Статья

The GALAH+ survey: Third data release

Sven BuderCenter of Excellence for Astrophysics in Three Dimensions (ASTRO-3D), AustraliaSanjib SharmaCenter of Excellence for Astrophysics in Three Dimensions (ASTRO-3D), AustraliaJanez KosFaculty of Mathematics and Physics, University of Ljubljana, Jadranska 19, 1000 Ljubljana, SloveniaA. M. AmarsiTheoretical Astrophysics, Department of Physics and Astronomy, Uppsala University, Box 516, SE-751 20 Uppsala, SwedenThomas NordlanderCenter of Excellence for Astrophysics in Three Dimensions (ASTRO-3D), AustraliaK. LindDepartment of Astronomy, Stockholm University, AlbaNova, Roslagstullbacken 21, SE-10691 Stockholm, SwedenSarah L. MartellCenter of Excellence for Astrophysics in Three Dimensions (ASTRO-3D), AustraliaM. AsplundMax Planck Institute for Astrophysics, Karl-Schwarzschild-Str. 1, D-85741 Garching, GermanyJoss Bland‐HawthornCenter of Excellence for Astrophysics in Three Dimensions (ASTRO-3D), AustraliaAndrew R. CaseyMonash Centre for Astrophysics, Monash University, Wellington Rd, Clayton, VIC 3800, AustraliaGayandhi M De SilvaAustralian Astronomical Optics, Faculty of Science and Engineering, Macquarie University, Macquarie Park, NSW 2113, AustraliaV. D’OraziIstituto Nazionale di Astrofisica, Osservatorio Astronomico di Padova, vicolo dell’Osservatorio 5, I-35122 Padova, ItalyK. C. FreemanCenter of Excellence for Astrophysics in Three Dimensions (ASTRO-3D), AustraliaMichael HaydenCenter of Excellence for Astrophysics in Three Dimensions (ASTRO-3D), AustraliaGeraint F. LewisSydney Institute for Astronomy, School of Physics, A28, The University of Sydney, NSW 2006, AustraliaJane LinCenter of Excellence for Astrophysics in Three Dimensions (ASTRO-3D), AustraliaKatharine J. SchlesingerResearch School of Astronomy and Astrophysics, Australian National University, ACT 2611, AustraliaJeffrey D. SimpsonCenter of Excellence for Astrophysics in Three Dimensions (ASTRO-3D), AustraliaDennis StelloSchool of Physics, UNSW, Sydney, NSW 2052, AustraliaD. B. ZuckerDepartment of Physics and Astronomy, Macquarie University, Sydney, NSW 2109, AustraliaT. ZwitterFaculty of Mathematics and Physics, University of Ljubljana, Jadranska 19, 1000 Ljubljana, SloveniaKevin L BeesonFaculty of Mathematics and Physics, University of Ljubljana, Jadranska 19, 1000 Ljubljana, SloveniaTobias BuckLeibniz-Institut für Astrophysik Potsdam (AIP), An der Sternwarte 16, D-14482 Potsdam, GermanyL. CasagrandeCenter of Excellence for Astrophysics in Three Dimensions (ASTRO-3D), AustraliaJake ClarkCentre for Astrophysics, University of Southern Queensland, West Street, Toowoomba, QLD 4350, AustraliaKlemen ČotarFaculty of Mathematics and Physics, University of Ljubljana, Jadranska 19, 1000 Ljubljana, SloveniaG. S. Da CostaCenter of Excellence for Astrophysics in Three Dimensions (ASTRO-3D), AustraliaRichard de GrijsDepartment of Physics and Astronomy, Macquarie University, Sydney, NSW 2109, AustraliaDiane FeuilletLund Observatory, Department of Astronomy and Theoretical Physics, Box 43, SE-221 00 Lund, SwedenJonathan HornerCentre for Astrophysics, University of Southern Queensland, West Street, Toowoomba, QLD 4350, AustraliaPrajwal R. KafleICRAR, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, AustraliaS. KhannaKapteyn Astronomical Institute, University of Groningen, Landleven 12, NL-9747 AD Groningen, the NetherlandsChiaki KobayashiCenter of Excellence for Astrophysics in Three Dimensions (ASTRO-3D), AustraliaFan LiuCentre for Astrophysics and Supercomputing, Swinburne University of Technology, Hawthorn, Victoria 3122, AustraliaBenjamin T. MontetSchool of Physics, UNSW, Sydney, NSW 2052, AustraliaGovind NandakumarCenter of Excellence for Astrophysics in Three Dimensions (ASTRO-3D), AustraliaDavid M. NatafCenter for Astrophysical Sciences and Department of Physics and Astronomy, The Johns Hopkins University, Baltimore, MD 21218, USAMelissa NessCenter for Computational Astrophysics, Flatiron Institute, 162 Fifth Avenue, New York, NY 10010, USAL. SpinaCenter of Excellence for Astrophysics in Three Dimensions (ASTRO-3D), AustraliaThor Tepper-GarcíaCenter of Excellence for Astrophysics in Three Dimensions (ASTRO-3D), AustraliaYuan-Sen TingDepartment of Astrophysical Sciences, Princeton University, Princeton, NJ 08544, USAG. TravenLund Observatory, Department of Astronomy and Theoretical Physics, Box 43, SE-221 00 Lund, SwedenRok VogrinčičFaculty of Mathematics and Physics, University of Ljubljana, Jadranska 19, 1000 Ljubljana, SloveniaRobert A. WittenmyerCentre for Astrophysics, University of Southern Queensland, West Street, Toowoomba, QLD 4350, AustraliaRosemary F. Ġ. WyseCenter for Astrophysical Sciences and Department of Physics and Astronomy, The Johns Hopkins University, Baltimore, MD 21218, USAM. ŽerjalResearch School of Astronomy and Astrophysics, Australian National University, ACT 2611, Australia

2021en

ABI

Аннотация

ABSTRACT The ensemble of chemical element abundance measurements for stars, along with precision distances and orbit properties, provides high-dimensional data to study the evolution of the Milky Way. With this third data release of the Galactic Archaeology with HERMES (GALAH) survey, we publish 678 423 spectra for 588 571 mostly nearby stars (81.2 per cent of stars are within &lt;2 kpc), observed with the HERMES spectrograph at the Anglo-Australian Telescope. This release (hereafter GALAH+ DR3) includes all observations from GALAH Phase 1 (bright, main, and faint survey, 70 per cent), K2-HERMES (17 per cent), TESS-HERMES (5 per cent), and a subset of ancillary observations (8 per cent) including the bulge and &gt;75 stellar clusters. We derive stellar parameters Teff, log g, [Fe/H], vmic, vbroad, and vrad using our modified version of the spectrum synthesis code Spectroscopy Made Easy (sme) and 1D marcs model atmospheres. We break spectroscopic degeneracies in our spectrum analysis with astrometry from Gaia DR2 and photometry from 2MASS. We report abundance ratios [X/Fe] for 30 different elements (11 of which are based on non-LTE computations) covering five nucleosynthetic pathways. We describe validations for accuracy and precision, flagging of peculiar stars/measurements and recommendations for using our results. Our catalogue comprises 65 per cent dwarfs, 34 per cent giants, and 1 per cent other/unclassified stars. Based on unflagged chemical composition and age, we find 62 per cent young low-$\alpha$, 9 per cent young high-$\alpha$, 27 per cent old high-$\alpha$, and 2 per cent stars with [Fe/H] ≤ −1. Based on kinematics, 4 per cent are halo stars. Several Value-Added-Catalogues, including stellar ages and dynamics, updated after Gaia eDR3, accompany this release and allow chrono-chemodynamic analyses, as we showcase.

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Идентификаторы

DOI: 10.1093/mnras/stab1242

Цитирования и источники

Цитирований: 2Использованных источников: 0

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