 August, 2024; originally announced August 2024.
Comments: 16 pages,10 figures, 5 table

18. arXiv:2408.11122 [pdf, other]

astro-ph.GA

First joint MUSE, HST, and JWST spectro-photometric analysis of the intracluster light: the case of
the relaxed cluster RX J2129.7+0005
Authors: Yolanda Jiménez-Teja, Antonio Gimenez-Alcazar, Renato A. Dupke, Patrick Prado-Santos, Jose M. Vílchez, Nícolas O. L.
de Oliveira, Paola Dimauro, Anton M. Koekemoer, Patrick Kelly, Jens Hjorth, Wenlei Chen
Abstract: We present the most detailed spectrum of the intracluster light (ICL) in an individual cluster to date, the relaxedsystem RX J2129.7+0005, at z ∼ 0.234 . Using 15 broad-band, deep images observed with HST and JWST in the optical and theinfrared, plus deep integral field spectroscopy from MUSE, we computed a total of 3696 ICL maps spanning the spectral range∼ 0.4 − 5 µ m with our algorith… ▽ More
Submitted 20 August, 2024; originally announced August 2024.
Comments: 21 pages, 12 figures, 3 tables, accepted for publication in ApJ

19. arXiv:2408.11108 [pdf, ps, other]

astro-ph.GA

The densities in diffuse and translucent molecular clouds: estimates from observations of C2 andfrom 3-dimensional extinction maps
Authors: David A. Neufeld, Daniel E. Welty, Alexei V. Ivlev, Paola Caselli, Gordian Edenhofer, Nick Indriolo, Marta Obolentseva,
Kedron Silsbee, Paule Sonnentrucker, Mark G. Wolfire
Abstract: Newly-computed collisional rate coefficients for the excitation of C2 in collisions with H2 , presented recently by Najar
and Kalugina (2020), are significantly larger than the values adopted previously in models for the excitation of the C2 molecule,a widely used probe of the interstellar gas density. With these new rate coefficients, we have modeled the C2 rotational
distributions in… ▽ More
Submitted 20 August, 2024; originally announced August 2024.
Comments: 46 pages, 11 figures, 1 figure set with 23 figures, accepted for publication in the Astrophysical Journal

20. arXiv:2408.11100 [pdf, other]

astro-ph.SR

astro-ph.GA

astro-ph.HE

astro-ph.IM

Distinguishing between light curves of ellipsoidal variables with massive dark companions,contact binaries, and semidetached binaries using principal component analysis
Authors: Milan Pešta, Ondřej Pejcha
Abstract: Photometric methods for identifying dark companion binaries - binary systems hosting quiescent black holes andneutron stars - operate by detecting ellipsoidal variations caused by tidal interactions. The limitation of this approach is that
contact and semidetached binaries can produce similarly looking light curves. In this work, we address the degeneracy ofellipsoidal light curves by studying t… ▽ More
Submitted 20 August, 2024; originally announced August 2024.
Comments: Submitted to A&A. 25 pages, 13 figures, 3 tables

21. arXiv:2408.11095 [pdf, other]

astro-ph.SR

astro-ph.GA

Anomalously low-mass core-He-burning star in NGC 6819 as a post-common-envelope phaseproduct
Authors: Massimiliano Matteuzzi, David Hendriks, Robert G. Izzard, Andrea Miglio, Karsten Brogaard, Josefina Montalbán,
Marco Tailo, Alessandro Mazzi
Abstract: Precise masses of red-giant stars enable a robust inference of their ages, but there are cases where these age
estimates are highly precise yet very inaccurate. Examples are core-helium-burning (CHeB) stars that have lost more mass than
predicted by standard single-star evolutionary models. Members of star clusters in the Kepler database represent a unique
opportunity to identify such star… ▽ More
Submitted 20 August, 2024; originally announced August 2024.
Comments: Accepted for publication by A&A

22. arXiv:2408.11090 [pdf, other]

astro-ph.GA

High detection significance of the dark substructure in gravitational lens SDSSJ0946+1006 isrevealed by image pixel supersampling
Authors: Quinn E. Minor
Abstract: Recent studies have shown that the dark substructure reported in the gravitational lens SDSSJ0946+1006 has a highcentral density which is in apparent tension with the Λ CDM paradigm. However, the detection significance of the substructure
has been found in Ballard et al. (2024) to be sensitive to the assumed prior on the smoothness of the source galaxy: asufficiently noisy source allows for noi… ▽ More
Submitted 20 August, 2024; originally announced August 2024.
Comments: 22 pages, 16 figures, 2 tables, to be submitted to ApJ

23. arXiv:2408.11037 [pdf, other]

astro-ph.GA

First Light And Reionisation Epoch Simulations (FLARES) XVI: Size Evolution of Massive Dusty
Galaxies at Cosmic Dawn from UV to IR
Authors: Paurush Punyasheel, Aswin P. Vijayan, Thomas R. Greve, William J. Roper, Hiddo Algera, Steven Gillman, Bitten
Gullberg, Dimitrios Irodotou, Christopher C. Lovell, Louise T. C. Seeyave, Peter A. Thomas, Stephen M. Wilkins
Abstract: We use the First Light And Reionisation Epoch Simulations (FLARES) to study the evolution of the rest-frame
ultraviolet (UV) and far-infrared (FIR) sizes for a statistical sample of massive (≳ 109 M⊙ ) high redshift galaxies (z ∈ [5,10]).
Galaxies are post-processed using the SKIRT radiative transfer code, to self-consistently obtain the full spectral energy
distribution and s… ▽ More
Submitted 20 August, 2024; originally announced August 2024.
Comments: 22 pages, 28 figures, data along with code to reproduce figures will be available on GitHub after publication

24. arXiv:2408.11033 [pdf, other]

astro-ph.SR

astro-ph.EP

An FUV-detected Accretion Shock at the Star-Disk Boundary of FU Ori
Authors: Adolfo S. Carvalho, Lynne A. Hillenbrand, Kevin France, Gregory J. Herczeg
Abstract: FU Ori objects are the most extreme eruptive young stars known. Their 4 to 5 magnitude photometric outbursts lastfor decades and are attributed to a factor of up to 10,000 increase in the stellar accretion rate. The nature of the accretion diskto-star interface in FU Ori objects has remained a mystery for decades. To date, attempts to directly observe a shock orboundary layer have been thwarted… ▽ More
Submitted 20 August, 2024; originally announced August 2024.
Comments: 16 pages, 8 figures, accepted to ApJL

25. arXiv:2408.11004 [pdf, other]

astro-ph.CO

astro-ph.EP

astro-ph.IM

Cosmoglobe DR2. III. Improved modelling of zodiacal light with COBE-DIRBE through global
Bayesian analysis
Authors: M. San, M. Galloway, E. Gjerløw, D. J. Watts, R. Aurlien, A. Basyrov, M. Brilenkov, H. K. Eriksen, U. Fuskeland, L. T. Hergt,
D. Herman, H. T. Ihle, J. G. S. Lunde, S. K. Næss, N. -O. Stutzer, H. Thommesen, I. K. Wehus
Abstract: We present an improved zodiacal light model for COBE-DIRBE derived through global Bayesian analysis within the
Cosmoglobe Data Release 2 framework. The parametric form of the ZL model is identical to that introduced by Kelsall et al.
(1998), but the specific best-fit parameter values are re-derived using the combination of DIRBE Calibrated Individual
Observations, Planck HFI sky maps, and WISE and… ▽ More
Submitted 20 August, 2024; originally announced August 2024.
Comments: 27 pages, 21 figures, submitted to A&A

26. arXiv:2408.10980 [pdf, other]

astro-ph.GA

Accelerated Emergence of Evolved Galaxies in Early Overdensities at z ∼ 5.7
Authors: Takahiro Morishita, Zhaoran Liu, Massimo Stiavelli, Tommaso Treu, Michele Trenti, Nima Chartab, Guido RobertsBorsani, Benedetta Vulcani, Pietro Bergamini, Marco Castellano, Claudio Grillo
Abstract: We report the identification of two galaxy overdensities at z ∼ 5.7 in the sightline of the galaxy cluster Abell 2744.
These overdensities consist of 25 and 17 member galaxies, spectroscopically confirmed with JWST NIRSpec/MSA and
NIRCam/WFSS. Each overdensity has a total stellar mass of ∼ 2 × 1010 M⊙ and a star formation rate of ∼ 200M⊙ /yr within acentral region of ra… ▽ More
Submitted 20 August, 2024; originally announced August 2024.
Comments: Submitted to ApJ

27. arXiv:2408.10959 [pdf, other]

astro-ph.EP

physics.atm-clus

Reactive molecular dynamics simulations of micrometeoroid bombardment for space weatheringof asteroid (162173) Ryugu
Authors: Daigo Shoji
Abstract: Remote sensing observations by Hayabusa2 and laboratory measurements have revealed that the phyllosilicates onasteroid (162173) Ryugu are dehydrated/dehydroxylated due to space weathering. Reactive molecular dynamics simulations
were performed to evaluate the magnitude of the dehydroxylation of Mg-rich serpentine by micrometeoroid impacts. Whenmicrometeoroids were not coupled with interplanetary… ▽ More
Submitted 20 August, 2024; originally announced August 2024.
Comments: 18pages, 5 figures, accepted for publication in ApJ

28. arXiv:2408.10938 [pdf, other]

astro-ph.SR

astro-ph.GA

astro-ph.HE

YSO Jets Magnetocentrifugally Driven by Reconnecting Atmospheric Avalanche Accretion Streams
Above Inner Circumstellar Disks
Authors: Yisheng Tu, Zhi-Yun Li, Zhaohuan Zhu, Xiao Hu, Chun-Yen Hsu
Abstract: Fast, collimated jets are ubiquitous features of young stellar objects (YSOs). They are generally thought to be poweredby disk accretion, but the details are debated. Through 2D (axisymmetric) MHD simulations, we find that a fast (> 100 ~km/s)
collimated bipolar jet is continuously driven along the north and south poles of the circumstellar disk that is initially magnetizedby a large-scale open… ▽ More
Submitted 20 August, 2024; originally announced August 2024.

29. arXiv:2408.10925 [pdf, other]

astro-ph.HE

astro-ph.GA

Fate of the remnant in tidal stripping event: repeating and non-repeating
Authors: Jin-Hong Chen, Lixin Dai, Shang-Fei Liu, Jian-Wen Ou
Abstract: Tidal disruption events (TDE) occur when a star ventures too close to a massive black hole. In a partial TDE (pTDE), thestar only grazes the tidal radius, causing the outer envelope of the star to be stripped away while the stellar core survives.
Previous research has shown that a star, once tidally stripped in a parabolic orbit, can acquire enough orbital energy for its
remnant to become a high-… ▽ More
Submitted 20 August, 2024; originally announced August 2024.
Comments: 19 pages, 16 figures, 2 tables, submitted to ApJL

30. arXiv:2408.10891 [pdf, other]

astro-ph.IM

doi

astro-ph.EP

10.1117/12.3018832

Future exoplanet direct imaging instruments: Simulating spatial light modulator-based pixelated
focal-plane coronagraphy
Authors: Liurong Lin, Axel Potier, Ruben Tandon, Jonas G. Kühn
Abstract: The programmable Liquid-crystal Active Coronagraphic Imager for the DAG Telescope (PLACID) instrument will be
installed on the Turkish 4-m Telescope by the fall of 2024 and is expected to be on-sky by the end of the year. PLACID will be
the first ''active stellar coronagraph instrument'', equipped with a customized spatial light modulator (SLM), which performs asa dynamically programmable focal-p… ▽ More
Submitted 20 August, 2024; originally announced August 2024.
Comments: 6 pages, 5 figures, SPIE Astronomical Telescopes + Instrumentation: Ground-based and Airborne Instrumentation for Astronomy X(Yokohama 2024), Paper 130963E

31. arXiv:2408.10890 [pdf, other]

astro-ph.IM

astro-ph.EP

astro-ph.SR

doi

10.1117/12.3018836

Discovery space and science with the PLACID stellar coronagraph
Authors: Ruben Tandon, Liurong Lin, Axel Potier, Laurent Jolissaint, Audrey Baur, Derya Öztürk Çetni, Jonas G. Kühn
Abstract: The world's first ever ''adaptive stellar coronagraph'' facility will be the PLACID instrument, installed on Turkey's newnational observatory 4-m DAG telescope. PLACID incorporates a customized spatial light modulator (SLM) acting as adynamically addressed focal-plane phase mask (FPM) coronagraph in the H-Ks bands. This new approach to high-contrast
imaging will be applied on-sky in late 2024/ea… ▽ More
Submitted 20 August, 2024; originally announced August 2024.
Comments: 8 pages, 6 figures, SPIE Astronomical Telescopes + Instrumentation: Ground-based and Airborne Instrumentation for Astronomy X(Yokohama 2024), Paper 130963F

32. arXiv:2408.10877 [pdf, other]

astro-ph.EP

Varying water activity and momentum transfer on comet 67P/Churyumov-Gerasimenko from its
non-gravitational forces and torques
Authors: N. Attree, P. Gutiérrez, O. Groussin, J. Bürger, H. U. Keller, T. Kramer, R. Lasagni Manghi, M. Läuter, P. Lemos, J.
Markkanen, R. Marschall, C. Schuckart
Abstract: We investigate the ability of a simultaneous fitting of comet 67P/Churyumov-Gerasimenko's non-gravitational forces,
torques and total water-outgassing rate, as observed by Rosetta, to constrain complex thermophysical models of cometary
material. We extend the previous work of fitting geographically defined surface outgassing models to the Rosetta observations
by testing the effects of a more detai… ▽ More
Submitted 20 August, 2024; originally announced August 2024.
Comments: 11 pages, 8 figures, accepted for publication in A&A

33. arXiv:2408.10863 [pdf, other]

astro-ph.EP

astro-ph.IM

LavAtmos 2.0: Incorporating Volatiles Species in Vaporization Models
Authors: Christiaan P. A. van Buchem, Mantas Zilinskas, Yamila Miguel, Wim van Westrenen
Abstract: Due to strong irradiation, hot rocky exoplanets are able to sustain lava oceans. Direct interaction between theseoceans and overlying atmospheres can provide insight into planetary interiors. In order to fully understand how thecomposition of the atmosphere of such planets are affected by the properties of the oceans, comprehensive chemical
equilibrium models are required. Thus far, most models… ▽ More
Submitted 20 August, 2024; originally announced August 2024.
Comments: In rev. A&A (16 pages, 14 figures)

34. arXiv:2408.10851 [pdf, other]

astro-ph.EP

physics.geo-phGeodynamics of super-Earth GJ 486b
Authors: Tobias G. Meier, Dan J. Bower, Tim Lichtenberg, Mark Hammond, Paul J. Tackley, Raymond T. Pierrehumbert, José A.
Caballero, Shang-Min Tsai, Megan Weiner Mansfield, Nicola Tosi, Philipp Baumeister
Abstract: Many super-Earths are on very short orbits around their host star and, therefore, more likely to be tidally locked.
Because this locking can lead to a strong contrast between the dayside and nightside surface temperatures, these super-Earths
could exhibit mantle convection patterns and tectonics that could differ significantly from those observed in the present-day
solar system. The presence of an… ▽ More
Submitted 20 August, 2024; originally announced August 2024.
Comments: 36 pages, 13 figures, resubmitted to JGR: Planets

35. arXiv:2408.10833 [pdf, other]

astro-ph.EP

astro-ph.SR

physics.ao-ph

physics.geo-ph

Evolution of Semi-convective Staircases in Rotating Flows: Consequences for Fuzzy Cores in Giant
Planets
Authors: J. R. Fuentes, Bradley W. Hindman, Adrian E. Fraser, Evan H. Anders
Abstract: Recent observational constraints on the internal structure of Jupiter and Saturn suggest that these planets have``fuzzy" cores, i.e., radial gradients of the concentration of heavy elements that might span 50% to 70% of each planet's radius.
These cores could be composed of a semi-convective staircase, i.e., multiple convective layers separated by diffusive interfaces
arising from double-di… ▽ More
Submitted 20 August, 2024; originally announced August 2024.
Comments: Submitted to AAS Journals, Comments welcome

36. arXiv:2408.10759 [pdf, ps, other]

astro-ph.EP

Chemical composition of comets C/2021 A1 (Leonard) and C/2022 E3 (ZTF) from radio spectroscopy
and the abundance of HCOOH and HNCO in comets
Authors: N. Biver, D. Bockelee-Morvan, B. Handzlik, Aa. Sandqvist, J. Boissier, M. N. Drozdovskaya, R. Moreno, J. Crovisier, D. C.
Lis, M. Cordiner, S. Milam, N. X. Roth, B. P. Bonev, N. Dello Russo, R. Vervack, C. Opitom, H. Kawakita
Abstract: We present the results of a molecular survey of long period comets C/2021 A1 (Leonard) and C/2022 E3 (ZTF). Comet
C/2021 A1 was observed with the IRAM 30-m radio telescope in November-December 2021 before perihelion when it wasclosest to the Earth. We observed C/2022 E3 in January-February 2023 with the Odin 1-m space telescope and IRAM 30-m,
shortly after its perihelion, and when it was closest… ▽ More
Submitted 20 August, 2024; originally announced August 2024.
Comments: To be published in Astronomy & Astrophysics

37. arXiv:2408.10735 [pdf, other]

astro-ph.GA

astro-ph.CO

On the kinematic nature of apparent discs at high redshifts: Local counterparts are not dominatedby ordered rotation but by tangentially anisotropic random motion
Authors: Bitao Wang, Yingjie Peng, Michele Cappellari, Hua Gao, Houjun Mo
Abstract: It is not straightforward to physically interpret the apparent morphology of galaxies. Recent observations by James
Webb Space Telescope (JWST) revealed a dominant galaxy population at high redshifts (z > 2 ) that were visually classified as
discs for their flattened shapes and/or exponential light profiles. The extensively accepted interpretation is that they are
dynamically cold discs supported b… ▽ More
Submitted 20 August, 2024; originally announced August 2024.
Comments: 11 pages, 4 figures. Submitted to ApJL and revised according to referee's report

38. arXiv:2408.10643 [pdf, other]

astro-ph.EP

The missing rings around Solar System moons
Authors: Mario Sucerquia, Jaime A. Alvarado-Montes, Jorge I. Zuluaga, Nicolás Cuello, Jorge Cuadra, Matías Montesinos
Abstract: Rings are complex structures surrounding giant planets and some minor bodies in the Solar System. While someformation mechanisms could also potentially foster their existence around (regular or irregular) satellites, none of these bodies
currently bear these structures. We aim to understand the underlying mechanisms that govern the potential formation,
stability, and/or decay of hypothetical circ… ▽ More
Submitted 20 August, 2024; originally announced August 2024.
Comments: Accepted for publication in Astronomy & Astrophysics

39. arXiv:2408.10629 [pdf, other]

astro-ph.EP

The GAPS Programme at TNG. LIX. A characterisation study of the ∼ 300 Myr old multi-planetarysystem orbiting the star BD+40 2790 (TOI-2076)
Authors: M. Damasso, D. Locci, S. Benatti, A. Maggio, M. Baratella, S. Desidera, K. Biazzo, E. Palle, S. Wang, D. Nardiello, L.
Borsato, A. S. Bonomo, S. Messina, G. Nowak, A. Goyal, V. J. S. Bejar, A. Bignamini, L. Cabona, I. Carleo, R. Claudi, R. Cosentino, S.
Filomeno, C. Knapic, N. Lodieu, V. Lorenzi , et al. (13 additional authors not shown)
Abstract: We collected more than 300 high-resolution spectra of the 300 Myr old star BD+40 2790 (TOI-2076) over ~3 years.
This star hosts three transiting planets discovered by TESS, with orbital periods ~10, 21, and 35 days. BD+40 2790 shows anactivity-induced scatter larger than 30 m/s in the radial velocities. We employed different methods to measure the stellar radial
velocities and several models to f… ▽ More
Submitted 20 August, 2024; originally announced August 2024.
Comments: Accepted for publication on A&A. Abstract abridged

40. arXiv:2408.10583 [pdf]cond-mat.mtrl-sci

astro-ph.EP

doi

10.1002/adem.202302267

High-pressure torsion processing of serine and glutamic acid: Understanding mechanochemical
behavior of amino acids under astronomical impacts
Authors: Kaveh Edalati, Jacqueline Hidalgo-Jiménez, Thanh Tam Nguyen, Motonori Watanabe, Ikuo Taniguchi
Abstract: Astronomical impacts by small solar system bodies (meteoroids, asteroids, comets, and transitional objects) areconsidered a mechanism for delivering amino acids and their polymerization to proteins in early Earth conditions. Highpressure torsion (HPT) is a new methodology to simulate such impacts and clarify the behavior of biomolecules. In this study,
two amino acids, crystalline L-serine and L… ▽ More
Submitted 20 August, 2024; originally announced August 2024.
Journal ref: Advanced Engineering Materials, vol. 26, p. 2302267, 2024

41. arXiv:2408.10559 [pdf, other]

astro-ph.GA

An Accreting Supermassive Black Hole Buried in a Faint Dwarf Galaxy
Authors: Abhishek Paswan, Mousumi Das, K Rubinur
Abstract: In the last decade, there have been several discoveries of Active Galactic Nuclei (AGN) in dwarf galaxies including an
AGN in an ultra-compact dwarf galaxy with a Black Hole mass > 106 M⊙ . However, finding a Supermassive Black Hole (SMBH)
in a dwarf Low Surface Brightness (LSB) galaxy is rare. We report the discovery of a Seyfert type-2 class AGN which is associatedwith a nuclear S… ▽ More
Submitted 20 August, 2024; originally announced August 2024.
Comments: Accepted for publication in ApJL

42. arXiv:2408.10506 [pdf, other]doi

astro-ph.GA

10.3847/1538-4357/ad7019

Correlation between dust continuum and CN line emissions in high-mass star-forming regions
Authors: Jihye Hwang, Chang Won Lee, Jongsoo Kim, Eun Jung Chung, Kee-Tae Kim
Abstract: Measuring the strength of three dimensional (3D) magnetic field vector is challenging as it is not easy to recognize
whether its line-of-sight (LOS) and plane-of-sky (POS) components are obtained from the same region. CN (N = 1 − 0 )emission has been used to get the LOS component of a magnetic field (BLOS ) from its Zeeman splitting lines, while dust
continuum emission has been used t… ▽ More
Submitted 19 August, 2024; originally announced August 2024.
Comments: Accepted in ApJ, 14th Aug 2024

43. arXiv:2408.10449 [pdf, other]

astro-ph.GA

astro-ph.HE

astro-ph.IM

SAUNAS II: Discovery of Cross-shaped X-ray Emission and a Rotating Circumnuclear Disk in the
Supermassive S0 Galaxy NGC 5084
Authors: Alejandro S. Borlaff, Pamela M. Marcum, Pasquale Temi, Nushkia Chamba, S. Drew Chojnowski, Enrique LopezRodriguez, Aneta Siemiginowska, Seppo Laine, Anton M. Koekemoer, Kelly N. Sanderson, Audrey F. Dijeau, Moire K. M. Prescott,Leslie Proudfit, Michael N. Fanelli
Abstract: Combining Chandra, ALMA, EVLA, and Hubble Space Telescope archival data and newly acquired APO/DIS
spectroscopy, we detect a double-lobed 17~kpc X-ray emission with plumes oriented approximately perpendicular and parallelto the galactic plane of the massive lenticular galaxy NGC\,5084 at 0.3--2.0~keV. We detect a highly inclined (i = 71.2+1.8∘−1.7 ),
molecular circumnuclear disk (… ▽ More

Submitted 19 August, 2024; originally announced August 2024.
Comments: Submitted to ApJ in May 21st 2024, in revision. 26 pages, 14 figures

44. arXiv:2408.10406 [pdf, other]

astro-ph.GA

The GT and GHC models for molecular clouds compared. Differences, similarities, and myths
Authors: Enrique Vázquez-Semadeni, Aina Palau, Gilberto C. Gómez, Griselda Arroyo-Chávez, Christian Alig, Javier BallesterosParedes, Vianey Camacho, Alejandro González-Samaniego, Andreas Burkert
Abstract: We provide a detailed comparison between the ``gravoturbulent'' (GT) and ``global hierarchical collapse'' (GHC)models for molecular clouds and star formation, their respective interpretations of the observational data, the features theyshare, and suggested tests and observations to discern between them. Also, we clarify common misconceptions in recent
literature about the global and hierarchical… ▽ More
Submitted 19 August, 2024; originally announced August 2024.
Comments: Submitted to MNRAS. Comments welcome. Animation for Fig. 3 available at https://www.irya.unam.mx/gente/g.gomez/publica/24GT_vs_GHC-f3.mpg

45. arXiv:2408.10403 [pdf, other]doi

astro-ph.GA

10.1093/mnras/stae1970

A Big Red Dot: Scattered light, host galaxy signatures and multi-phase gas flows in a luminous,
heavily reddened quasar at cosmic noon
Authors: Matthew Stepney, Manda Banerji, Shenli Tang, Paul C. Hewett, Matthew J. Temple, Clare F. Wethers, Annagrazia
Puglisi, Stephen J. Molyneux
Abstract: We present a deep X-Shooter rest-frame UV to optical spectral analysis of the heavily reddened quasar,
ULASJ2315+043 at z=2.566, known to reside in a major-merger host galaxy. The rest-frame optical is best-fit by a dust-reddened
quasar E(B-V)_QSO = 1.55 with black-hole mass log10(Hbeta, MBH [M_sol]) = 10.26 +\- 0.05, bolometric luminosity L_Bol =10^48.16 erg s^-1 and Eddington-scaled accretion r… ▽ More
Submitted 21 August, 2024; v1 submitted 19 August, 2024; originally announced August 2024.
Comments: Accepted to MNRAS: 13th Aug 2024. 18 pages, 12 figures

46. arXiv:2408.10393 [pdf, other]

astro-ph.GA

2-process Model and Residual Abundance Analysis of the Milky Way Massive Satellites
Authors: Sten Hasselquist, Christian R. Hayes, Emily J. Griffith, David Weinberg, Tawny Sit, Rachael L. Beaton, Danny Horta
Abstract: The ``2-process Model'' is a promising technique for interpreting stellar chemical abundance data from large-scale
surveys (e.g., SDSS-IV/V, GALAH), enabling more quantitative empirical studies of differences in chemical enrichment history
between galaxies without relying on detailed yield and evolution models. In this work, we fit 2-process model parameters to (1)a luminous giant Milky Way (MW)… ▽ More
Submitted 19 August, 2024; originally announced August 2024.
Comments: 25 pages, 14 figures, accepted for publication in ApJ

47. arXiv:2408.10387 [pdf, other]

astro-ph.GA

Neural Infalling Cloud Equations (NICE): Increasing the Efficacy of Subgrid Models and Scientific
Equation Discovery using Neural ODEs and Symbolic Regression
Authors: Zun Yi Brent Tan
Abstract: It is now well established that galactic systems are inherently multiphase, and that understanding the roles andinteractions of the various phases is key towards a more complete picture of galaxy formation and evolution. For example,
these interactions play a pivotal role in the cycling of baryons which fuels star formation. It remains a challenge that thetransport and dynamics of cold clouds in… ▽ More
Submitted 19 August, 2024; originally announced August 2024.
Comments: 9 Pages, 8 Figures, submitted to MNRAS

48. arXiv:2408.10379 [pdf, other]

astro-ph.GA

Testable predictions of outside-in age gradients in dwarf galaxies of all types
Authors: Claire L. Riggs, Alyson M. Brooks, Ferah Munshi, Charlotte R. Christensen, Roger E. Cohen, Thomas R. Quinn, James
Wadsley
Abstract: We use a sample of 73 simulated satellite and central dwarf galaxies spanning a stellar mass range of
105.3 − 109.1 M⊙ to investigate the origin of their stellar age gradients. We find that dwarf galaxies often form their stars"inside-out," i.e., the stars form at successively larger radii over time. However, the oldest stars get reshuffled beyond the star
forming radius by fluctuation… ▽ More
Submitted 19 August, 2024; originally announced August 2024.
Comments: 25 pages, 9 figures

49. arXiv:2408.10372 [pdf, other]doi

astro-ph.GA

10.3847/1538-4357/ad6b11

An Extragalactic Widefield Search for Technosignatures with the Murchison Widefield Array
Authors: Chenoa D. Tremblay, Steven J. Tingay
Abstract: It is common for surveys that are designed to find artificial signals generated by distant civilizations to focus ongalactic sources. Recently, researchers have started focusing on searching for all other sources within the field observed,
including the vast population of background galaxies. Toward a population of galaxies in the background toward the Vela
supernova remnant, we search for techno… ▽ More
Submitted 19 August, 2024; originally announced August 2024.
Comments: 8 pages, 1 Table, 3 figures. Accepted by ApJ

50. arXiv:2408.10358 [pdf, other]

astro-ph.GA

The All-Sky Impact of the LMC on the Milky Way Circumgalactic Medium
Authors: Christopher Carr, Greg L. Bryan, Nicolás Garavito-Camargo, Gurtina Besla, David J. Setton, Kathryn V. Johnston
Abstract: The first infall of the LMC into the Milky Way (MW) represents a large and recent disruption to the MW circumgalactic
medium (CGM). In this work, we use idealized, hydrodynamical simulations of a MW-like CGM embedded in a live dark matter
halo with an infalling LMC-like satellite initialized with its own CGM to understand how the encounter is shaping the global
physical and kinematic properties of… ▽ More
Submitted 19 August, 2024; originally announced August 2024.
Comments: Submitted to ApJ. 22 pages, 15 Figures. Comments welcomed

51. arXiv:2408.10341 [pdf, other]

astro-ph.IM

astro-ph.EP

astro-ph.SR

doi

10.21105/joss.06816

ExoTiC-LD: thirty seconds to stellar limb-darkening coefficients
Authors: David Grant, Hannah R. Wakeford
Abstract: Stellar limb darkening is the observed variation in brightness of a star between its centre and edge (or limb) whenviewed in the plane of the sky. Stellar brightness is maximal at the centre and then decreases radially and monotonicallytowards the limb -- hence the term "limb darkening". This effect is crucial for finding and characterising planets beyond ourSolar System, known as exoplanets, a… ▽ More
Submitted 19 August, 2024; originally announced August 2024.
Comments: Published in the Journal of Open Source Software

52. arXiv:2408.10336 [pdf, other]

astro-ph.EP

The interior of Uranus: Thermal profile, bulk composition and the distribution of rock, water andhydrogen and helium
Authors: Luca Morf, Simon Müller, Ravit Helled
Abstract: We present improved empirical density profiles of Uranus and interpret them in terms of their temperature andcomposition using a new random algorithm. The algorithm to determine the temperature and composition is agnostic withrespect to the temperature gradient in non-isentropic regions and chooses randomly amongst all possible gradients that arestable against convection and correspond to an Eq… ▽ More
Submitted 21 August, 2024; v1 submitted 19 August, 2024; originally announced August 2024.
Comments: Accepted for publication in A&A

53. arXiv:2408.10320 [pdf, other]

astro-ph.GA

astro-ph.CO

The Carousel Lens: A Well-Modeled Strong Lens with Multiple Lensed Sources
Authors: William Sheu, Aleksandar Cikota, Xiaosheng Huang, Karl Glazebrook, Christopher Storfer, Shrihan Agarwal, David J.
Schlegel, Nao Suzuki, Tania M. Barone, Fuyan Bian, Tesla Jeltema, Tucker Jones, Glenn G. Kacprzak, Jackson H. O'Donnell,
Keerthi Vasan G. C
Abstract: Over the past few years alone, the lensing community has discovered thousands of strong lens candidates, andspectroscopically confirmed hundreds of them. In this time of abundance, it becomes pragmatic to focus our time andresources on the few extraordinary systems, in order to most efficiently study the universe. In this paper, we present such asystem: DESI-090.9854-35.9683, a cluster-scale le… ▽ More
Submitted 19 August, 2024; originally announced August 2024.
Comments: 14 pages, 6 figures

54. arXiv:2408.10316 [pdf, other]

astro-ph.GA

astro-ph.CO

Project Dinos II: Redshift evolution of dark and luminous matter density profiles in strong-lensing
elliptical galaxies across 0.1 < z < 0.9
Authors: William Sheu, Anowar J. Shajib, Tommaso Treu, Alessandro Sonnenfeld, Simon Birrer, Michele Cappellari, Lindsay J.
Oldham, Chin Yi Tan
Abstract: We present a new measurement of the dark and luminous matter distribution of massive elliptical galaxies, and theirevolution with redshift, by combining strong lensing and dynamical observables. Our sample of 58 lens galaxies covers aredshift range of 0.090 ≤ zl ≤ 0.884 . By combining new Hubble Space Telescope imaging with previously observed velocity
dispersion and line-of-sight mea… ▽ More
Submitted 19 August, 2024; originally announced August 2024.
Comments: 28 pages, 20 figures

55. arXiv:2408.10305 [pdf, other]

astro-ph.GA

astro-ph.CO

Not-so-little Red Dots: Two massive and dusty starbursts at z~5-7 pushing the limits of starformation discovered by JWST in the COSMOS-Web survey
Authors: Fabrizio Gentile, Caitlin M. Casey, Hollis B. Akins, Maximilien Franco, Jed McKinney, Edward Berman, Olivia R. Cooper,
Nicole E. Drakos, Michaela Hirschmann, Arianna S. Long, Georgios Magdis, Anton M. Koekemoer, Vasily Kokorev, Marko
Shuntov, Margherita Talia, Natalie Allen, Santosh Harish, Olivier Ilbert, Henry J. McCracken, Jeyhan S. Kartaltepe, Daizhong Liu,Louise Paquereau, Jason Rhodes, Michael R. Rich, Brant Robertson , et al. (2 additional authors not shown)
Abstract: We present the properties of two candidate massive (M⋆ ∼ 1011 M⊙ ) and dusty (Av > 2.5 mag) galaxies at
z = 5 − 7 in the first 0.28 deg2 of the COSMOS-Web survey. One object is spectroscopically confirmed at zspec = 5.051 , while
the other has a robust zphot = 6.7 ± 0.3 . Thanks to their extremely red colors (F 277W − F 444W ∼ 1.7 mag), thesegalaxies satisfy the n… ▽ More
Submitted 19 August, 2024; originally announced August 2024.
Comments: 11 pages, 4 figures, 1 table. Accepted for publication in ApJL

56. arXiv:2408.10299 [pdf, other]

astro-ph.EP

astro-ph.SR

RV measurements of directly imaged brown dwarf GQ Lup B to search for exo-satellites
Authors: Katelyn Horstman, Jean-Baptiste Ruffio, Konstantin Batygin, Dimitri Mawet, Ashley Baker, Chih-Chun Hsu, Jason J.
Wang, Ji Wang, Sarah Blunt, Jerry W. Xuan, Yinzi Xin, Joshua Liberman, Shubh Agrawal, Quinn M. Konopacky, Geoffrey A. Blake,
Clarissa R. Do O, Randall Bartos, Charlotte Z. Bond, Benjamin Calvin, Sylvain Cetre, Jacques-Robert Delorme, Greg Doppmann,
Daniel Echeverri, Luke Finnerty, Michael P. Fitzgerald , et al. (13 additional authors not shown)
Abstract: GQ Lup B is one of the few substellar companions with a detected cicumplanetary disk, or CPD. Observations of the
CPD suggest the presence of a cavity, possibly formed by an exo-satellite. Using the Keck Planet Imager and Characterizer(KPIC), a high contrast imaging suite that feeds a high resolution spectrograph (1.9-2.5 microns, R∼ 35,000), we present the first
dedicated radial velocity (RV… ▽ More
Submitted 19 August, 2024; originally announced August 2024.
Comments: 15 pages, 5 figures

57. arXiv:2408.10293 [pdf]q-bio.PE

astro-ph.EP

A reassessment of the "hard-steps" model for the evolution of intelligent life
Authors: Daniel B. Mills, Jennifer L. Macalady, Adam Frank, Jason T. Wright
Abstract: According to the "hard-steps" model, the origin of humanity required "successful passage through a number ofintermediate steps" (so-called "hard" or "critical" steps) that were intrinsically improbable with respect to the total time
available for biological evolution on Earth. This model similarly predicts that technological life analogous to human life on Earthis "exceedingly rare" in the unive… ▽ More
Submitted 19 August, 2024; originally announced August 2024.

58. arXiv:2408.10206 [pdf, other]

astro-ph.EP

The Resonant Remains of Broken Chains from Major and Minor Mergers
Authors: Rixin Li, Eugene Chiang, Nick Choksi, Fei Dai
Abstract: Observations with the Transiting Exoplanet Survey Satellite and Kepler have revealed that practically all close-in subNeptunes form in mean-motion resonant chains, most of which unravel on timescales of 100 Myr. Using a series of N-body
integrations, we study how planetary collisions resulting from the destabilization of resonant chains produce the distribution ofFeedback?

Simple Search

orbital periods observed among m… ▽ More
Submitted 19 August, 2024; originally announced August 2024.
Comments: Submitted to AAS Journals, comments welcome

59. arXiv:2408.10199 [pdf, other]

astro-ph.SR

astro-ph.GA

Magnetic Fields in Massive Star-forming Regions (MagMaR) IV: Tracing the Magnetic Fields in the
O-type protostellar system IRAS 16547− 4247
Authors: Luis A. Zapata, Manuel Fernández-López, Patricio Sanhueza, Josep M. Girart, Luis F. Rodríguez, Paulo Cortes, Koch
Patrick, María T. Beltrán, Kate Pattle, Henrik Beuther, Piyali Saha, Wenyu Jiao, Fengwei Xu, Xing Walker Lu, Fernando Olguin,Shanghuo Li, Ian W. Stephens, Ji-hyun Kang, Yu Cheng, Spandan Choudhury, Kaho Morii, Eun Jung Chung, Jia-Wei Wang, Jihye
Hwang, A-Ran Lyo , et al. (2 additional authors not shown)
Abstract: The formation of the massive stars, and in particular, the role that the magnetic fields play in their early evolutionary
phase is still far from being completely understood. Here, we present Atacama Large Millimeter/Submillimeter Array (ALMA) 1.2
mm full polarized continuum, and H13 CO+ (3− 2), CS(5− 4), and HN13 C(3− 2) line observations with a high angular resolution (∼ 0.4… ▽ More
Submitted 19 August, 2024; originally announced August 2024.
Comments: Accepted by the Astrophysical Journal, 13 pages

60. arXiv:2408.10179 [pdf, other]

astro-ph.EP

physics.ao-ph

doi

physics.geo-ph10.1038/s41467-024-51412-8

Three-stage Formation of Cap Carbonates after Marinoan Snowball Glaciation Consistent with
Depositional Timescales and Geochemistry
Authors: Trent B. Thomas, David C. Catling
Abstract: At least two global "Snowball Earth" glaciations occurred during the Neoproterozoic Era (1000-538.8 million yearsago). Post-glacial surface environments during this time are recorded in cap carbonates: layers of limestone or dolostone that
directly overlie glacial deposits. Postulated environmental conditions that created the cap carbonates lack consensus largely
because single hypotheses fail to… ▽ More
Submitted 19 August, 2024; originally announced August 2024.
Comments: Main text is 30 pages double spaced. 8 figures, 1 table. Supplementary Material included at end of file. Published in Nature
Communications
Journal ref: Nat Commun 15, 7055 (2024)

61. arXiv:2408.10173 [pdf, other]

astro-ph.EP

doi

astro-ph.IM

10.1117/12.3018020

Fringing analysis and forward modeling of Keck Planet Imager and Characterizer (KPIC) spectra
Authors: Katelyn A. Horstman, Jean-Baptiste Ruffio, Jason J. Wang, Chih-Chun Hsu, Ashley Baker, Luke Finnerty, Jerry Xuan,
Daniel Echeverri, Dimitri Mawet, Geoffrey A. Blake, Randall Bartos, Charlotte Z. Bond, Benjamin Calvin, Sylvain Cetre, JacquesRobert Delorme, Greg Doppmann, Michael P. Fitzgerald, Nemanja Jovanovic, Ronald Lopez, Emily C. Martin, Evan Morris, Jacklyn
Pezzato, Garreth Ruane, Ben Sappey, Tobias Schofield , et al. (5 additional authors not shown)
Abstract: The Keck Planet Imager and Characterizer (KPIC) combines high contrast imaging with high resolution spectroscopy (R∼ 35,000 in K band) to study directly imaged exoplanets and brown dwarfs in unprecedented detail. KPIC aims to spectrally
characterize substellar companions through measurements of planetary radial velocities, spins, and atmospheric composition.
Currently, the dominant source of s… ▽ More
Submitted 19 August, 2024; originally announced August 2024.
Comments: 13 pages, 6 figures
Journal ref: Proc. SPIE 13096, Ground-based and Airborne Instrumentation for Astronomy X, 130962E (18 July 2024)

62. arXiv:2408.10160 [pdf, other]

10.3847/2515-5172/ad6f10

doi

astro-ph.GA

Galaxy Zoo: Morphologies based on UKIDSS NIR Imaging for 71,052 Galaxies
Authors: Karen L. Masters, Melanie Galloway, Lucy Fortson, Chris Lintott, Mike Read, Claudia Scarlata, Brooke Simmons, Mike
Walmsley, Kyle Willett
Abstract: We present morphological classifications based on Galaxy Zoo analysis of 71,052 galaxies with imaging from theUnited Kingdom Infrared Telescope Infrared Deep Sky Survey (UKIDSS). Galaxies were selected out of the Galaxy Zoo 2 (GZ2)
sample, so also have gri imaging from the Sloan Digital Sky Survey. An identical classification tree, and voteweighting/aggregation was applied to both UKIDSS and GZ2… ▽ More
Submitted 19 August, 2024; originally announced August 2024.
Comments: 3 pages, 1 figure

63. arXiv:2408.10112 [pdf, other]

astro-ph.SR

astro-ph.GA

Eight New Substellar Hyades Candidates from the UKIRT Hemisphere Survey
Authors: Adam C. Schneider, Michael C. Cushing, Robert A. Stiller, Jeffrey A. Munn, Frederick J. Vrba, Justice Bruursema, Stephen
J. Williams, Michael C. Liu, Alexia Bravo, Jacqueline K. Faherty, Austin Rothermich, Emily Calamari, Dan Caselden, Martin
Kabatnik, Arttu Sainio, Thomas P. Bickle, William Pendrill, Nikolaj Stevnbak Andersen, Melina Thevenot
Abstract: We have used the UKIRT Hemisphere Survey (UHS) combined with the UKIDSS Galactic Cluster Survey (GCS), the
UKIDSS Galactic Plane Survey (GPS), and the CatWISE2020 catalog to search for new substellar members of the nearest open
cluster to the Sun, the Hyades. Eight new substellar Hyades candidate members were identified and observed with theGemini/GNIRS near-infrared spectrograph. All eight objec… ▽ More
Submitted 19 August, 2024; originally announced August 2024.
Comments: Accepted to AJ

64. arXiv:2408.10051 [pdf, other]

astro-ph.CO

astro-ph.GA

Revised LOFAR upper limits on the 21-cm signal power spectrum at z ≈ 9.1 using Machine
Learning and Gaussian Process Regression
Authors: Anshuman Acharya, Florent Mertens, Benedetta Ciardi, Raghunath Ghara, Léon V. E. Koopmans, Saleem Zaroubi
Abstract: The use of Gaussian Process Regression (GPR) for foregrounds mitigation in data collected by the LOw-Frequency
ARray (LOFAR) to measure the high-redshift 21-cm signal power spectrum has been shown to have issues of signal loss whenthe 21-cm signal covariance is misestimated. To address this problem, we have recently introduced covariance kernels
obtained by using a Machine Learning based Variatio… ▽ More
Submitted 20 August, 2024; v1 submitted 19 August, 2024; originally announced August 2024.
Comments: 5 pages, 3 figures, 2 tables. Accepted for publication in the Monthly Notices of the Royal Astronomical Society (MNRAS) Letters

65. arXiv:2408.10038 [pdf, other]

astro-ph.EP

Single-Star Warm-Jupiter Systems Tend to Be Aligned, Even Around Hot Stellar Hosts: No Teeffff − λDependency
Authors: Xian-Yu Wang, Malena Rice, Songhu Wang, Shubham Kanodia, Fei Dai, Sarah E. Logsdon, Heidi Schweiker, Johanna K.
Teske, R. Paul Butler, Jeffrey D. Crane, Stephen A. Shectman, Samuel N. Quinn, Veselin B. Kostov, Hugh P. Osborn, Robert F.
Goeke, Jason D. Eastman, Avi Shporer, David Rapetti, Karen A. Collins, Cristilyn Watkins, Howard M. Relles, George R. Ricker,
Sara Seager, Joshua N. Winn, Jon M. Jenkins
Abstract: The stellar obliquity distribution of warm-Jupiter systems is crucial for constraining the dynamical history of Jovian
exoplanets, as the warm Jupiters' tidal detachment likely preserves their primordial obliquity. However, the sample size ofwarm-Jupiter systems with measured stellar obliquities has historically been limited compared to that of hot Jupiters,
particularly in hot-star systems. In t… ▽ More
Submitted 19 August, 2024; originally announced August 2024.
Comments: 18 pages, 2 figures, accepted for publication in ApJL

66. arXiv:2408.09986 [pdf, other]

astro-ph.EP

Ocean Circulation on Tide-locked Lava Worlds, Part I: An Idealized 2D Numerical Model
Authors: Yanhong Lai, Jun Yang, Wanying Kang
Abstract: A magma ocean is expected to exist on the dayside of tide-locked planets if surface temperature exceeds the melting
temperature of typical crust. As highly prioritized targets for the James Webb Space Telescope (JWST), more information about
the surface and atmosphere of lava planets will soon be available. In most previous studies of lava planets, the system istypically assumed to be vigorously… ▽ More
Submitted 19 August, 2024; originally announced August 2024.
Comments: 26 pages, 9 figures; accepted for publication in Planetary Science Journal (PSJ)

67. arXiv:2408.09985 [pdf, other]

astro-ph.EP

Ocean Circulation on Tide-locked Lava Worlds, Part II: Scalings
Authors: Yanhong Lai, Wanying Kang, Jun Yang
Abstract: On tidally locked lava planets, magma ocean can form on the permanent dayside. The circulation of the magma
ocean can be driven by stellar radiation and atmospheric winds. The strength of ocean circulation and the depth of the magma
ocean depend on external forcings and the dominant balance of the momentum equation. In this study, we develop scalinglaws for the magma ocean depth, oceanic current… ▽ More
Submitted 19 August, 2024; originally announced August 2024.
Comments: 22 pages, 7 figures; accepted for publication in Planetary Science Journal (PSJ)

68. arXiv:2408.09944 [pdf, other]

astro-ph.GA

Detection of the [O I] 63 µ m emission line from the z = 6.04 quasar J2054-0005
Authors: Nozomi Ishii, Takuya Hashimoto, Carl Ferkinhoff, Matus Rybak, Akio K. Inoue, Tomonari Michiyama, Darko Donevski,
Seiji Fujimoto, Dragan Salak, Nario Kuno, Hiroshi Matsuo, Ken Mawatari, Yoichi Tamura, Takuma Izumi, Tohru Nagao, Yurina
Nakazato, Wataru Osone, Yuma Sugahara, Mitsutaka Usui, Koki Wakasugi, Hidenobu Yajima, Tom J. L. C. Bakx, Yoshinobu
Fudamoto, Romain A. Meyer, Fabian Walter , et al. (1 additional authors not shown)
Abstract: We report the highest-redshift detection of [O I] 63 µ m from a luminous quasar, J2054-0005, at z = 6.04 based on
the Atacama Large Millimeter/sub-millimeter Array Band 9 observations. The [O I] 63 µ m line luminosity is(4.5 ± 1.5) × 109 L⊙ , corresponding to the [O I] 63 µ m-to-far-infrared luminosity ratio of ≈ 6.7 × 10−4 , which is consistent
with the value… ▽ More

Submitted 19 August, 2024; originally announced August 2024.
Comments: Submitted to PASJ. 5 figures and 3 tables. Comments are very welcome

69. arXiv:2408.09932 [pdf, other]

astro-ph.GA

Warps induced by satellites on barred and non-barred galaxies
Authors: Andressa Wille, Rubens E. G. Machado
Abstract: Warps are common vertical asymmetries that appear in the outer parts of the galactic discs, bending one part
upwards and the other downwards. Many mechanisms can trigger warp formation, including tidal interactions. The interactions
with satellites distort the edges of the disc and can also change the central morphology, impacting, for example, thedevelopment of a galactic bar. In mergers events,… ▽ More
Submitted 19 August, 2024; originally announced August 2024.
Comments: 11 pages, 18 figures, accepted for publication in MNRAS

70. arXiv:2408.09898 [pdf, other]

astro-ph.GA

Anatomy of the Star-formation in a Tidally Disturbed Disk galaxy: NGC 3718
Authors: Chandan Watts, Mousumi Das, Sudhanshu Barway
Abstract: We present a UV, optical and near-infrared (near-IR) study of the star-forming complexes in the nearby peculiar
galaxy NGC 3718, using UVIT, GALEX, Spitzer and DECaLS imaging data. The galaxy has a disturbed optical morphology due tothe multiple tidal arms, the warped disk and the prominent curved dust lanes, but in the near-IR, it appears to be a bulgedominated galaxy. Its disturbed morphology… ▽ More
Submitted 19 August, 2024; originally announced August 2024.
Comments: 13 pages, 8 figures, 3 tables. Accepted for publication in ApJ

71. arXiv:2408.09867 [pdf, other]

astro-ph.GA

astro-ph.SR

Physical properties of embedded clusters in ATLASGAL clumps with HII regions
Authors: J. W. Zhou, Pavel Kroupa, Sami Dib
Abstract: Using the optimal sampling model, we synthesized the embedded clusters of ATLASGAL clumps with HII regions (HIIclumps). The 0.1 Myr isochrone was used to estimate the bolometric luminosity of each star in an embedded cluster, we also
added the accretion luminosity of each star in the embeded cluster. The total bolometric luminosity of synthetic embeddedclusters can well fit the observed bolometr… ▽ More
Submitted 19 August, 2024; originally announced August 2024.
Comments: 7 pages, 10 figures, Accepted for publication

72. arXiv:2408.09793 [pdf, other]

astro-ph.EP

Obliquities of Exoplanet Host Stars: 19 New and Updated Measurements, and Trends in the
Sample of 205 Measurements
Authors: Emil Knudstrup, Simon H. Albrecht, Joshua N. Winn, Davide Gandolfi, John J. Zanazzi, Carina M. Persson, Malcolm
Fridlund, Marcus L. Marcussen, Ashley Chontos, Marcelo A. F. Keniger, Nora L. Eisner, Allyson Bieryla, Howard Isaacson, Andrew
W. Howard, Lea A. Hirsch, Felipe Murgas, Norio Narita, Enric Palle, Yugo Kawai, David Baker
Abstract: Measurements of the obliquities in exoplanet systems have revealed some remarkable architectures, some of which
are very different from the Solar System. Nearly 200 obliquity measurements have been obtained through observations of the
Rossiter-McLaughlin (RM) effect. Here we report on observations of 19 planetary systems that led to 17 clear detections of theRM effect and 2 less secure detections… ▽ More
Submitted 19 August, 2024; originally announced August 2024.
Comments: 47 pages, 43 figures. Accepted for publication in A&A

73. arXiv:2408.09784 [pdf, other]

astro-ph.GA

Apostle--Auriga: Effects of stellar feedback subgrid models on the evolution of angular momentum
in disc galaxies
Authors: Hang Yang, Shihong Liao, Azadeh Fattahi, Carlos S. Frenk, Liang Gao, Qi Guo, Shi Shao, Lan Wang, Ruby J. Wright,
Guangquan Zeng
Abstract: Utilizing the Apostle--Auriga simulations, which start from the same zoom-in initial conditions of Local Group-likesystems but run with different galaxy formation subgrid models and hydrodynamic solvers, we study the impact of stellar
feedback models on the evolution of angular momentum in disc galaxies. At z = 0 , Auriga disc galaxies tend to exhibit higher
specific angular momenta compared to… ▽ More
Submitted 19 August, 2024; originally announced August 2024.
Comments: 12 pages, 8 figures, submitted to MNRAS. comments are welcome

74. arXiv:2408.09750 [pdf, other]

astro-ph.GA

Double-peaked Narrow Emission-Line Galaxies in SDSS-IV MaNGA
Authors: Jiajie Qiu, Shiyin Shen, Shuai Feng, Yanmei Chen, Ruixiang Chang, Qianwen Zhao, Qi Zeng
Abstract: Narrow emission lines in a galaxy's spectrum that show double peaks indicate the presence of distinct gas
components with different velocities, and its physical origin remains uncertain. This study uses galaxies from the final MaNGA
data release to detect double-peaked narrow emission-line spaxels (DPSs) by examining the double Gaussian profiles of the Hα-[N \uppercase\expandafter{\romannumeral… ▽ More
Submitted 19 August, 2024; originally announced August 2024.
Comments: 15 pages, 10 figures, 2 tables

75. arXiv:2408.09690 [pdf, other]

astro-ph.GA

Curvature Mapping Method: Mapping Lorentz Force in Orion A
Authors: Mengke Zhao, Guang-Xing Li, Keping Qiu
Abstract: Magnetic force is a fundamental force in nature. Although widely believed to be important in counterbalancing
against collapse in star formation, a clear evaluation of the role of the magnetic field in star formation remains hard to achieve.
Past research attempts to evaluate the importance of magnetic forces using diagnostics such as the mass-to-flux ratio, whichmeasures its strength but not how… ▽ More
Submitted 18 August, 2024; originally announced August 2024.
Comments: 9 pages, 5 figures; submitted, comments welcome!!

76. arXiv:2408.09614 [pdf, other]

astro-ph.EP

astro-ph.SR

Discovery of a Jupiter Analog Misaligned to the Inner Planetary System in HD 73344
Authors: Jingwen Zhang, Lauren M. Weiss, Daniel Huber, Jerry W. Xuan, Michael Bottom, Benjamin J. Fulton, Howard Isaacson,
Mason G. MacDougall, Nicholas Saunders+0.25
Abstract: We present the discovery of a Jupiter-like planet, HD 73344 d (md = 2.55+0.56−0.46 MJ , ad = 6.70−0.26 AU,

ed = 0.18+0.14−0.12 ) based on 27-year radial velocity observations. HD 73344 also hosts a compact inner planetary system,
including a transiting sub-Neptune HD 73344 b (Pb = 15.61 days, rb = 2.88+0.08−0.07 R⊕ )… ▽ More
Submitted 18 August, 2024; originally announced August 2024.
Comments: 15 pages, 9 figures, submitted to AJ

77. arXiv:2408.09606 [pdf, other]

astro-ph.EP

astro-ph.SR

Global weather map reveals persistent top-of-atmosphere features on the nearest brown dwarfs
Authors: Xueqing Chen, Beth A. Biller, Johanna M. Vos, Ian J. M. Crossfield, Gregory N. Mace, Callie E. Hood, Xianyu Tan, Katelyn
N. Allers, Emily C. Martin, Emma Bubb, Jonathan J. Fortney, Caroline V. Morley, Mark Hammond
Abstract: Brown dwarfs and planetary-mass companions display rotationally modulated photometric variability, especiallythose near the L/T transition. This variability is commonly attributed to top-of-atmosphere (TOA) inhomogeneities, withproposed models including patchy thick and thin clouds, planetary-scale jets, or chemical disequilibrium. Surface mapping
techniques are powerful tools to probe their atm… ▽ More
Submitted 18 August, 2024; originally announced August 2024.
Comments: 32 pages, 14 figures, accepted for publication in MNRAS

78. arXiv:2408.09517 [pdf, other]

astro-ph.GA

Extreme Metallicity Dwarf Galaxies in IllustrisTNG
Authors: Timothy Carleton, Jacqueline Monkiewicz
Abstract: The use of extremely metal-deficient dwarf galaxies (XMDs) as nearby analogs for high-redshift protogalaxies isgenerating renewed interest due to recent JWST observations studying these protogalaxies. However, the existence of a
population of unenriched galaxies at z ∼ 0 raises fundamental questions about how galaxies with such pristine gas reservoirs
could be formed. To address these question… ▽ More
Submitted 18 August, 2024; originally announced August 2024.
Comments: 16 pages, 22 figures. Submitted to MNRAS

79. arXiv:2408.09482 [pdf, other]

astro-ph.GA

astro-ph.IM

First Discovery and Confirmation of PN Candidates Found from AI and Deep Learning Techniques
Applied to VPHAS+ Survey Data
Authors: Yushan Li, Quentin Parker, Peng Jia
Abstract: Context. We have developed deep learning (DL) and AI-based tools to search extant narrow-band wide-field Hαsurveys of the Galactic Plane for elusive planetary nebulae (PNe) which are hidden in dense star fields towards the Galactic
center. They are faint, low-surface brightness, usually resolved sources, which are not discovered by previous automatic
searches that depend on photometric data for… ▽ More
Submitted 18 August, 2024; originally announced August 2024.

80. arXiv:2408.09319 [pdf, other]

astro-ph.EP

astro-ph.GA

astro-ph.SR

On the Formation of Planets in the Milky Way's Thick Disk
Authors: Tim Hallatt, Eve J. Lee
Abstract: Exoplanet demographic surveys have revealed that close-in (≲ 1 au) small planets orbiting stars in the Milky Way's
thick disk are ∼50% less abundant than those orbiting stars in the Galactic thin disk. One key difference between the twostellar populations is the time at which they emerged: thick disk stars are the likely product of cosmic noon (redshift z∼2 ), an
era char… ▽ More
Submitted 17 August, 2024; originally announced August 2024.
Comments: Submitted to ApJ. Comments welcome

81. arXiv:2408.09296 [pdf]astro-ph.EP

astro-ph.SR

Analysis of Habitability and Stellar Habitable Zones from Observed Exoplanets
Authors: Jonathan H. Jiang, Philip E. Rosen, Christina X. Liu, Qianzhuang Wen, Yanbei Chen
Abstract: The investigation of exoplanetary habitability is integral to advancing our knowledge of extraterrestrial life potential
and detailing the environmental conditions of distant worlds. In this analysis, we explore the properties of exoplanets situatedwith respect to circumstellar habitable zones by implementing a sophisticated filtering methodology on data from the NASA
Exoplanet Archive. This rese… ▽ More
Submitted 17 August, 2024; originally announced August 2024.

82. arXiv:2408.09268 [pdf, ps, other]

astro-ph.SR

astro-ph.EP

On the Age and Metallicity of Planet-hosting Triple Star Systems
Authors: Manfred Cuntz, Shaan D. Patel
Abstract: We present a statistical analysis of the ages and metallicities of triple stellar systems that are known to host
exoplanets. With controversial cases disregarded, so far 27 of those systems have been identified. Our analysis, based on an
exploratory approach, shows that those systems are on average notably younger than stars situated in the solar neighborhood.
Though the statistical significance o… ▽ More
Submitted 17 August, 2024; originally announced August 2024.
Comments: Accepted by Astrophysics and Space Science (Ap&SS); 12 pages, including 4 figures and 7 tables

83. arXiv:2408.09260 [pdf]astro-ph.IM

astro-ph.EP

physics.ins-det

doi

10.3390/rs16163030

Analysis of the Effect of Tilted Corner Cube Reflector Arrays on Lunar Laser Ranging
Authors: Jin Cao, Rufeng Tang, Kai Huang, Zhulian Li, Yongzhang Yang, Kai Huang, Jintao Li, Yuqiang Li
Abstract: This paper primarily investigates the effect of the tilt of corner cube reflector (CCR) arrays on lunar laser ranging (LLR).
A mathematical model was established to study the random errors caused by the tilt of the CCR arrays. The study found that,
ideally, when the laser ranging pulse width is 10 picoseconds or less, it is possible to distinguish from which specific cornercubes within the CCR ar… ▽ More
Submitted 21 August, 2024; v1 submitted 17 August, 2024; originally announced August 2024.
Journal ref: Remote Sens. 2024, 16(16), 3030

84. arXiv:2408.09252 [pdf, other]

10.3847/2041-8213/ad6c51

doi

astro-ph.GA

Parabolic-like Trend in SiO Ratios throughout the Central Molecular Zone: Possible Signature of a
Past Nuclear Activity in the Galactic Center
Authors: Shunya Takekawa, Tomoharu Oka, Shiho Tsujimoto, Hiroki Yokozuka, Nanase Harada, Miyuki Kaneko, Rei Enokiya,
Yuhei Iwata
Abstract: We report the discovery of a characteristic trend in the intensity ratios of SiO emissions across the Central MolecularZone (CMZ) of our Galaxy. Using the Nobeyama Radio Observatory 45-m telescope, we conducted large-scale, high-sensitivity
imaging observations in molecular lines including SiO J =2− 1 and CS J =2− 1. By identifying SiO-emitting clouds and examining
their intensity ratios rela… ▽ More
Submitted 17 August, 2024; originally announced August 2024.
Comments: 9 pages, 4 figures, accepted for publication in the Astrophysical Journal Letters

85. arXiv:2408.09216 [pdf, other]

astro-ph.EP

Asymmetric dust accumulation of the PDS 70 disk revealed by ALMA Band 3 observations
Authors: Kiyoaki Doi, Akimasa Kataoka, Hauyu Baobab Liu, Tomohiro C. Yoshida, Myriam Benisty, Ruobing Dong, Yoshihide
Yamato, Jun Hashimoto
Abstract: The PDS 70 system, hosting two planets within its disk, is an ideal target for examining the effect of planets on dust
accumulation, growth, and ongoing planet formation. Here, we present high-resolution (0. ′′ 07 = 8 au ) dust continuum
observations of the PDS 70 disk in ALMA Band 3 (3.0 mm). While previous Band 7 observations showed a dust ring with slightasymmetry, our Band 3 observa… ▽ More
Submitted 17 August, 2024; originally announced August 2024.
Comments: submitted

86. arXiv:2408.09129 [pdf, other]

astro-ph.EP

astro-ph.IM

Pursuing Truth: Improving Retrievals on Mid-Infrared Exo-Earth Spectra with Physically Motivated
Water Abundance Profiles and Cloud Models
Authors: Björn S. Konrad, Sascha P. Quanz, Eleonora Alei, Robin Wordsworth
Abstract: Atmospheric retrievals are widely used to constrain exoplanet properties from observed spectra. We investigate how
the common nonphysical retrieval assumptions of vertically constant molecule abundances and cloud-free atmospheres affectour characterization of an exo-Earth (an Earth-twin orbiting a Sun-like star). Specifically, we use a state-of-the-art retrieval
framework to explore how assumptio… ▽ More
Submitted 17 August, 2024; originally announced August 2024.
Comments: Re-submitted to ApJ after a first iteration with referee; 17 pages (main text incl. 9 figures and 5 tables) + appendix; comments arewelcome87. arXiv:2408.09038 [pdf, other]

astro-ph.SR

doi

astro-ph.EP

10.1093/mnras/stae1957

Multiband polarimetric imaging of HD 34700 with SCExAO/CHARIS
Authors: Minghan Chen, Kellon Lawson, Timothy D. Brandt, Briley L. Lewis, Taichi Uyama, Max Millar-Blanchaer, Ryo Tazaki,
Thayne Currie
Abstract: We present Subaru/SCExAO + CHARIS broadband (JHK) integral field spectroscopy of HD 34700 A in polarized light.
CHARIS has the unique ability to obtain polarized integral field images at 22 wavelength channels in broadband, as theincoming light is first split into different polarization states before passing though the lenslet array. We recover the transition
disk around HD 34700 A in multiband p… ▽ More
Submitted 16 August, 2024; originally announced August 2024.
Journal ref: Monthly Notices of the Royal Astronomical Society, 2024;, stae1957

88. arXiv:2408.09024 [pdf, other]

astro-ph.HE

astro-ph.CO

astro-ph.GA

astro-ph.SR

hep-phInvestigating the mixing between two black hole populations in LIGO-Virgo-KAGRA GWTC-3
Authors: Ming-Feng Ho, Scott Ellis Perkins, Simeon Bird, William Dawson, Nathan Golovich, Jessica R. Lu, Peter McGill
Abstract: We introduce a population model to analyze the mixing between hypothesised power-law and ∼ 35M⊙ Gaussianbump black hole populations in the latest gravitational wave catalog, GWTC-3, estimating their co-location and separation. We
find a relatively low level of mixing, 3.1+5.0−3.1 % , between the power-law and Gaussian populations, compared to the percentage
of mergers containing… ▽ More

Submitted 16 August, 2024; originally announced August 2024.
Comments: 19 pages, 11 figures. Submitted to PRD

89. arXiv:2408.09011 [pdf, ps, other]

astro-ph.GA

nlin.CD

physics.comp-ph

Chaotic Dynamics in a Galactic Multipolar Halo with a Compact Primary
Authors: Yeasin Ali, Suparna Roychowdhury
Abstract: Observational evidence strongly supports the existence of a Super Massive Black Hole (SMBH) at the Galactic center,surrounded by dense stellar clusters. Modeling galactic centers with intricate structures like shells and rings pose challenges,
prompting the use of simplified models such as a spherical monopole potential with a multipolar halo mass distribution. Thisapproach, employing a multipol… ▽ More
Submitted 16 August, 2024; originally announced August 2024.
Comments: 16 pages, 7 figures

90. arXiv:2408.09001 [pdf, other]

astro-ph.SR

astro-ph.GA

Testing the sources of the peculiar abundances in globular clusters
Authors: Ricardo J. Vaca, Ivan Cabrera-Ziri, Gladis Magris C., Nate Bastian, Maurizio Salaris
Abstract: This work aims to analyze some of the polluters proposed in the self-enrichment scenarios put forward to explain themultiple populations in globular clusters (GCs), extending previous studies. Three scenarios with different polluter stars were
tested: asymptotic giant branch stars, high-mass interacting binaries, and fast rotating massive stars. With abundance data
available from the APOGEE surve… ▽ More
Submitted 16 August, 2024; originally announced August 2024.

91. arXiv:2408.08962 [pdf, other]

astro-ph.GA

A Dusty Dawn: Galactic Dust Buildup at z ≳ 5Authors: Caleb R. Choban, Samir Salim, Dušan Kereš, Christopher C. Hayward, Karin M. Sandstrom
Abstract: Over the last decade, the Atacama Large Millimeter Array (ALMA) has revealed massive, extremely dusty star-forming
galaxies at z ≳ 5 , and the James Webb Space Telescope (JWST) is primed to uncover even more information about them. These
extreme observations both need dust evolution theory to provide context and are excellent benchmarks to test this theory.
Here, we investigate the evolution… ▽ More
Submitted 16 August, 2024; originally announced August 2024.
Comments: 22 pages, 12 figures, submitted to MNRAS. Comments welcome

92. arXiv:2408.08958 [pdf, other]

astro-ph.EP

astro-ph.SR

Microphysical Prescriptions for Parameterized Water Cloud Formation on Ultra-cool Substellar
Objects
Authors: James Mang, Caroline V. Morley, Tyler D. Robinson, Peter Gao
Abstract: Water must condense into ice clouds in the coldest brown dwarfs and exoplanets. When they form, these icy clouds
change the emergent spectra, temperature structure, and albedo of the substellar atmosphere. The properties of clouds aregoverned by complex microphysics but these complexities are often not captured by the simpler parameterized cloud models
used in climate models or retrieval models.… ▽ More
Submitted 16 August, 2024; originally announced August 2024.
Comments: 20 pages, 19 figures. Accepted for publication in ApJ

93. arXiv:2408.08947 [pdf, other]

hep-phastro-ph.GA

astro-ph.HE

hep-th

Cosmic-Ray Cooling in Active Galactic Nuclei as a New Probe of Inelastic Dark Matter
Authors: R. Andrew Gustafson, Gonzalo Herrera, Mainak Mukhopadhyay, Kohta Murase, Ian M. Shoemaker
Abstract: We present a novel way to probe inelastic dark matter using cosmic-ray (CR) cooling in active galactic nuclei (AGNs).
Dark matter (DM) in the vicinity of supermassive black holes may scatter off CRs, resulting in the rapid cooling of CRs for
sufficiently large cross sections. This in turn can alter the high-energy neutrino and gamma-ray fluxes detected from thesesources. We show that AGN cooling… ▽ More
Submitted 16 August, 2024; originally announced August 2024.
Comments: 6 pages, 4 figures. Supplementary Material: 6 pages, 5 figures

94. arXiv:2408.08873 [pdf, other]

astro-ph.EP

astro-ph.IM

cs.LG

Accelerating Giant Impact Simulations with Machine Learning
Authors: Caleb Lammers, Miles Cranmer, Sam Hadden, Shirley Ho, Norman Murray, Daniel Tamayo
Abstract: Constraining planet formation models based on the observed exoplanet population requires generating large
samples of synthetic planetary systems, which can be computationally prohibitive. A significant bottleneck is simulating the
giant impact phase, during which planetary embryos evolve gravitationally and combine to form planets, which maythemselves experience later collisions. To accelerate gi… ▽ More
Submitted 16 August, 2024; originally announced August 2024.
Comments: 15 pages, 7 figures, 1 table. Easy-to-use API available at https://github.com/dtamayo/spock

95. arXiv:2408.08863 [pdf, other]

astro-ph.GA

Instability and Evolution of Shocked Clouds Formed by Orthogonal Collisions between Magnetized
Filamentary Molecular Clouds
Authors: Raiga Kashiwagi, Kazunari Iwasaki, Kohji Tomisaka
Abstract: Filamentary molecular clouds are recognized as primary sites for the formation of stars. Specifically, regions
characterized by the overlapping point of multiple filaments, known as hub regions, often associated with active star formation.
However, the formation mechanism of this hub structure is not well understood. Therefore, to understand the formation
mechanism and star formation in hub struct… ▽ More
Submitted 16 August, 2024; originally announced August 2024.
Comments: 24 pages, 9 figures, accepted for publication in ApJ

96. arXiv:2408.08735 [pdf, other]

astro-ph.GA

GPS in the cosmos
Authors: Gopal-Krishna
Abstract: This note chronicles the early steps and incidences from over four decades ago, that gave a kickstart to research on
the now prominent subclass of radio galaxies, called 'Gigahertz-Peaked-Spectrum' (GPS) sources. In this first-hand account, theorigin of the acronym 'GPS' in this context is retraced, along with the first crucial steps and the major milestones set in courseof evolution of this now… ▽ More
Submitted 16 August, 2024; originally announced August 2024.
Comments: 29 pages and 3 Annexure, submitted to Current Science

97. arXiv:2408.08611 [pdf, other]

astro-ph.GA

astro-ph.EP

astro-ph.SR

Semi-empirical Estimates of the Cosmic Planet Formation Rate
Authors: Andrea Lapi, Lumen Boco, Francesca Perrotta, Marcella Massardi
Abstract: We devise and exploit a data-driven, semi-empirical framework of galaxy formation and evolution, coupling it torecipes for planet formation from stellar and planetary science, to compute the cosmic planet formation rate, and theproperties of the planets' preferred host stellar and galactic environments. We also discuss how the rates and formation sitesof planets are affected when considering th… ▽ More
Submitted 16 August, 2024; originally announced August 2024.
Comments: 20 pages, 9 figures. Accepted by Galaxies

98. arXiv:2408.08608 [pdf, other]

astro-ph.GA

Formation of the interstellar sugar precursor, (Z)-1,2-ethenediol, through radical reactions on dust
grainsAuthors: Juan Carlos del Valle, Pilar Redondo, Johannes Kästner, Germán Molpeceres
Abstract: In recent years, the continued detection of complex organic molecules of prebiotic interest has refueled the interest
on a panspermic origin of life. The prebiotic molecule glyceraldehyde is proposed to be formed from (Z)-1,2-ethenediol, amolecule recently detected towards the G+0.693-0.027 molecular cloud at the galactic center. In this work, we computationallysimulate the formation of (Z)-1,2-… ▽ More
Submitted 16 August, 2024; originally announced August 2024.
Comments: This version is the unedited accepted version in the Astrophysical Journal

About

Contact

Copyright

Web Accessibility Assistance

Help

Subscribe

Privacy Policy

arXiv Operational Status
Get status notifications via

email orslack