K2-HERMES II. Planet-candidate properties from K2 Campaigns 1-13
Article
Article Title | K2-HERMES II. Planet-candidate properties from K2 Campaigns 1-13 |
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ERA Journal ID | 1074 |
Article Category | Article |
Authors | Wittenmyer, Robert A. (Author), Clark, Jake T. (Author), Sharma, Sanjib (Author), Stello, Dennis (Author), Horner, Jonathan (Author), Kane, Stephen R. (Author), Stevens, Catherine P. (Author), Wright, Duncan J. (Author), Spina, Lorenzo (Author), Cotar, Klemen (Author), Asplund, Martin (Author), Bland-Hawthorn, Joss (Author), Buder, Sven (Author), Casey, Andrew R. (Author), de Silva, Gayandhi M. (Author), D'Orazi, Valentina (Author), Freeman, Ken (Author), Kos, Janez (Author), Lewis, Geraint (Author), Lin, Jane (Author), Lind, Karin (Author), Martell, Sarah L. (Author), Simpson, Jeffrey D. (Author), Zucker, Daniel B. (Author) and Zwitter, Tomaz (Author) |
Journal Title | Monthly Notices of the Royal Astronomical Society |
Journal Citation | 496 (1), pp. 851-863 |
Number of Pages | 13 |
Year | 2020 |
Publisher | Oxford University Press |
Place of Publication | United Kingdom |
ISSN | 0035-8711 |
1365-2966 | |
Digital Object Identifier (DOI) | https://doi.org/10.1093/mnras/staa1528 |
Web Address (URL) | https://academic.oup.com/mnras/article/496/1/851/5850765 |
Abstract | Accurate and precise radius estimates of transiting exoplanets are critical for understanding their compositions and formation mechanisms. To know the planet, we must know the host star in as much detail as possible. We present complete results for planet-candidate hosts from the K2-HERMES survey, which uses the HERMES multi-object spectrograph on the Anglo-Australian Telescope to obtain R∼28000 spectra for more than 30000 K2 stars. We present complete host-star parameters and planet-candidate radii for 224 K2 candidate planets from C1–C13. Our results cast severe doubt on 30 K2 candidates, as we derive unphysically large radii, larger than 2RJup. This work highlights the importance of obtaining accurate, precise, and self-consistent stellar parameters for ongoing large planet search programs – something that will only become more important in the coming years, as TESS begins to deliver its own harvest of exoplanets. |
Keywords | techniques: spectroscopic; planets and satellites: fundamental; parameters; stars: fundamental parameters; Astrophysics - Earth and; Planetary Astrophysics; Astrophysics - Astrophysics of Galaxies; Astrophysics - Solar and Stellar 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 ©: 2020 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 | Centre for Astrophysics |
University of Sydney | |
University of New South Wales | |
University of California, United States | |
Westminster College, United States | |
Monash University | |
University of Ljubljana, Slovenia | |
Australian National University | |
National Institute for Astrophysics, Italy | |
Max Planck Society, Germany | |
Macquarie University |
https://research.usq.edu.au/item/q5x0v/k2-hermes-ii-planet-candidate-properties-from-k2-campaigns-1-13
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