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The GALAH+ survey :
The GALAH+ survey : Third data release
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- Buder, Sven (author)
- Max Planck Institute for Astronomy,Australian National University
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Sharma, Sanjib (author)
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Kos, Janez (author)
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Amarsi, Anish M. (author)
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Nordlander, Thomas (author)
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- Lind, Karin (author)
- Stockholms universitet,Institutionen för astronomi,Max Planck Institute for Astronomy (MPIA), Germany
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Martell, Sarah L. (author)
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Asplund, Martin (author)
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Bland-Hawthorn, Joss (author)
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Casey, Andrew R. (author)
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De Silva, Gayandhi M. (author)
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D'Orazi, Valentina (author)
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Freeman, Ken C. (author)
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Hayden, Michael R. (author)
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Lewis, Geraint F. (author)
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Lin, Jane (author)
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Schlesinger, Katharine J. (author)
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Simpson, Jeffrey D. (author)
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Stello, Dennis (author)
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Zucker, Daniel B. (author)
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Zwitter, Tomaž (author)
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Beeson, Kevin L. (author)
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Buck, Tobias (author)
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Casagrande, Luca (author)
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Clark, Jake T. (author)
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Čotar, Klemen (author)
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Da Costa, Gary S. (author)
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de Grijs, Richard (author)
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- Feuillet, Diane (author)
- Lund University,Lunds universitet,Astronomi - Genomgår omorganisation,Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation,Naturvetenskapliga fakulteten,Lund Observatory - Undergoing reorganization,Department of Astronomy and Theoretical Physics - Undergoing reorganization,Faculty of Science,Max Planck Institute for Astronomy
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Horner, Jonathan (author)
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Kafle, Prajwal R. (author)
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Khanna, Shourya (author)
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Kobayashi, Chiaki (author)
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Liu, Fan (author)
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Montet, Benjamin T. (author)
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Nandakumar, Govind (author)
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Nataf, David M. (author)
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Ness, Melissa K. (author)
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Spina, Lorenzo (author)
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Tepper-Garcia, Thor (author)
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Ting, Yuan-Sen (author)
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Traven, Gregor (author)
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Vogrinčič, Rok (author)
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Wittenmyer, Robert A. (author)
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Wyse, Rosemary F. G. (author)
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- Žerjal, Maruša (author)
- University of Ljubljana
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(creator_code:org_t)
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- 2021-05-06
- 2021
- English.
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In: Monthly notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 506:1, s. 150-201
- Related links:
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http://eprints.usq.e...
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http://dx.doi.org/10...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://lup.lub.lu.s...
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Abstract
Subject headings
Close
- 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 <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 >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-α, 9 per cent young high-α, 27 per cent old high-α, 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.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- methods: data analysis
- methods: observational
- surveys
- stars: abundances
- stars: fundamental parameters
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
To the university's database
- By the author/editor
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Buder, Sven
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Sharma, Sanjib
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Kos, Janez
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Amarsi, Anish M.
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Nordlander, Thom ...
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Lind, Karin
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show more...
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Martell, Sarah L ...
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Asplund, Martin
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Bland-Hawthorn, ...
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Casey, Andrew R.
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De Silva, Gayand ...
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D'Orazi, Valenti ...
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Freeman, Ken C.
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Hayden, Michael ...
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Lewis, Geraint F ...
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Lin, Jane
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Schlesinger, Kat ...
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Simpson, Jeffrey ...
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Stello, Dennis
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Zucker, Daniel B ...
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Zwitter, Tomaž
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Beeson, Kevin L.
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Buck, Tobias
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Casagrande, Luca
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Clark, Jake T.
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Čotar, Klemen
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Da Costa, Gary S ...
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de Grijs, Richar ...
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Feuillet, Diane
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Horner, Jonathan
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Kafle, Prajwal R ...
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Khanna, Shourya
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Kobayashi, Chiak ...
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Liu, Fan
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Montet, Benjamin ...
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Nandakumar, Govi ...
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Nataf, David M.
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Ness, Melissa K.
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Spina, Lorenzo
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Tepper-Garcia, T ...
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Ting, Yuan-Sen
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Traven, Gregor
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Vogrinčič, Rok
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Wittenmyer, Robe ...
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Wyse, Rosemary F ...
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Žerjal, Maruša
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Astronomy Astrop ...
- Articles in the publication
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Monthly notices ...
- By the university
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Stockholm University
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Lund University