bluuebunny/crossref_metadata_2025_split huggingface dataset:
Asteroseismology of the Nearby K Dwarf σ Draconis Using the Keck Planet Finder and TESS
Authors: Hon Marc , Huber Daniel , Li Yaguang , Metcalfe Travis S. , Bedding Timothy R. , Ong Joel , Chontos Ashley , Rubenzahl Ryan , Halverson Samuel , García Rafael A. , Kjeldsen Hans , Stello Dennis , Hey Daniel R. , Campante Tiago , Howard Andrew W. , Gibson Steven R. , Rider Kodi , Roy Arpita , Baker Ashley D. , Edelstein Jerry , Smith Chris , Fulton Benjamin J. , Walawender Josh , Brodheim Max , Brown Matt , Chan Dwight , Dai Fei , Deich William , Gottschalk Colby , Grillo Jason , Hale Dave , Hill Grant M. , Holden Bradford , Householder Aaron , Isaacson Howard , Ishikawa Yuzo , Jelinsky Sharon R. , Kassis Marc , Kaye Stephen , Laher Russ , Lanclos Kyle , Lee Chien-Hsiu , Lilley Scott , McCarney Ben , Miller Timothy N. , Payne Joel , Petigura Erik A. , Poppett Claire , Raffanti Michael , Rockosi Constance , Sanford Dale , Schwab Christian , Shaum Abby P. , Sirk Martin M. , Smith Roger , Thorne Jim , Valliant John , Vandenberg Adam , Wang Shin Ywan , Wishnow Edward , Wold Truman , Yeh Sherry , Baker Ashley , Basu Sarbani , Bedell Megan , Cegla Heather M. , Crossfield Ian , Dressing Courtney , Dumusque Xavier , Knutson Heather , Mawet Dimitri , O’Meara John , Stefánsson Guđmundur , Teske Johanna , Vasisht Gautam , Wang Sharon Xuesong , Weiss Lauren M. , Winn Joshua N. , Wright Jason T. 
Published: October 2024

Abstract
Asteroseismology of dwarf stars cooler than the Sun is very challenging owing to the low amplitudes and rapid timescales of oscillations. Here we present the asteroseismic detection of solar-like oscillations at 4-minute timescales (

ν
max

∼
4300

μHz) in the nearby K dwarf σ Draconis using extreme-precision Doppler velocity observations from the Keck Planet Finder and 20 s cadence photometry from NASA’s Transiting Exoplanet Survey Satellite. The star is the coolest dwarf star to date with both velocity and luminosity observations of solar-like oscillations, having amplitudes of 5.9 ± 0.8 cm s−1 and 0.8 ± 0.2 ppm, respectively. These measured values are in excellent agreement with established luminosity−velocity amplitude relations for oscillations and provide further evidence that mode amplitudes for stars with T
eff < 5500 K diminish in scale following an (L/M)1.5 relation. By modeling the star’s oscillation frequencies from photometric data, we measure an asteroseismic age of 4.5 ± 0.9 (ran) ± 1.2 (sys) Gyr. The observations demonstrate the capability of next-generation spectrographs and precise space-based photometry to extend observational asteroseismology to nearby cool dwarfs, which are benchmarks for stellar astrophysics and prime targets for directly imaging planets using future space-based telescopes.
Probing Cold-to-temperate Exoplanetary Atmospheres: The Role of Water Condensation on Surface Identification with JWST
Authors: Huang 黄 Ziyu 子钰 , Yu 余 Xinting 馨婷 , Tsai Shang-Min , Moses Julianne I. , Ohno Kazumasa , Krissansen-Totton Joshua , Zhang Xi , Fortney Jonathan J. 
Published: October 2024

Abstract
Understanding the surface temperature and interior structure of cold-to-temperate sub-Neptunes is critical for assessing their habitability, yet direct observations are challenging. In this study, we investigate the impact of water condensation on the atmospheric compositions of sub-Neptunes, focusing on the implications for James Webb Space Telescope (JWST) spectroscopic observations. By modeling the atmospheric photochemistry of two canonical sub-Neptunes, K2-18 b and LHS 1140 b, both with and without water condensation and with and without thick atmospheres, we demonstrate that water condensation can significantly affect the predicted atmospheric compositions. This effect is driven by oxygen depletion from the condensation of water vapor and primarily manifests as an increase in the C/O ratio within the photochemically active regions of the atmosphere. This change in composition particularly affects planets with thin H2-dominated atmospheres, leading to a transition in dominant nitrogen and carbon carriers from N2 and oxygen-rich species like CO/CO2 toward heavier hydrocarbons and nitriles. While our models do not fully account for the loss mechanisms of these higher-order species, such molecules can go on to form more refractory molecules or hazes. Planets with thin H2-rich atmospheres undergoing significant water condensation are thus likely to exhibit very hazy atmospheres. The relatively flat JWST spectra observed for LHS 1140 b could be consistent with such a scenario, suggesting a shallow surface with extensive water condensation or a high atmospheric C/O ratio. Conversely, the JWST observations of K2-18 b are better aligned with a volatile-rich mini-Neptune with a thick atmosphere.
pop-cosmos: Scaleable Inference of Galaxy Properties and Redshifts with a Data-driven Population Model
Authors: Thorp Stephen , Alsing Justin , Peiris Hiranya V. , Deger Sinan , Mortlock Daniel J. , Leistedt Boris , Leja Joel , Loureiro Arthur 
Published: October 2024

Abstract
We present an efficient Bayesian method for estimating individual photometric redshifts and galaxy properties under a pretrained population model (pop-cosmos) that was calibrated using purely photometric data. This model specifies a prior distribution over 16 stellar population synthesis (SPS) parameters using a score-based diffusion model, and includes a data model with detailed treatment of nebular emission. We use a GPU-accelerated affine-invariant ensemble sampler to achieve fast posterior sampling under this model for 292,300 individual galaxies in the COSMOS2020 catalog, leveraging a neural network emulator (Speculator) to speed up the SPS calculations. We apply both the pop-cosmos population model and a baseline prior inspired by Prospector-α, and compare these results to published COSMOS2020 redshift estimates from the widely used EAZY and LePhare codes. For the ∼12,000 galaxies with spectroscopic redshifts, we find that pop-cosmos yields redshift estimates that have minimal bias (∼10−4), high accuracy (σ
MAD = 7 × 10−3), and a low outlier rate (1.6%). We show that the pop-cosmos population model generalizes well to galaxies fainter than its r < 25 mag training set. The sample we have analyzed is ≳3× larger than has previously been possible via posterior sampling with a full SPS model, with average throughput of 15 GPU-sec per galaxy under the pop-cosmos prior, and 0.6 GPU-sec per galaxy under the Prospector prior. This paves the way for principled modeling of the huge catalogs expected from upcoming Stage IV galaxy surveys.
Pulling Back the Curtain on Shocks and Star Formation in NGC 1266 with Gemini-NIFS
Authors: Otter Justin Atsushi , Alatalo Katherine , Rowlands Kate , McDermid Richard M. , Davis Timothy A. , Federrath Christoph , French K. Decker , Heckman Timothy , Ogle Patrick , Kakkad Darshan , Luo Yuanze , Nyland Kristina , Tripathi Akshat , Patil Pallavi , Petric Andreea , Smercina Adam , Skarbinski Maya , Lanz Lauranne , Larson Kristin , Appleton Philip N. , Aalto Susanne , Olander Gustav , Sazonova Elizaveta , Smith J. D. T. 
Published: October 2024

Abstract
We present Gemini near-infrared integral field spectrograph K-band observations of the central 400 pc of NGC 1266, a nearby (D ≈ 30 Mpc) post-starburst galaxy with a powerful multiphase outflow and a shocked interstellar medium. We detect seven H2 rovibrational emission lines excited thermally to T ∼ 2000 K, and weak Brγ emission, consistent with a fast continuous shock (or C-shock). With these bright H2 lines, we observe the spatial structure of the shock with an unambiguous tracer for the first time. The Brγ emission is concentrated in the central ≲100 pc, indicating that any remaining star formation in NGC 1266 is in the nucleus, while the surrounding cold molecular gas has little ongoing star formation. Though it is unclear what fraction of this Brγ emission is from star formation or the active galactic nuclei (AGN), assuming it is entirely due to star formation we measure an instantaneous star formation rate of 0.7 M
⊙ yr−1, though the star formation rate may be significantly higher in the presence of additional extinction. NGC 1266 provides a unique laboratory to study the complex interactions between AGN, outflows, shocks, and star formation, all of which are necessary to unravel the evolution of the post-starburst phase.
Follow-up Timing of 12 Pulsars Discovered in Commensal Radio Astronomy FAST Survey
Authors: Zhao D. , Yuan J. P. , Wang N. , Li D. , Wang P. , Xue M. Y. , Zhu W. W. , Miao C. C. , Yan W. M. , Wang J. B. , Yao J. M. , Wu Q. D. , Wang S. Q. , Sun S. N. , Kou F. F. , Chen Y. T. , Dang S. J. , Feng Y. , Liu Z. J. , Miao X. L. , Meng L. Q. , Yuan M. , Niu C. H. , Niu J. R. , Qian L. , Wang S. , Xie X. Y. , Xiao Y. F. , Yue Y. L. , You S. P. , Yu X. H. , Zhao R. S. , Yuen R. , Zhou X. , Zhang L. , Xie M. , Li Y. X. , Wang Y. B. , Luo Z. K. , Gan Z. Y. , Sun Z. Y. , Chi M. M. , Wang C. J. 
Published: October 2024

Abstract
We present phase-connected timing ephemerides, polarization pulse profiles, and Faraday rotation measurements of 12 pulsars discovered by the Five-hundred-meter Aperture Spherical radio Telescope (FAST) in the Commensal Radio Astronomy FAST Survey. The observational data for each pulsar span at least 1 yr. Among them, PSR J1840+2843 shows subpulse drifting, and five pulsars are detected to exhibit pulse nulling phenomena. PSR J0640−0139 and PSR J2031−1254 are isolated millisecond pulsars (MSPs) with stable spin-down rates (

P

̇

) of 4.8981(6) × 10−20 s s−1 and 6.01(2) × 10−21 s s−1, respectively. Additionally, one pulsar (PSR J1602−0611) is in a neutron star−white dwarf (WD) binary system with an 18.23-day orbit and a companion of ≤0.65 M
⊙. PSR J1602−0611 has a spin period, companion mass, and orbital eccentricity that are consistent with the theoretical expectations for MSP−helium WD (He WD) systems. Therefore, we believe that it might be an MSP−He WD binary system. The locations of PSR J1751−0542 and PSR J1840+2843 on the

P
−

P

̇

diagram are beyond the traditional death line. This indicates that FAST has discovered some low-

E

̇

pulsars, contributing new samples for testing pulsar radiation theories. We estimated the distances of these 12 pulsars based on NE2001 and YMW16 electron density models, and our work enhances the data set for investigating the electron density model of the Galaxy.
The Diffusion Tensor of Protons at 1 au: Comparing Simulation, Observation, and Theory
Authors: Els P. L. , Engelbrecht N. E. , Lang J. T. , Strauss R. D. 
Published: October 2024

Abstract
The natural variation in plasma parameters observed at 1 au can lead to a variation in transport parameters, such as diffusion and drift coefficients, for energetic charged particles of solar and galactic origin. Given the importance of these parameters to particle transport studies, this variation is investigated through test particle simulations over a range of energies in the presence of simulated turbulence with properties corresponding to an ensemble of observed turbulence conditions at Earth. The resulting transport coefficients are then compared with observational estimates from the literature, as well as the predictions of several scattering theories. Parallel and perpendicular mean free paths are shown to vary widely, for the former in agreement with prior observational estimates, but not for the latter. Furthermore, a large disparity between the predictions of theory and the simulation results is noted for the perpendicular mean free path. As such, these results indicate that particle transport studies, particularly predictive ones, need to take into account this natural variation in transport coefficients.
Hints of a Sulfur-rich Atmosphere around the 1.6 R
⊕ Super-Earth L98-59 d from JWST NIRspec G395H Transmission Spectroscopy
Authors: Gressier Amélie , Espinoza Néstor , Allen Natalie H. , Sing David K. , Banerjee Agnibha , Barstow Joanna K. , Valenti Jeff A. , Lewis Nikole K. , Birkmann Stephan M. , Challener Ryan C. , Manjavacas Elena , Alves de Oliveira Catarina , Crouzet Nicolas , Beck Tracy. L 
Published: October 2024

Abstract
Detecting atmospheres around planets with a radius below 1.6 R
⊕, commonly referred to as rocky planets, has proven to be challenging. However, rocky planets orbiting M dwarfs are ideal candidates due to their favorable planet-to-star radius ratio. Here, we present one transit observation of the Super-Earth L98-59 d (1.58 R
⊕ and 2.31 M
⊕), at the limit of rocky/gas-rich, using the JWST NIRSpec G395H mode covering the 2.8–5.1 μm wavelength range. The extracted transit spectrum from a single transit observation deviates from a flat line by 2.6σ–5.6σ, depending on the data reduction and retrieval setup. The hints of an atmospheric detection are driven by a large absorption feature between 3.3 and 4.8 μm. A stellar contamination retrieval analysis rejected the source of this feature as being due to stellar inhomogeneities, making the best fit an atmospheric model including sulfur-bearing species, suggesting that the atmosphere of L98-59 d may not be at equilibrium. This result will need to be confirmed by the analysis of the second NIRSpec G395H visit in addition to the NIRISS SOSS transit observation.
No Thick Atmosphere on the Terrestrial Exoplanet Gl 486b
Authors: Weiner Mansfield Megan , Xue Qiao , Zhang Michael , Mahajan Alexandra S. , Ih Jegug , Koll Daniel , Bean Jacob L. , Coy Brandon Park , Eastman Jason D. , Kempton Eliza M.-R. , Kite Edwin S. 
Published: October 2024

Abstract
A primary science goal for JWST is to detect and characterize the atmospheres of terrestrial planets orbiting M dwarfs (M-Earths). The existence of atmospheres on M-Earths is highly uncertain because their host stars’ extended history of high X-ray and ultraviolet irradiation may act to completely remove their atmospheres. We present two JWST secondary eclipse observations of the M-Earth Gl 486b (also known as GJ 486b) between 5 and 12 μm. We combined these observations with a precise analysis of the host star parameters to derive a planetary dayside temperature of T
p = 865 ± 14 K. We compared this temperature to the maximum expected temperature for a zero albedo, zero heat redistribution bare rock and derived a temperature ratio of

R
=

T

p
,
dayside

T

p
,
max

=
0.97
±
0.01

. This value is consistent with an airless body with a slight nonzero albedo or a thin atmosphere with <1% H2O or <1 ppm CO2. However, it is inconsistent with an Earth- or Venus-like atmosphere, and the spectrum shows no clear emission or absorption features. Additionally, our observations are inconsistent with the water-rich atmospheric scenario allowed by previous transit observations and suggest the transmission spectrum was instead shaped by stellar contamination. Given the potential for atmospheric escape throughout the system’s ≥6.6 Gyr lifetime, we conclude that the observations are likely best explained by an airless planet. This result is the most precise measurement yet of terrestrial exoplanet thermal emission with JWST, which places a strong constraint on the position of the “cosmic shoreline” between airless bodies and those with atmospheres.
GRANDMA Observations of SN 2023wrk, a Luminous Type Ia Supernova with Significant Unburned Carbon in the Outer Ejecta
Authors: Andrade Cristina , Duverne Pierre-Alexandre , Liu Jialian , Navarete Felipe , Abdelaziz Abdelaziz E. , Abdelkareem Mohamed , Abdi Ilmah , Aboueisha Mohamed , Adami Christophe , Agayeva Shabnam , Aivazyan Vova , de Almeida Leandro , Akl Dalya , Antier Sarah , Arnaud Yvan , Ata Saad A. , Badawy Wageeh A. , Bai Chunhai , Bendary Reda , Benkhaldoun Zouhair , Borrot Kevin , Broens Eric , Cai Yongzhi , Clerget Olivier , Corradi Wagner , Coughlin Michael W. , Delaunoy Nicolas , Dubois Franky , Ducoin Jean-Grégoire , Elhosseiny Eslam , Esposito Thomas M. , Esamdin Ali , Foulon Pascal , Foulon Roland , Freeberg Michael , Galdies Charles , Gokuldass Priyadarshini , Guillet Bruno , Hamed Gamal M. , Haremza Bruno , Hello Patrice , Hendy Yasser , Huth Patrick , Inasaridze Raguli , Iskandar Abdusamatjan , Kaeouach Aziz , Kamel Tarek M. , Karpov Sergey , Kneip Raymond , Kochiashvili Nino , Kuossari Petri , Li Liping , Li Xin , Liu Jinzhong , Lorber Markus , Mabrouk Raouf H. , Marchais Denis , Maris Elisabeth , Márquez Isabel , Mašek Martin , Ménard Roger , Meneghelli Nicola , Mitchell Mike , Noysena Kanthanakorn , Odeh Mohammad , Ono Wataru , Parent Gérard , Parker Bruce , Peloton Julien , Popowicz Adam , Pradier Thierry , Price Stephen , Pyshna Oleksandra , Rajabov Yodgor , Saibi Fadi , Saibi Sophie , Saint-Gelais Denis , Sasaki Nelio , Serrau Marc , Shimizu Masao , Shokry Ahmed , Simon Andrii , Sokoliuk Oleksii , Takey Ali , Tanasan Manasanun , Tillayev Yusuf , Di Tommaso Giuseppe , Tosta e Melo Iara , Turpin Damien , Wang Xiaofeng , Wang Zhenyu , Zead Ibrahim , Zhang Jujia 
Published: October 2024

Abstract
First detected on 2023 November 4 by the Gravitational-wave Optical Transient Observer, SN 2023wrk is a Type Ia Supernova at 40 Mpc, with significant unburned carbon in the outer ejecta. In this note, we present photometric and spectroscopic observations and analysis conducted by the Global Rapid Advanced Network Devoted to the Multi-messenger Addict over a 115 days period, which includes 78 days of measurements. The observations were contributed by both amateur and professional astronomers. J. Liu et al. analyzed the physical processes involved, and compared the evolution of color and spectral lines. We conclude that SN 2023wrk is the second 1999aa-like object with strong carbon absorption lines that has ever been found, which enriches our understanding of the subclass of 1999aa-like SNe.
One “True” Meaning
Authors: Mankowitz Poppy 
Published: October 2024

Some words express different meanings in different contexts, such as “bank” and “I.” Linguistic alethic pluralists claim that “true” is another such word. This is a surprising thesis that holds implications for debates about the nature of truth. Yet it is in need of careful elaboration and evaluation. I describe several versions of linguistic alethic pluralism, alongside tests that natural language theorists use to identify different types of meaning variation. I also consider empirical studies that have recently targeted the use of “true.” I conclude that there is currently no evidence for linguistic alethic pluralism, and unlikely to be any forthcoming.
On the Epistemic Value of Reflection
Authors: Ambardekar Pranav 
Published: October 2024

Against philosophical orthodoxy, Kornblith (2012) has mounted an empirically grounded critique of the epistemic value of reflection. In this paper, I argue that this recent critique fails even if we concede that the empirical facts are as Kornblith says they are, and assume that reliability is the only determinant of epistemic value. The critique fails because it seeks to undermine the reliability of reflection in general but targets only one of its variants, namely individual reflection, while neglecting social reflection. This critique comprises two arguments which have a common structure: they both impose a requirement on the reliability of reflection, but deny, on empirical grounds, that the requirement is met. One argument imposes an introspection requirement, which I reject as superfluous. I show how reflection can proceed without introspection. The other argument imposes an efficacy requirement. This requirement concerns whether reflection is causally efficacious i.e., whether it leads us to change our minds for the better. I accept this as a genuine requirement. Even if we concede that individual reflection fails to meet this requirement, I argue that we have not been given sufficient evidence to believe that social reflection is bound to violate this requirement. Furthermore, my analysis of the conditions under which social reflection works best provides us with prima facie grounds for optimism regarding the reliability of social reflection. Ultimately, then, these arguments fail to undermine the epistemic value of reflection in general.
The Imperialism of Desert
Authors: Malcai Ofer , Segev Re'em 
Published: October 2024

What is the relation between desert and other values such as equality, priority for the worse off, and utility? According to the common (pluralist) view, desert and these other values reflect distinct concerns: some are about distributive justice, some about retributive justice, and some (most clearly, utility) are not concerned with justice at all. However, another (monistic) view holds that while desert is a basic value, other values are merely derived from it. This controversy is relevant, for instance, to allocative decisions and criminal punishment, where we need to know if other values should be balanced against desert. Yet, despite its theoretical significance and practical importance, this topic is underexplored. Aiming to fill this gap, we consider the arguments for and against the competing views. We demonstrate that the interaction between desert and other values raises a difficult dilemma: there are powerful arguments for and against both the pluralistic and the monistic accounts of desert. Indeed, we suggest that this dilemma is due to the unique nature of desert. Unlike other values, desert, especially its more robust forms, does not only sometimes conflict with competing considerations that favor different courses of actions, but rather seems to dispel other values even as pro tanto ones.
L’État dévoreur et les communautés polycentrées du patrimoine
Authors: Condevaux Aurélie 
Published: October 2024

Le propos développé dans cet article se place dans le sillage d’une discussion ouverte par le numéro spécial de l’Espace Géographique coordonné par B. Debarbieux et E. Hertz sur la « patrimonialisation et les politiques de l’échelle à l’Unesco », et de l’article de Nicolas Adell publié à ce sujet dans Terrain. Tout en rappelant la portée heuristique de l’analyse scalaire, l’article en examine également quelques limites et compléments possibles. En particulier, il argumente que prendre en compte la dimension transnationalisée et/ou l’organisation réticulaire des « communautés » patrimoniales est dans certains cas une nécessité pour saisir les jeux d’acteurs en matière de PCI, au-delà de la relation tripartite communautés/État/Unesco.
Quand l’individu « prend position » dans le processus de patrimonialisation
Authors: Debarbieux Bernard 
Published: October 2024

La note participe d’un échange portant sur un dossier de textes publié par L’Espace géographique portant sur les échelles du patrimoine et de la patrimonialisation. En réaction à trois commentaires produits sur ce dossier, elle développe quelques idées sur les façons de prendre en compte la contribution des individus dans un processus, la patrimonialisation, que l’on tend à ramener toujours à des collectifs. La note promeut au passage l’idée que les actions individuelles en la matière méritent d’être comprises comme des « prises de position ».
La série semi-feuilletonnante et son système de personnages : espace de violence et espace d’accueil
Authors: Hatchuel Sarah , Cornillon Claire 
Published: October 2024

Dans un article intitulé « Analysing Semi-Serialized Television Fictions: The Ethical Stakes of Narrative Structures », paru dans la revue SERIES en 2020, nous avons montré que les séries semi-feuilletonnantes thématisent leurs propres négociations narratives (entre leurs aspects épisodiques et feuilletonnants) au sein du monde de l’histoire et, même si elles construisent des arcs sériels forts, maintiennent l’importance du statut de l’épisode comme métaphore des êtres humains dans leurs individualités et leurs spécificités mêmes. Cet article permet de prolonger cette réflexion sur l’éthique des formes sérielles amorcée de deux manières : dans un premier temps, l’analyse de Grey’s Anatomy montrera que la forme semi-feuilletonnante formulaire peut engendrer un espace moins éthique qu’attendu ; dans un second temps, l’analyse de The Last of Us révèlera que la forme semi-feuilletonnante épisodique peut ouvrir un espace d’accueil à la fois original et touchant, qui décentre le regard.