The GALAH plus survey: Third data release

GALAH collaboration; Sven Buder; Sanjib Sharma; Janez Kos; Anish M. Amarsi; Thomas Nordlander; Karin Lind; Sarah L. Martell; Martin Asplund; Joss Bland-Hawthorn; Andrew R. Casey; Gayandhi M. De Silva; Valentina D'Orazi; Ken C. Freeman; Michael R. Hayden; Geraint F. Lewis; Jane Lin; Katharine J. Schlesinger; Jeffrey D. Simpson; Dennis Stello; Daniel B. Zucker; Tomaž Zwitter; Kevin L. Beeson; Tobias Buck; Luca Casagrande; Jake T. Clark; Klemen Čotar; Gary S. Da Costa; Richard de Grijs; Diane Feuillet; Jonathan Horner; Prajwal R. Kafle; Shourya Khanna; Chiaki Kobayashi; Fan Liu; Benjamin T. Montet; Govind Nandakumar; David M. Nataf; Melissa K. Ness; Lorenzo Spina; Thor Tepper-García; Yuan-Sen Ting; Gregor Traven; Rok Vogrinčič; Robert A. Wittenmyer; Rosemary F. G. Wyse; Maruša Žerjal

doi:10.1093/mnras/stab1242

The GALAH plus survey: Third data release

GALAH collaboration, Sven Buder^*, Sanjib Sharma, Janez Kos, Anish M. Amarsi, Thomas Nordlander, Karin Lind, Sarah L. Martell, Martin Asplund, Joss Bland-Hawthorn, Andrew R. Casey, Gayandhi M. De Silva, Valentina D'Orazi, Ken C. Freeman, Michael R. Hayden, Geraint F. Lewis, Jane Lin, Katharine J. Schlesinger, Jeffrey D. Simpson, Dennis StelloDaniel B. Zucker, Tomaž Zwitter, Kevin L. Beeson, Tobias Buck, Luca Casagrande, Jake T. Clark, Klemen Čotar, Gary S. Da Costa, Richard de Grijs, Diane Feuillet, Jonathan Horner, Prajwal R. Kafle, Shourya Khanna, Chiaki Kobayashi, Fan Liu, Benjamin T. Montet, Govind Nandakumar, David M. Nataf, Melissa K. Ness, Lorenzo Spina, Thor Tepper-García, Yuan-Sen Ting, Gregor Traven, Rok Vogrinčič, Robert A. Wittenmyer, Rosemary F. G. Wyse, Maruša Žerjal

^*Corresponding author for this work

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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 <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 T_eff, log g, [Fe/H], v_mic, v_broad, and v_rad 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.

Original language	English
Pages (from-to)	150-201
Number of pages	52
Journal	Monthly Notices of the Royal Astronomical Society
Volume	506
Issue number	1
DOIs	https://doi.org/10.1093/mnras/stab1242
Publication status	Published - Sep 2021

Bibliographical note

This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society, Volume 506, Issue 1, September 2021, Pages 150–201, https://doi.org/10.1093/mnras/stab1242. Copyright 2021 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

Keywords

methods: data analysis
methods: observational
surveys
stars: abundances
stars: fundamental parameters

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10.1093/mnras/stab1242

Publisher version (open access)Final published version, 20.4 MBLicence: Other

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GALAH collaboration, Buder, S., Sharma, S., Kos, J., Amarsi, A. M., Nordlander, T., Lind, K., Martell, S. L., Asplund, M., Bland-Hawthorn, J., Casey, A. R., De Silva, G. M., D'Orazi, V., Freeman, K. C., Hayden, M. R., Lewis, G. F., Lin, J., Schlesinger, K. J., Simpson, J. D., ... Žerjal, M. (2021). The GALAH plus survey: Third data release. Monthly Notices of the Royal Astronomical Society, 506(1), 150-201. https://doi.org/10.1093/mnras/stab1242

GALAH collaboration ; Buder, Sven ; Sharma, Sanjib ; Kos, Janez ; Amarsi, Anish M. ; Nordlander, Thomas ; Lind, Karin ; Martell, Sarah L. ; Asplund, Martin ; Bland-Hawthorn, Joss ; Casey, Andrew R. ; De Silva, Gayandhi M. ; D'Orazi, Valentina ; Freeman, Ken C. ; Hayden, Michael R. ; Lewis, Geraint F. ; Lin, Jane ; Schlesinger, Katharine J. ; Simpson, Jeffrey D. ; Stello, Dennis ; Zucker, Daniel B. ; Zwitter, Tomaž ; Beeson, Kevin L. ; Buck, Tobias ; Casagrande, Luca ; Clark, Jake T. ; Čotar, Klemen ; Da Costa, Gary S. ; de Grijs, Richard ; Feuillet, Diane ; Horner, Jonathan ; Kafle, Prajwal R. ; Khanna, Shourya ; Kobayashi, Chiaki ; Liu, Fan ; Montet, Benjamin T. ; Nandakumar, Govind ; Nataf, David M. ; Ness, Melissa K. ; Spina, Lorenzo ; Tepper-García, Thor ; Ting, Yuan-Sen ; Traven, Gregor ; Vogrinčič, Rok ; Wittenmyer, Robert A. ; Wyse, Rosemary F. G. ; Žerjal, Maruša. / The GALAH plus survey : Third data release. In: Monthly Notices of the Royal Astronomical Society. 2021 ; Vol. 506, No. 1. pp. 150-201.

@article{5c4ff3c01de742f098524c9ea17b8ab4,

title = "The GALAH plus survey: Third data release",

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 <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.",

keywords = "methods: data analysis, methods: observational, surveys, stars: abundances, stars: fundamental parameters",

author = "{GALAH collaboration} and Sven Buder and Sanjib Sharma and Janez Kos and Amarsi, {Anish M.} and Thomas Nordlander and Karin Lind and Martell, {Sarah L.} and Martin Asplund and Joss Bland-Hawthorn and Casey, {Andrew R.} and {De Silva}, {Gayandhi M.} and Valentina D'Orazi and Freeman, {Ken C.} and Hayden, {Michael R.} and Lewis, {Geraint F.} and Jane Lin and Schlesinger, {Katharine J.} and Simpson, {Jeffrey D.} and Dennis Stello and Zucker, {Daniel B.} and Toma{\v z} Zwitter and Beeson, {Kevin L.} and Tobias Buck and Luca Casagrande and Clark, {Jake T.} and Klemen {\v C}otar and {Da Costa}, {Gary S.} and {de Grijs}, Richard and Diane Feuillet and Jonathan Horner and Kafle, {Prajwal R.} and Shourya Khanna and Chiaki Kobayashi and Fan Liu and Montet, {Benjamin T.} and Govind Nandakumar and Nataf, {David M.} and Ness, {Melissa K.} and Lorenzo Spina and Thor Tepper-Garc{\'i}a and Yuan-Sen Ting and Gregor Traven and Rok Vogrin{\v c}i{\v c} and Wittenmyer, {Robert A.} and Wyse, {Rosemary F. G.} and Maru{\v s}a {\v Z}erjal",

note = "This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society, Volume 506, Issue 1, September 2021, Pages 150–201, https://doi.org/10.1093/mnras/stab1242. Copyright 2021 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.",

year = "2021",

month = sep,

doi = "10.1093/mnras/stab1242",

language = "English",

volume = "506",

pages = "150--201",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "1365-2966",

publisher = "Oxford University Press",

number = "1",

}

GALAH collaboration, Buder, S, Sharma, S, Kos, J, Amarsi, AM, Nordlander, T, Lind, K, Martell, SL, Asplund, M, Bland-Hawthorn, J, Casey, AR, De Silva, GM, D'Orazi, V, Freeman, KC, Hayden, MR, Lewis, GF, Lin, J, Schlesinger, KJ, Simpson, JD, Stello, D, Zucker, DB, Zwitter, T, Beeson, KL, Buck, T, Casagrande, L, Clark, JT, Čotar, K, Da Costa, GS, de Grijs, R, Feuillet, D, Horner, J, Kafle, PR, Khanna, S, Kobayashi, C, Liu, F, Montet, BT, Nandakumar, G, Nataf, DM, Ness, MK, Spina, L, Tepper-García, T, Ting, Y-S, Traven, G, Vogrinčič, R, Wittenmyer, RA, Wyse, RFG & Žerjal, M 2021, 'The GALAH plus survey: Third data release', Monthly Notices of the Royal Astronomical Society, vol. 506, no. 1, pp. 150-201. https://doi.org/10.1093/mnras/stab1242

The GALAH plus survey : Third data release. / GALAH collaboration; Buder, Sven; Sharma, Sanjib; Kos, Janez; Amarsi, Anish M.; Nordlander, Thomas; Lind, Karin; Martell, Sarah L.; Asplund, Martin; Bland-Hawthorn, Joss; Casey, Andrew R.; De Silva, Gayandhi M.; D'Orazi, Valentina; Freeman, Ken C.; Hayden, Michael R.; Lewis, Geraint F.; Lin, Jane; Schlesinger, Katharine J.; Simpson, Jeffrey D.; Stello, Dennis; Zucker, Daniel B.; Zwitter, Tomaž; Beeson, Kevin L.; Buck, Tobias; Casagrande, Luca; Clark, Jake T.; Čotar, Klemen; Da Costa, Gary S.; de Grijs, Richard; Feuillet, Diane; Horner, Jonathan; Kafle, Prajwal R.; Khanna, Shourya; Kobayashi, Chiaki; Liu, Fan; Montet, Benjamin T.; Nandakumar, Govind; Nataf, David M.; Ness, Melissa K.; Spina, Lorenzo; Tepper-García, Thor; Ting, Yuan-Sen; Traven, Gregor; Vogrinčič, Rok; Wittenmyer, Robert A.; Wyse, Rosemary F. G.; Žerjal, Maruša.

In: Monthly Notices of the Royal Astronomical Society, Vol. 506, No. 1, 09.2021, p. 150-201.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - The GALAH plus survey

T2 - Third data release

AU - GALAH collaboration

AU - Buder, Sven

AU - Sharma, Sanjib

AU - Kos, Janez

AU - Amarsi, Anish M.

AU - Nordlander, Thomas

AU - Lind, Karin

AU - Martell, Sarah L.

AU - Asplund, Martin

AU - Bland-Hawthorn, Joss

AU - Casey, Andrew R.

AU - De Silva, Gayandhi M.

AU - D'Orazi, Valentina

AU - Freeman, Ken C.

AU - Hayden, Michael R.

AU - Lewis, Geraint F.

AU - Lin, Jane

AU - Schlesinger, Katharine J.

AU - Simpson, Jeffrey D.

AU - Stello, Dennis

AU - Zucker, Daniel B.

AU - Zwitter, Tomaž

AU - Beeson, Kevin L.

AU - Buck, Tobias

AU - Casagrande, Luca

AU - Clark, Jake T.

AU - Čotar, Klemen

AU - Da Costa, Gary S.

AU - de Grijs, Richard

AU - Feuillet, Diane

AU - Horner, Jonathan

AU - Kafle, Prajwal R.

AU - Khanna, Shourya

AU - Kobayashi, Chiaki

AU - Liu, Fan

AU - Montet, Benjamin T.

AU - Nandakumar, Govind

AU - Nataf, David M.

AU - Ness, Melissa K.

AU - Spina, Lorenzo

AU - Tepper-García, Thor

AU - Ting, Yuan-Sen

AU - Traven, Gregor

AU - Vogrinčič, Rok

AU - Wittenmyer, Robert A.

AU - Wyse, Rosemary F. G.

AU - Žerjal, Maruša

N1 - This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society, Volume 506, Issue 1, September 2021, Pages 150–201, https://doi.org/10.1093/mnras/stab1242. Copyright 2021 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

PY - 2021/9

Y1 - 2021/9

N2 - 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.

AB - 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.

KW - methods: data analysis

KW - methods: observational

KW - surveys

KW - stars: abundances

KW - stars: fundamental parameters

U2 - 10.1093/mnras/stab1242

DO - 10.1093/mnras/stab1242

M3 - Article

VL - 506

SP - 150

EP - 201

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 1365-2966

IS - 1

ER -

The GALAH plus survey: Third data release

Abstract

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Keywords

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