The GALAH survey: effective temperature calibration from the InfraRed Flux Method in the Gaia system
Article
Article Title | The GALAH survey: effective temperature calibration from the InfraRed Flux Method in the Gaia system |
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ERA Journal ID | 1074 |
Article Category | Article |
Authors | Casagrande, Luca (Author), Lin, Jane (Author), Rains, Adam D. (Author), Liu, Fan (Author), Buder, Sven (Author), Horner, Jonathan (Author), Asplund, Martin (Author), Lewis, Geraint F. (Author), Martell, Sarah L. (Author), Nordlander, Thomas (Author), Stello, Dennis (Author), Ting, Yuan-Sen (Author), Wittenmyer, Robert A. (Author), Bland-Hawthorn, Joss (Author), Casey, Andrew R. (Author), De Silva, Gayandhi M. (Author), D'Orazi, Valentina (Author), Freeman, Ken C. (Author), Hayden, Michael R. (Author), Kos, Janez (Author), Lind, Karin (Author), Schlesinger, Katharine J. (Author), Sharma, Sanjib (Author), Simpson, Jeffrey D. (Author), Zucker, Daniel B. (Author) and Zwitter, Tomaz (Author) |
Journal Title | Monthly Notices of the Royal Astronomical Society |
Journal Citation | 507 (2), pp. 2684-2696 |
Number of Pages | 13 |
Year | 2021 |
Publisher | Oxford University Press |
Place of Publication | United Kingdom |
ISSN | 0035-8711 |
1365-2966 | |
Digital Object Identifier (DOI) | https://doi.org/10.1093/mnras/stab2304 |
Web Address (URL) | https://academic.oup.com/mnras/article/507/2/2684/6347361 |
Abstract | In order to accurately determine stellar properties, knowledge of the effective temperature of stars is vital. We implement Gaia and 2MASS photometry in the InfraRed Flux Method and apply it to over 360000 stars across different evolutionary stages in the GALAH DR3 survey. We derive colour-effective temperature relations that take into account the effect of metallicity and surface gravity over the range 4000K less than or similar to T-eff less than or similar to 8000 K, from very metal-poor stars to supersolar metallicities. The internal uncertainty of these calibrations is of order 40-80 K depending on the colour combination used. Comparison against solar-twins, Gaia benchmark stars, and the latest interferometric measurements validates the precision and accuracy of these calibrations from F to early M spectral types. We assess the impact of various sources of uncertainties, including the assumed extinction law, and provide guidelines to use our relations. Robust solar colours are also derived. |
Keywords | techniques: photometric; stars: abundances; stars: atmospheres; stars: fundamental parameters; stars: Hertzsprung-Russell and colour-; magnitude diagrams; infrared: stars; Astrophysics - Solar and Stellar; Astrophysics; Astrophysics - Astrophysics of Galaxies; Astrophysics -; Instrumentation and Methods for Astrophysics |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
Public Notes | This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2021 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. |
Institution of Origin | University of Southern Queensland |
Byline Affiliations | Australian National University |
Swinburne University of Technology | |
Centre for Astrophysics | |
Max Planck Society, Germany | |
University of Sydney | |
University of New South Wales | |
ARC Centre of Excellence for All Sky Astrophysics in 3 Dimensions, Australia | |
Monash University | |
Macquarie University | |
National Institute for Astrophysics, Italy | |
University of Ljubljana, Slovenia | |
Stockholm University, Sweden |
https://research.usq.edu.au/item/q6wqy/the-galah-survey-effective-temperature-calibration-from-the-infrared-flux-method-in-the-gaia-system
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