cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Evidence for Variable Accretion onto PDS 70 c and Implications for Protoplanet Detections
Creators: name: Zhou, Yifan
name: Bowler, Brendan P.
name: Sanghi, Aniket
name: Marleau, Gabriel-Dominique
name: Takasao, Shinsuke
name: Aoyama, Yuhiko
name: Hasegawa, Yasuhiro
name: Thanathibodee, Thanawuth
name: Uyama, Taichi
name: Hashimoto, Jun
name: Wagner, Kevin
name: Calvet, Nuria
name: Demars, Dorian
name: Wu, Ya-Lin
name: Biddle, Lauren I.
name: Haffert, Sebastiaan
name: Bryan, Marta L.
Publisher: name: arXiv
Year: 2025
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Understanding the processes of planet formation and accretion in young systems is essential to unraveling the initial conditions of planetary systems. The PDS 70 system, which hosts two directly imaged protoplanets, provides a unique laboratory for studying these phenomena, particularly through H-alpha emission a commonly used accretion tracer. We present multi-epoch observations and examine the variability in accretion signatures within this system, focusing on PDS 70 b and c. Using Hubble Space Telescope narrowband H-alpha imaging from 2020 and 2024, we achieve high signal-to-noise ratio detections of these planets and reveal significant changes in H-alpha flux. For PDS 70 c, the H-alpha flux more than doubled between 2020 and 2024. The trend is consistent with the one identified in recently published MagAO-X data, further confirming that PDS 70 c has become significantly brighter in H between 2023 March and 2024 May. The observed variability suggests dynamic accretion processes, possibly modulated by circumplanetary disk properties or transient accretion bursts. High-amplitude variability in PDS 70 c motivates simultaneous monitoring of multiple accretion tracers to probe the mechanisms of mass growth of gas giant planets. We quantify the impact of variability on the detectability of protoplanets in imaging surveys and emphasize the need for continued and regular monitoring to accurately assess the occurrence and characteristics of young, forming planets.
description: See Figure 1 for new HST/WFC3 detections of PDS 70 b and c, Figures 2 and 3 for confirming the H-alpha variability of PDS 70 c. Published on ApJ Letters
Nonmonotone slip problem for miscible liquids
Creators: name: Szafraniec, Paweł
name: Migórski, Stanisław
Publisher: name: arXiv
Year: 2019
Subjects: subject: Mathematical Physics (math-ph)
subject: Analysis of PDEs (math.AP)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: In this paper we prove the existence and uniqueness of a solution to the nonstationary two dimensional system of equations describing miscible liquids with nonsmooth, multivalued and nonmonotone boundary conditions of subdifferential type. We employ the regularized Galerkin method combined with results from the theory of hemivariational inequalities.
description: 17 pages
Kinetic Regimes and Cross-Over Times in Many-Particle Reacting Systems
Creators: name: O'Shaughnessy, Ben
name: Vavylonis, Dimitrios
Publisher: name: arXiv
Year: 1998
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We study kinetics of single species reactions ("A+A -> 0") for general local reactivity Q and dynamical exponent z (rms displacement x_t ~ t^{1/z}.) For small molecules z=2, whilst z=4,8 for certain polymer systems. For dimensions d above the critical value d_c=z, kinetics are always mean field (MF). Below d_c, the density n_t initially follows MF decay, n_0 - n_t ~ n_0^2 Q t. A 2-body diffusion-controlled regime follows for strongly reactive systems (Q>Qstar ~ n_0^{(z-d)/d}) with n_0 - n_t ~ n_0^2 x_t^d. For Q
description: 10 pages, 1 figure, uses bulk2.sty, minor changes, submitted to Europhysics Letters
Thyrsodium spruceanum Benth.
Creators: name: Molino, Jean-François
name: Sabatier, Daniel
name: Grenand, Pierre
name: Engel, Julien
name: Frame, Dawn
name: Delprete, Piero G.
name: Fleury, Marie
name: Odonne, Guillaume
name: Davy, Damien
name: Lucas, Eve J.
name: Martin, Claire A.
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Sapindales
Anacardiaceae
Thyrsodium
Thyrsodium spruceanum

description: [19] Thyrsodium spruceanum Benth.
 Hooker’s J. Bot. Kew Gard. Misc. 4: 17 (Bentham 1852). — Garuga spruceana (Benth.) Engl., Fl. Bras. [Martius] 12 (2): 286 [1 Sep. 1874] (Engler 1874).
 Thyrsodium schomburgkianum Benth., Hooker’s J. Bot. Kew Gard. Misc. 4: 18 (Bentham 1852). — Garuga schomburgkiana (Benth.) Engl., Fl. Bras. [Martius] 12 (2): 287 [1 Sep. 1874] (Engler 1874).
 Thyrsodium salzmannianum Benth., Hooker’s J. Bot. Kew Gard. Misc. 4: 18 (Bentham 1852). — Garuga schomburgkiana (Benth.) Engl. var. salzmanniana (Benth.) Engl., Fl. Bras. [Martius] 12 (2): 287 [1 Sep. 1874] (Engler 1874). — Thyrsodium schomburgkianum Benth. var. salzmannianum (Benth.) Engl., Monogr.Phan. [A.DC. & C.DC.] 4: 297 [Mar. 1883] (Engler 1883).
 Garuga gigantea Engl., Fl. Bras. [Martius] 12 (2): 288 [1 Sep. 1874] (Engler 1874). — Thyrsodium giganteum (Engl.) Engl., Monogr. Phan. [A.DC. & C.DC.] 4: 297 [Mar. 1883] (Engler 1883).
 Thyrsodium paraense Huber, Bull. Soc. Bot. Genève, sér. 2, 6: 183 [“1914” publ. 1915] (Huber 1915).
 Thyrsodium dasytrichum Sandwith, Bull. Misc. Inform. Kew 1932 (5): 210 [27 June 1932] (Sandwith 1932).
 NOTE. — One of five species whose relative density in tree communities likely indicative of pre-Columbian archeological sites in French Guiana (Molino et al. 2021).
VERNACULAR NAMES. — Pa: wakavu-kamwi • Wp: tãpẽlemiũ ’ɨ • Cr: karapa-oyak • Br: breu-de-leite.
 HERBARIUM DATA (FG). — 17 collections at CAY. Sel. exs.: J.-F. Molino & D. Sabatier 2436.
 INVENTORY DATA (FG). — 38 trees in 24 plots; Fmax = 1.1 %; dbhinv = 35.1 cm.
description: Published as part of Molino, Jean-François, Sabatier, Daniel, Grenand, Pierre, Engel, Julien, Frame, Dawn, Delprete, Piero G., Fleury, Marie, Odonne, Guillaume, Davy, Damien, Lucas, Eve J. & Martin, Claire A., 2022, An annotated checklist of the tree species of French Guiana, including vernacular nomenclature, pp. 345-903 in Adansonia (3) (3) 44 (26) on page 366, DOI: 10.5252/adansonia2022v44a26, http://zenodo.org/record/7458777
BMS4 Algebra, Its Stability and Deformations
Creators: name: Safari, H. R.
name: Sheikh-Jabbari, M. M.
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We continue analysis of \cite{Parsa:2018kys} and study rigidity and stability of the BMS4 algebra and its centrally extended version. We construct and classify the family of algebras which appear as deformations of BMS4 and in general find the four-parameter family of algebras W(a,b;\bar{a},\bar{b}) as a result of the stabilization analysis, where BMS4=W(-1/2,-1/2;-1/2,-1/2). We then study the W(a,b;\bar{a},\bar{b}) algebra, its maximal finite subgroups and stability for different values of the four parameters. We prove stability of the W(a,b;\bar{a},\bar{b}) family of algebras for generic values of the parameters. For special cases of (a,b)=(\bar{a},\bar{b})=(0,0) and (a,b)=(0,-1), (\bar{a},\bar{b})=(0,0) the algebra can be deformed. In particular we show that centrally extended W(0,-1;0,0) algebra can be deformed to an algebra which has three copies of Virasoro as a subalgebra. We briefly discuss these deformed algebras as asymptotic symmetry algebras and the physical meaning of the stabilization and implications of our result.
Anaxagorea acuminata
Creators: name: Molino, Jean-François
name: Sabatier, Daniel
name: Grenand, Pierre
name: Engel, Julien
name: Frame, Dawn
name: Delprete, Piero G.
name: Fleury, Marie
name: Odonne, Guillaume
name: Davy, Damien
name: Lucas, Eve J.
name: Martin, Claire A.
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Magnoliales
Annonaceae
Anaxagorea
Anaxagorea acuminata

description: [20] Anaxagorea acuminata (Dunal) A.DC.
 Mém. Soc. Phys. Genève 5: 211 (Candolle 1832). — Xylopia acuminata Dunal, Monogr. Anonac.: 122 [Aug.-Nov. 1817] (Dunal 1817). — Xylopicrum acuminatum (Dunal) Kuntze, Revis. Gen. Pl. 1: 8 [5 Nov. 1891] (Kuntze 1891).
 Anaxagorea multiflora R.E.Fr., Acta Horti Berg. 12 (1): 13 (Fries 1934).
VERNACULAR NAMES. — Ka: apelemu, omose tubulu • Wp: pina’ɨ piye, pina’ɨsili.
 HERBARIUM DATA (FG). — 17 collections at CAY. Sel. exs.: J.-B. Patris s.n. (type G-DC [G00201576]).
INVENTORY DATA (FG). — 1 tree, dbh = 11.5 cm.
description: Published as part of Molino, Jean-François, Sabatier, Daniel, Grenand, Pierre, Engel, Julien, Frame, Dawn, Delprete, Piero G., Fleury, Marie, Odonne, Guillaume, Davy, Damien, Lucas, Eve J. & Martin, Claire A., 2022, An annotated checklist of the tree species of French Guiana, including vernacular nomenclature, pp. 345-903 in Adansonia (3) (3) 44 (26) on page 366, DOI: 10.5252/adansonia2022v44a26, http://zenodo.org/record/7458777
Stability Within $T^2$-Symmetric Expanding Spacetimes
Creators: name: Berger, Beverly K.
name: Isenberg, James
name: Layne, Adam
Publisher: name: arXiv
Year: 2018
Subjects: subject: Analysis of PDEs (math.AP)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 35Q76, 83C05, 83C20

description: We prove a nonpolarised analogue of the asymptotic characterization of $T^2$-symmetric Einstein Flow solutions completed recently by LeFloch and Smulevici. In this work, we impose a condition weaker than polarisation and so our result applies to a larger class. We obtain similar rates of decay for the normalized energy and associated quantities for this class. We describe numerical simulations which indicate that there is a locally attractive set for $T^2$-symmetric solutions not covered by our main theorem. This local attractor is distinct from the local attractor in our main theorem, thereby indicating that the polarised asymptotics are unstable.
description: 19 pages, 5 figures
Thermodynamics of binary mixture glasses
Creators: name: Coluzzi, Barbara
name: Mezard, Marc
name: Parisi, Giorgio
name: Verrocchio, Paolo
Publisher: name: arXiv
Year: 1999
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: We compute the thermodynamic properties of the glass phase in a binary mixture of soft spheres. Our approach is a generalization to mixtures of the replica strategy, recently proposed by Mezard and Parisi, providing a first principle statistical mechanics computation of the thermodynamics of glasses. The method starts from the inter-atomic potentials, and translates the problem into the study of a molecular liquid. We compare uor analytical predictions to numerical simulations, focusing onto the values of the thermodynamic transition and the configurational entropy.
description: 28 pages, 8 figures, revised version, accepted for the publication in the Journal of Chemical Physics
Analysis of Recent Attacks based on Social Engineering Techniques
Creators: name: Sokolov, V. Y.
name: Korzhenko, O. Y.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: This paper attempts to strengthen the pursued research on social engineering (SE) threat identification, and control, by means of the author's illustrated classification, which includes attack types, determining the degree of possible harm to each types of possible, known attacks, countermeasures by types of threats that leads to loss of personal or corporate confidential information (user id, passwords, closed documentation). Further, this analytical study will become the starting point for deeper, practically oriented and tested research.
Anaxagorea brevipedicellata Timmerman
Creators: name: Molino, Jean-François
name: Sabatier, Daniel
name: Grenand, Pierre
name: Engel, Julien
name: Frame, Dawn
name: Delprete, Piero G.
name: Fleury, Marie
name: Odonne, Guillaume
name: Davy, Damien
name: Lucas, Eve J.
name: Martin, Claire A.
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Magnoliales
Annonaceae
Anaxagorea
Anaxagorea brevipedicellata

description: [21] Anaxagorea brevipedicellata Timmerman
 Proc. Kon. Ned. Akad.Wetensch.C 87 (3): 299 (Timmerman 1984).
 HERBARIUM DATA (FG). — 7 collections at CAY. Sel. exs.: R.A.A. Oldeman B-3553 (para-, CAY [CAY010466], P [P01960321]).
SIZE. — Up to 15 m tall (Maas & Westra 1985).
description: Published as part of Molino, Jean-François, Sabatier, Daniel, Grenand, Pierre, Engel, Julien, Frame, Dawn, Delprete, Piero G., Fleury, Marie, Odonne, Guillaume, Davy, Damien, Lucas, Eve J. & Martin, Claire A., 2022, An annotated checklist of the tree species of French Guiana, including vernacular nomenclature, pp. 345-903 in Adansonia (3) (3) 44 (26) on page 366, DOI: 10.5252/adansonia2022v44a26, http://zenodo.org/record/7458777
Three Years of High-Contrast Imaging of the PDS 70 b and c Exoplanets at Hα with MagAO-X: Evidence of Strong Protoplanet Hα Variability and Circumplanetary Dust
Creators: name: Close, Laird M.
name: Males, Jared R.
name: Li, Jialin
name: Haffert, Sebastiaan Y.
name: Long, Joseph D.
name: Hedglen, Alexander D.
name: Weinberger, Alycia J.
name: Follette, Kate
name: Apai, Daniel
name: Doyon, Rene
name: Foster, Warren
name: Gasho, Victor
name: Van Gorkom, Kyle
name: Guyon, Olivier
name: Kautz, Maggie Y.
name: Kueny, Jay
name: Lumbres, Jennifer
name: McLeod, Avalon
name: McEwen, Eden
name: Pavao, Clarissa
name: Pearce, Logan
name: Perez, Laura
name: Schatz, Lauren
name: Szulágyi, J.
name: Wagner, Kevin
name: Wu, Ya-Lin
Publisher: name: arXiv
Year: 2025
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We present 3 years of high-contrast imaging of the PDS 70 b and c accreting protoplanets with the new extreme AO system MagAO-X as part of the MaxProtoPlanetS survey of H$α$ protoplanets. In 2023 and 2024 our sharp (25-27 mas FWHM); well AO corrected (20-26% Strehl), deep (2-3.6hr) images detect compact (r~30 mas; r~3 au) circumplanetary disks (CPDs) surrounding both protoplanets. Starlight scattering off the dusty outer edges of these CPDs is the likely source of the bright compact continuum light detected within ~30 mas of both planets in our simultaneously obtained continuum 668 nm filter images. After subtraction of contaminating continuum and PSF residuals with pyKLIP ADI and SDI we obtained high-contrast ASDI H$α$ images of both planets in 2022, 2023 and 2024. We find the H$α$ line flux of planet b fell by (8.1$\pm$1.6)x10$^{-16}$ ergs/s/cm$^2$ a factor of 4.6 drop in flux from 2022 to 2023. In March 2024, planet b continued to be faint with just a slight 1.6x rise to an H$α$ line flux of (3.64$\pm$0.87)x10$^{-16}$ ergs/s/cm$^2$. For c we measure a significant increase of (2.74$\pm$0.51)x10$^{-16}$ ergs/s/cm$^2$ from 2023 to 2024 which is a factor of 2.3x increase. So both protoplanets have recently experienced significant H$α$ variability with ~1 yr sampling. In 2024, planet c is brighter than b: as c is brightening and b generally fading. We also tentatively detect one new point source "CC3" inside the inner disk (~49 mas; at PA~295 deg; 2024) with orbital motion roughly consistent with a ~5.6 au orbit.
description: 50 pages, 20 figures, published in January 2025 Astronomical Journal. NOTE Figure D1 has correct planetary mass accretion scale compared to published AJ version
Comparing Optical and Near Infrared Luminosity Functions
Creators: name: Wright, Edward L.
Publisher: name: arXiv
Year: 2001
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The Sloan Digital Sky Survey [SDSS] has measured an optical luminosity function for galaxies in 5 bands, finding 1.5 to 2.1 times more luminosity density than previous work. This note compares the SDSS luminosity density to two recent determinations of the near infrared luminosity function based on 2MASS data, and finds that an extrapolation of the SDSS results gives a 2.3 times greater near infrared luminosity density.
description: 7 pages Latex with 2 figures. ApJL in press
Additional file 1 of Feeding practices in 6–24-month-old children with chronic cholestatic liver diseases: a mixed-method study
Creators: name: Chen, Xiao
name: Wang, Jianshe
name: Lu, Yi
name: Xie, Xinbao
name: Gu, Ying
name: Latour, Jos M.
name: Zhang, Yuxia
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Neuroscience
subject: Biotechnology
subject: Ecology
subject: FOS: Biological sciences
subject: Cancer
subject: Mental Health
subject: Infectious Diseases
subject: FOS: Health sciences

description: Additional file 1. The scoring system of the infant and child feeding index for children aged 6–24 months.
Modeling star-planet interactions in far-out planetary and exoplanetary systems
Creators: name: Das, Srijan Bharati
name: Basak, Arnab
name: Nandy, Dibyendu
name: Vaidya, Bhargav
Publisher: name: arXiv
Year: 2018
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The outflowing magnetized wind from a host star shapes planetary and exoplanetary magnetospheres dictating the extent of its impact. We carry out three-dimensional (3D) compressible magnetohydrodynamic (MHD) simulations of the interactions between magnetized stellar winds and planetary magnetospheres corresponding to a far-out star-planet system, with and without planetary dipole obliquity. We identify the pathways that lead to the formation of a dynamical steady-state magnetosphere and find that magnetic reconnection plays a fundamental role in the process. The magnetic energy density is found to be greater on the night-side than that on the day-side and the magnetotail is comparatively more dynamic. Magnetotail reconnection events are seen to associated with stellar wind plasma injection into the inner magnetosphere. We further study magnetospheres with extreme tilt angles keeping in perspective the examples of Uranus and Neptune. High dipole obliquities may also manifest due to polarity excursions during planetary field reversals. We find that global magnetospheric reconnection sites change for large planetary dipole obliquity and more complex current sheet structures are generated. We discuss the implications of these findings for injection of interplanetary species and energetic particles into the inner magnetosphere, auroral activity and magnetospheric radio emission. This study is relevant for exploring star planet interactions in the solar and extra-solar systems.
description: 17 pages, 12 figures, 1 table
Analytic vortex solutions in an unusual Mexican hat potential
Creators: name: Theodorakis, Stavros
Publisher: name: arXiv
Year: 1997
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: We introduce an unusual Mexican hat potential, a piecewise parabolic one, and we show that its vortex solutions can be found analytically, in contrast to the case of the standard Psi^4 field theory.
description: 4 pages and 1 figure (missing in this version)
A Matter of Perspective(s): Contrasting Human and LLM Argumentation in Subjective Decision-Making on Subtle Sexism
Creators: name: Aoyagui, Paula Akemi
name: Stemmler, Kelsey
name: Ferguson, Sharon
name: Kim, Young-ho
name: Kuzminykh, Anastasia
Publisher: name: arXiv
Year: 2025
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: In subjective decision-making, where decisions are based on contextual interpretation, Large Language Models (LLMs) can be integrated to present users with additional rationales to consider. The diversity of these rationales is mediated by the ability to consider the perspectives of different social actors. However, it remains unclear whether and how models differ in the distribution of perspectives they provide. We compare the perspectives taken by humans and different LLMs when assessing subtle sexism scenarios. We show that these perspectives can be classified within a finite set (perpetrator, victim, decision-maker), consistently present in argumentations produced by humans and LLMs, but in different distributions and combinations, demonstrating differences and similarities with human responses, and between models. We argue for the need to systematically evaluate LLMs' perspective-taking to identify the most suitable models for a given decision-making task. We discuss the implications for model evaluation.
description: Accepted at CHI Conference on Human Factors in Computing Systems (CHI '25), April 26-May 1, 2025, Yokohama, Japan
Anaxagorea dolichocarpa Sprague & Sandwith
Creators: name: Molino, Jean-François
name: Sabatier, Daniel
name: Grenand, Pierre
name: Engel, Julien
name: Frame, Dawn
name: Delprete, Piero G.
name: Fleury, Marie
name: Odonne, Guillaume
name: Davy, Damien
name: Lucas, Eve J.
name: Martin, Claire A.
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Magnoliales
Annonaceae
Anaxagorea
Anaxagorea dolichocarpa

description: [22] Anaxagorea dolichocarpa Sprague & Sandwith
 Bull. Misc. Inform. Kew 1930 (10): 475 [4 Dec. 1930] (Sprague & Sandwith 1930).
 Anaxagorea megalophylla R.E.Fr., Acta Horti Berg. 12 (1): 20 (Fries 1934).
 Anaxagorea mutica R.E.Fr., Acta Horti Berg. 12 (1): 19 (Fries 1934).
VERNACULAR NAMES. — Pa: manig-kamwi, miret-kamwi • Ka: kuwe enekalɨ• Wp: sa’i melu ka’a • Cr: baton-zin • Br: envira-branca.
 HERBARIUM DATA (FG). — 180 collections at CAY. Sel. exs.: M.-F. Prévost & P. Grenand 996.
INVENTORY DATA (FG). — 43 trees in 27 plots; Fmax <1 %; dbhinv = 13.4 cm.
description: Published as part of Molino, Jean-François, Sabatier, Daniel, Grenand, Pierre, Engel, Julien, Frame, Dawn, Delprete, Piero G., Fleury, Marie, Odonne, Guillaume, Davy, Damien, Lucas, Eve J. & Martin, Claire A., 2022, An annotated checklist of the tree species of French Guiana, including vernacular nomenclature, pp. 345-903 in Adansonia (3) (3) 44 (26) on page 366, DOI: 10.5252/adansonia2022v44a26, http://zenodo.org/record/7458777
Tutor notes for ITE workshop Neuroscience for Critical Consumers Version 2.1
Creators: name: McMahon, Kendra
name: Etchells, Peter
Publisher: name: BathSPAdata
Year: 2019
Subjects: subject: 130313 Teacher Education and Professional Development of Educators
subject: FOS: Educational sciences
subject: Education
subject: Neuroscience

description: These tutor notes explain how to use teaching/learning resources for trainee teachers to lead a workshop: Critical Consumers of Neuroscience.

This resource is an outcome of a wider project: Enhancing the Learning Sciences in Initial Teacher Education.
Ultrametricity in 3D Edwards-Anderson spin glasses
Creators: name: Franz, Silvio
name: Ricci-Tersenghi, Federico
Publisher: name: arXiv
Year: 1999
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We perform an accurate test of Ultrametricity in the aging dynamics of the three dimensional Edwards-Anderson spin glass. Our method consists in considering the evolution in parallel of two identical systems constrained to have fixed overlap. This turns out to be a particularly efficient way to study the geometrical relations between configurations at distant large times. Our findings strongly hint towards dynamical ultrametricity in spin glasses, while this is absent in simpler aging systems with domain growth dynamics. A recently developed theory of linear response in glassy systems allows to infer that dynamical ultrametricity implies the same property at the level of equilibrium states.
description: 4 pages, 5 figures
Anaxagorea phaeocarpa Mart.
Creators: name: Molino, Jean-François
name: Sabatier, Daniel
name: Grenand, Pierre
name: Engel, Julien
name: Frame, Dawn
name: Delprete, Piero G.
name: Fleury, Marie
name: Odonne, Guillaume
name: Davy, Damien
name: Lucas, Eve J.
name: Martin, Claire A.
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Magnoliales
Annonaceae
Anaxagorea
Anaxagorea phaeocarpa

description: [23] Anaxagorea phaeocarpa Mart.
 Fl. Bras. [Martius] 13 (1): 40 [1 Jan. 1841] (Martius 1841).
 Anaxagorea costaricensis R.E.Fr., Acta Horti Berg. 12 (1): 25 (Fries 1934).
VERNACULAR NAMES. — Pa: kigiksau, kiriksau • Wp: sa’i melu ka’a.
 HERBARIUM DATA (FG). — 5 collections at CAY. Sel. exs.: R.A.A. Oldeman 1897.
 SIZE. — Up to 15 cm dbh (Maas et al. 2007).
description: Published as part of Molino, Jean-François, Sabatier, Daniel, Grenand, Pierre, Engel, Julien, Frame, Dawn, Delprete, Piero G., Fleury, Marie, Odonne, Guillaume, Davy, Damien, Lucas, Eve J. & Martin, Claire A., 2022, An annotated checklist of the tree species of French Guiana, including vernacular nomenclature, pp. 345-903 in Adansonia (3) (3) 44 (26) on page 367, DOI: 10.5252/adansonia2022v44a26, http://zenodo.org/record/7458777
Search for an Near-IR Counterpart to the Cas A X-ray Point Source
Creators: name: Kaplan, D. L.
name: Kulkarni, S. R.
name: Murray, S. S.
Publisher: name: arXiv
Year: 2001
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report deep near-infrared and optical observations of the X-ray point source in the Cassiopeia A supernova remnant, CXO J232327.9+584842. We have identified a J=21.4 +/- 0.3 mag and Ks=20.5 +/- 0.3 mag source within the 1-sigma error circle, but we believe this source is a foreground Pop II star with Teff=2600-2800 K at a distance of ~2 kpc, which could not be the X-ray point source. We do not detect any sources in this direction at the distance of Cas A, and therefore place 3-sigma limits of R >~ 25 mag, F675W >~ 27.3 mag, J >~ 22.5 mag and Ks >~ 21.2 mag (and roughly H >~ 20 mag) on emission from the X-ray point source, corresponding to M_{R} >~ 8.2 mag, M_{F675W} >~ 10.7 mag, M_{J} >~ 8.5 mag, M_{H} >~ 6.5 mag, and M_{Ks} >~ 8.0 mag, assuming a distance of 3.4 kpc and an extinction A_{V}=5 mag.
description: 14 pages, 7 figures. Accepted by ApJ
Searches for Skyrmions in the Limit of Zero g-Factor
Creators: name: Leadley, D. R.
name: Nicholas, R. J.
name: Maude, D. K.
name: Utjuzh, A. N.
name: Portal, J. C.
name: Harris, J. J.
name: Foxon, C. T.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Energy gaps have been measured for the ferromagnetic quantum Hall effect states at v=1 and 3 in GaAs/GaAlAs heterojunctions as a function of Zeeman energy, which is reduced to zero by applying hydrostatic pressures of up to 20kbar. At large Zeeman energy the gaps are consistent with spin wave excitations. For a low density sample the gap at v=1 decreases with increasing pressure and reaches a minimum when the g-factor vanishes. At small Zeeman energy the excitation appears to consist of a large number of reversed spins and may be interpreted as a Skyrmion. The data also suggest Skyrmionic excitations take place at v=3. The width of the minimum at v=1 is found to decrease as the g-factor is reduced in a similar way for all samples.
description: 14 pages, 9 figures. To appear in Semiconductor Science and Technology
Optimization of On-condition Thresholds for a System of Degrading Components with Competing Dependent Failure Processes
Creators: name: Song, Sanling
name: Yousefi, Nooshin
name: Coit, David W.
name: Feng, Qianmei
Publisher: name: arXiv
Year: 2019
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: An optimization model has been formulated and solved to determine on-condition failure thresholds and inspection intervals for multi-component systems with each component experiencing multiple failure processes due to simultaneous exposure to degradation and shock loads. In this new model, we consider on-condition maintenance optimization for systems of degrading components, which offers cost benefits over time-based preventive maintenance or replace-on-failure policies. For systems of degrading components, this can be a particularly difficult problem because of the dependent degradation and dependent failure times. In previous research, preventive maintenance and periodic inspection models have been considered; however, for systems whose costs due to failure are high, it is prudent to avoid the event of failure, i.e., we should repair or replace the components or system before the failure happens. The determination of optimal on-condition thresholds for all components is effective to avoid failure and to minimize cost. Low on-condition thresholds can be inefficient because they waste components life, and high on-condition thresholds are risky because the components are prone to costly failure. In this paper, we formulated and solved a new optimization model to determine optimal on-condition thresholds and inspection intervals. In our model, when the system is inspected, all components are inspected at that time. An inspection interval may be optimal for one component, but might be undesirable for another component, so the optimization requires a compromise. The on-condition maintenance optimization model is demonstrated on several examples.
Experiment Design with Gaussian Process Regression with Applications to Chance-Constrained Control
Creators: name: Anderson, Sean
name: Byl, Katie
name: Hespanha, João P.
Publisher: name: arXiv
Year: 2025
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Learning for control in repeated tasks allows for well-designed experiments to gather the most useful data. We consider the setting in which we use a data-driven controller that does not have access to the true system dynamics. Rather, the controller uses inferred dynamics based on the available information. In order to acquire data that is beneficial for this controller, we present an experimental design approach that leverages the current data to improve expected control performance. We focus on the setting in which inference on the unknown dynamics is performed using Gaussian processes. Gaussian processes not only provide uncertainty quantification but also allow us to leverage structures inherent to Gaussian random variables. Through this structure, we design experiments via gradient descent on the expected control performance with respect to the experiment input. In particular, we focus on a chance-constrained minimum expected time control problem. Numerical demonstrations of our approach indicate our experimental design outperforms relevant benchmarks.
description: 8 pages
Neue Regeln zum Text- und Data-Mining - erweiterte Freiräume für automatisierte Datenanalyse
Creators: name: Brettschneider, Peter
Publisher: name: Zenodo
Year: 2021
Subjects: Text- und Data-Mining
Digital-Single-Market-Richtlinie
automatisierte Datenanalyse

description: Im Schatten der Diskussion um Uploadfilter und das Leistungsschutzrecht für Presseverleger sind die Regelungen zum Text- und Data-Mining in der Digital-Single-Market-Richtlinie der EU [Richtlinie (EU) 2019/790] weitgehend unbeachtet geblieben. Für den deutschen Gesetzgeber geht damit die Notwendigkeit einer grundlegenden Überarbeitung von § 60d UrhG einher. Zusätzlich gilt es, das neues Jedermann-Recht zum Text- und Data-Mining ins deutsche Urheberrecht aufzunehmen. Anlässlich ihres Inkrafttretens am 7.6.2021, stellt der Vortrag die neuen Regelungen vor und analysiert sowohl ihre Potentiale als auch Schwachstellen.
Classification of image distortions in terms of Petrov types
Creators: name: Chrobok, Thoralf
name: Perlick, Volker
Publisher: name: arXiv
Year: 2000
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: An observer surrounded by sufficiently small spherical light sources at a fixed distance will see a pattern of elliptical images distributed over the sky, owing to the distortion effect (shearing effect) of the spacetime geometry upon light bundles. In lowest non-trivial order with respect to the distance, this pattern is completely determined by the conformal curvature tensor (Weyl tensor) at the observation event. In this paper we derive formulas that allow to calculate these distortion patterns in terms of the Newman-Penrose formalism. Then we represent the distortion patterns graphically for all Petrov types, and we discuss their dependence on the velocity of the observer.
description: 22 pages, 8 eps-figures; revised version, parts of Introduction and Conclusions rewritten
Inovação na Editoração de Periódicos: Cited-by e Registro de Referências no Crossref
Creators: name: Rossoni, Luciano
Publisher: name: Zenodo
Year: 2019
Subjects: Impacto
Citações
Crossref
Cited-by
Journals

description: Apresentação realizada no Painel EnANPAD 2019 EPQ 4 - Inovação na Editoração de Periódicos
Teaching and Learning resource for trainee teachers: data collection spreadsheet for mock Weisberg experiment
Creators: name: McMahon, Kendra
name: Etchells, Peter
Publisher: name: BathSPAdata
Year: 2019
Subjects: subject: 130313 Teacher Education and Professional Development of Educators
subject: FOS: Educational sciences
subject: Education

description: This is a teaching resource provided to download and use as part of the workshop Critical Consumers of Neuroscience for trainee teachers.
This resource is an outcome of a wider project: Enhancing the Learning Sciences in Initial Teacher Education.
The academic paper describing the original research on which the workshop activity is based is: Weisberg, D. S., Keil, F. C., Goodstein, J., Rawson, E., & Gray, J. (2008). The Seductive Allure of Neuroscience Explanations. Journal of Cognitive Neuroscience, 20(3), 470-477.
Annona ambotay Aubl.
Creators: name: Molino, Jean-François
name: Sabatier, Daniel
name: Grenand, Pierre
name: Engel, Julien
name: Frame, Dawn
name: Delprete, Piero G.
name: Fleury, Marie
name: Odonne, Guillaume
name: Davy, Damien
name: Lucas, Eve J.
name: Martin, Claire A.
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Magnoliales
Annonaceae
Annona
Annona ambotay

description: [24] Annona ambotay Aubl.
 Hist. Pl. Guiane 1: 616 [Jun.-Dec. 1775] (Aublet 1775).
 VERNACULAR NAMES. — Ka: ambotay (fide Aublet 1775) • Te: dzalatay • Wp: ɨwi tay, ɨwi tay sili • Nt: busi atuku • Cr: viratay • Br: araticú, envira-caju, envira-jodó, envira-taia.
 HERBARIUM DATA (FG). — 28 collections at CAY. Sel. exs.: J.B. Aublet s.n. (original material LINN [LINN-HS 983.5]).
INVENTORY DATA (FG). — 28 trees in 26 plots; Fmax <1 %; dbhinv = 18.9 cm.
description: Published as part of Molino, Jean-François, Sabatier, Daniel, Grenand, Pierre, Engel, Julien, Frame, Dawn, Delprete, Piero G., Fleury, Marie, Odonne, Guillaume, Davy, Damien, Lucas, Eve J. & Martin, Claire A., 2022, An annotated checklist of the tree species of French Guiana, including vernacular nomenclature, pp. 345-903 in Adansonia (3) (3) 44 (26) on page 367, DOI: 10.5252/adansonia2022v44a26, http://zenodo.org/record/7458777
Flux Lattice Melting and Lowest Landau Level Fluctuations
Creators: name: Pierson, Stephen W.
name: Valls, Oriol T.
Publisher: name: arXiv
Year: 1997
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We discuss the influence of lowest Landau level (LLL) fluctuations near H_{c2}(T) on flux lattice melting in YBa$_2$Cu$_3$O$_{7-δ}$ (YBCO). We show that the specific heat step of the flux lattice melting transition in YBCO single crystals can be attributed largely to the degrees of freedom associated with LLL fluctuations. These degrees of freedom have already been shown to account for most of the latent heat. We also show that these results are a consequence of the correspondence between flux lattice melting and the onset of LLL fluctuations.
description: 4 pages, 2 embedded figures
Knowing the past improves cooperation in the future
Creators: name: Danku, Zsuzsa
name: Perc, Matjaz
name: Szolnoki, Attila
Publisher: name: arXiv
Year: 2019
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Computer Science and Game Theory (cs.GT)
subject: Populations and Evolution (q-bio.PE)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: FOS: Biological sciences

description: Cooperation is the cornerstone of human evolutionary success. Like no other species, we champion the sacrifice of personal benefits for the common good, and we work together to achieve what we are unable to achieve alone. Knowledge and information from past generations is thereby often instrumental in ensuring we keep cooperating rather than deteriorating to less productive ways of coexistence. Here we present a mathematical model based on evolutionary game theory that shows how using the past as the benchmark for evolutionary success, rather than just current performance, significantly improves cooperation in the future. Interestingly, the details of just how the past is taken into account play only second-order importance, whether it be a weighted average of past payoffs or just a single payoff value from the past. Cooperation is promoted because information from the past disables fast invasions of defectors, thus enhancing the long-term benefits of cooperative behavior.
description: preprint form 15 pages, 6 figures; accepted for publication in Scientific Reports
Comment on "Macrospopic Equation for the Roughness of Growing Interfaces in Quenched Disorder"
Creators: name: Lopez, Juan M.
name: Ramasco, Jose J.
name: Rodriguez, Miguel A.
Publisher: name: arXiv
Year: 1999
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We comment on a recent Letter by Braunstein and Buceta [PRL vol.81, 630 (1998)], in which a novel equation has been proposed to describe the dynamics of interfaces in the presence of quenched disorder. We argue that the ansatz Braunstein and Buceta presented is just an effective description of the very short times regime and has no significance for the macroscopic (large scale) behaviour of the interface. We calculate an expression for the short time behaviour of the interface that is valid for any q (and not only at q_c).
description: 1 page, 1 figure, uses epsf
Accurate first-principle equation of state for the One-Component Plasma
Creators: name: Brilliantov, N. V.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Accurate "first-principle" expressions for the excess free energy $F_{ex}$ and internal energy $U_{ex}$ of the classical one-component plasma (OCP) are obtained. We use the Hubbard-Schofield transformation that maps the OCP Hamiltonian onto the Ising-like Hamiltonian, with coefficients expressed in terms of equilibrium correlation functions of a reference system. We use the ideal gas as a reference system for which all the correlation functions are known. Explicit calculations are performed with the high-order terms in the Ising-like Hamiltonian omitted. For small values of the plasma parameter $Γ$ the Debye-Huckel result for $F_{ex}$ and $U_{ex}$ is recovered. For large $Γ$ these depend linearly on $Γ$ in accordance with the Monte Carlo findings for the OCP. The MC data for the internal energy are reproduced fairly well by the obtained analytical expression.
description: 15 pages, 2 figures, to appear in Contrib. Plasma Phys., v.38 N4, (1998)
Dynamic thermoviscoelastic thermistor problem with contact and nonmonotone friction
Creators: name: Bartosz, Krzysztof
name: Janiczko, Tomasz
name: Szafraniec, Paweł
name: Shillor, Meir
Publisher: name: arXiv
Year: 2019
Subjects: subject: Mathematical Physics (math-ph)
subject: Analysis of PDEs (math.AP)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: The paper studies the evolution of the thermomechanical and electric state of a thermoviscoelastic thermistor that is in frictional contact with a reactive foundation. The mechanical process is dynamic, while the electric process is quasistatic. Friction is modeled with a nonmonotone relation between the tangential traction and tangential velocity. Frictional heat generation is taken into account and so is the strong dependence of the electric conductivity on the temperature. The mathematical model for the process is in the form of a system that consists of dynamic hyperbolic subdifferential inclusion for the mechanical state coupled with a nonlinear parabolic equation for the temperature and an elliptic equation for the electric potential. The paper establishes the existence of a weak solution to the problem by using time delays, a priori estimates and a convergence method.
description: 25 pages
Annona cuspidata H. Rainer
Creators: name: Molino, Jean-François
name: Sabatier, Daniel
name: Grenand, Pierre
name: Engel, Julien
name: Frame, Dawn
name: Delprete, Piero G.
name: Fleury, Marie
name: Odonne, Guillaume
name: Davy, Damien
name: Lucas, Eve J.
name: Martin, Claire A.
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Magnoliales
Annonaceae
Annona
Annona cuspidata

description: [25] Annona cuspidata (Mart.) H.Rainer
 Ann. Naturhist. Mus. Wien 108 B: 193 (Rainer 2007). — Rollinia cuspidata Mart., Fl. Bras. [Martius] 13 (1): 20 [1 Jan. 1841] (Martius 1841).
 Rollinia cardiantha Diels, Verh. Bot. Vereins Prov. Brandenburg 47: 134 [1 Oct. 1905] (Diels 1905).
 Rollinia pachyptera Diels, Notizbl. Bot. Gart. Berlin-Dahlem 10: 176 [20 Dec. 1927] (Diels 1927).
 Rollinia sphaerantha R.E.Fr., Acta Horti Berg. 12 (1): 184 (Fries 1934).
 Rollinia uniflora R.E.Fr., Acta Horti Berg. 12 (1): 182 (Fries 1934).
 HERBARIUM DATA (FG). — 10 collections at CAY. Sel. exs.: P. Chareyre 30D.
 SIZE. — Up to 20 cm dbh (Maas et al. 1992).
description: Published as part of Molino, Jean-François, Sabatier, Daniel, Grenand, Pierre, Engel, Julien, Frame, Dawn, Delprete, Piero G., Fleury, Marie, Odonne, Guillaume, Davy, Damien, Lucas, Eve J. & Martin, Claire A., 2022, An annotated checklist of the tree species of French Guiana, including vernacular nomenclature, pp. 345-903 in Adansonia (3) (3) 44 (26) on page 367, DOI: 10.5252/adansonia2022v44a26, http://zenodo.org/record/7458777
Future ground arrays for ultrahigh-energy cosmic rays: recent updates and perspectives
Creators: name: Fujii, Toshihiro
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The origin and nature of ultrahigh-energy cosmic rays (UHECRs) are one of the most intriguing mysteries in particle astrophysics and astronomy. The two largest observatories, the Pierre Auger Observatory and the Telescope Array Experiment, are steadily observing UHECRs in both hemispheres in order to better understand their origin and associated acceleration mechanisms at the highest energies. We highlight their latest results including on-going upgrades, AugerPrime and TAx4, and then address the requirements for a next-generation observatory. We share recent updates and perspectives for a future ground array of fluorescence detectors, addressing the requirements for a large-area, low-cost detector suitable for measuring the properties of the highest energy cosmic rays with an unprecedented aperture.
description: Invited talk in ISVHECRI 2018, Nagoya, Japan
Annona exsucca DC.
Creators: name: Molino, Jean-François
name: Sabatier, Daniel
name: Grenand, Pierre
name: Engel, Julien
name: Frame, Dawn
name: Delprete, Piero G.
name: Fleury, Marie
name: Odonne, Guillaume
name: Davy, Damien
name: Lucas, Eve J.
name: Martin, Claire A.
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Magnoliales
Annonaceae
Annona
Annona exsucca

description: [26] Annona exsucca DC.
 in Dunal, Monogr. Anonac.: 77 [Aug.-Nov. 1817] (Candolle 1817). — Rollinia exsucca (DC.) A.DC., Mém. Soc. Phys. Genève 5: 199 (Candolle 1832).
 Rollinia puberula A.DC., Mém. Soc. Phys. Genève 5: 200 (Candolle 1832).
 Rollinia multiflora Splitg., Tijdschr. Nat. Geschied. Physiol. 9: 97 [Aug.-Sep. 1842] (Splitgerber 1842).
 Rollinia tinifolia Klotzsch ex M.R.Schomb., Reis. Br. - Guiana [Ri. Schomburgk] 3: 1163 [“1848” publ. 7-10 Mar. 1849] (Schomburgk 1849), nom. subnud.
 Rollinia glaucescens Miq., Stirp. Surinam. Select.: 108 [“1850” publ. Mar. 1851] (Miquel 1851).
 Rollinia resinosa Spruce ex Benth., Hooker’s J. Bot. Kew Gard. Misc. 5: 9 (Bentham 1853). — Rollinia exsucca subsp. resinosa (Spruce ex Benth.) R.E.Fr., Acta Horti Berg. 12 (1): 144 (Fries 1934).
 Rollinia incurva S.Moore, Trans. Linn. Soc. London, Bot. 4 (3): 303 [“1894-96” publ. Dec. 1895] (Moore 1895).
 Rollinia brevipes R.E.Fr., Acta Horti Berg. 12 (1): 147 (Fries 1934).
 Rollinia broadwayi R.E.Fr., Acta Horti Berg. 12 (1): 145 (Fries 1934).
 Rollinia broadwayi var. cuneata R.E.Fr., Acta Horti Berg. 12 (1): 145 (Fries 1934).
 Rollinia exsucca subsp. elongata R.E.Fr., Acta Horti Berg. 12 (1): 145 (Fries 1934).
 Rollinia gardneri R.E.Fr., Acta Horti Berg. 12 (1): 157 (Fries 1934).
 Rollinia surinamensis R.E.Fr., Acta Horti Berg. 12 (1): 147 (Fries 1934).
 Rollinia procera R.E.Fr., Acta Horti Berg. 12 (3): 565 (Fries 1939).
 NOTE. — Dunal (1817: 77) explicitly ascribed the name and description of Annona exsucca to “DC. Syst. univ. ined.” See above note for Annona exsucca.
VERNACULAR NAMES. — Pa: manig-retni • Ka: kasimyalan, tagulewe, takulewe • Wp: ɨwi lũ• Nt: busi atuku • Cr: abriba-sovaj • Fr: corossol sauvage • Br: araticú-do-mato, araticú-macho, biribá-brava.
 HERBARIUM DATA (FG). — 130 collections at CAY.Sel.exs.: Unknown coll. s.n. (holotype of Rollinia puberula: G [G00226077]; iso-, B [B 10 0243129], F [V0047921F], S [fragm. S-R-6899]).
INVENTORY DATA (FG). — 33 trees in 27 plots; Fmax <1 %; dbhinv = 38 cm.
description: Published as part of Molino, Jean-François, Sabatier, Daniel, Grenand, Pierre, Engel, Julien, Frame, Dawn, Delprete, Piero G., Fleury, Marie, Odonne, Guillaume, Davy, Damien, Lucas, Eve J. & Martin, Claire A., 2022, An annotated checklist of the tree species of French Guiana, including vernacular nomenclature, pp. 345-903 in Adansonia (3) (3) 44 (26) on page 367, DOI: 10.5252/adansonia2022v44a26, http://zenodo.org/record/7458777
Pinpointing the massive black hole in the Galactic Center with gravitationally lensed stars
Creators: name: Alexander, Tal
Publisher: name: arXiv
Year: 2001
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: A new statistical method for pinpointing the massive black hole (BH) in the Galactic Center on the IR grid is presented and applied to astrometric IR observations of stars close to the BH. This is of interest for measuring the IR emission from the BH, in order to constrain accretion models; for solving the orbits of stars near the BH, in order to measure the BH mass and to search for general relativistic effects; and for detecting the fluctuations of the BH away from the dynamical center of the stellar cluster, in order to study the stellar potential. The BH lies on the line connecting the two images of any background source it gravitationally lenses, and so the intersection of these lines fixes its position. A combined search for a lensing signal and for the BH shows that the most likely point of intersection coincides with the center of acceleration of stars orbiting the BH. This statistical detection of lensing by the BH has a random probability of ~0.01. It can be verified by deep IR stellar spectroscopy, which will determine whether the most likely lensed image pair candidates (listed here) have identical spectra.
description: 4 pages, 2 figures, submitted to ApJL