The K2-HERMES Survey. I. Planet-candidate Properties from K2 Campaigns 1–3
Article
Article Title | The K2-HERMES Survey. I. Planet-candidate Properties from K2 Campaigns 1–3 |
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ERA Journal ID | 1048 |
Article Category | Article |
Authors | Wittenmyer, Robert A. (Author), Sharma, Sanjib (Author), Stello, Dennis (Author), Buder, Sven (Author), Kos, Janez (Author), Asplund, Martin (Author), Duong, Ly (Author), Lin, Jane (Author), Lind, Karin (Author), Ness, Melissa (Author), Zwitter, Tomaz (Author), Horner, Jonathan (Author), Clark, Jake (Author), Kane, Stephen R. (Author), Huber, Daniel (Author), Bland-Hawthorn, Joss (Author), Casey, Andrew R. (Author), de Silva, Gayandhi M. (Author), D’Orazi, Valentina (Author), Freeman, Ken (Author), Martell, Sarah (Author), Simpson, Jeffrey D. (Author), Zucker, Daniel B. (Author), Anguiano, Borja (Author), Casagrande, Luca (Author), Esdaile, James (Author), Hon, Marc (Author), Ireland, Michael (Author), Kafle, Prajwal R. (Author), Khanna, Shourya (Author), Marshall, J. P. (Author), Saddon, Mohd Hafiz Mohd (Author), Traven, Gregor (Author) and Wright, Duncan (Author) |
Journal Title | The Astronomical Journal |
Journal Citation | 155 (2), pp. 1-10 |
Article Number | 84 |
Number of Pages | 10 |
Year | 2018 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-6256 |
1538-3881 | |
Digital Object Identifier (DOI) | https://doi.org/10.3847/1538-3881/aaa3e4 |
Web Address (URL) | https://iopscience.iop.org/article/10.3847/1538-3881/aaa3e4 |
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 first results from the K2-HERMES project, which uses the HERMES multi-object spectrograph on the Anglo-Australian Telescope to obtain R ∼ 28000 spectra of up to 360 stars in one exposure. This ongoing project aims to derive self-consistent spectroscopic parameters for about half of K2 target stars. We present complete stellar parameters and isochrone-derived masses and radii for 46 stars hosting 57 K2 candidate planets in Campaigns 1-3. Our revised host-star radii cast severe doubt on three candidate planets: EPIC 201407812.01, EPIC 203070421.01, and EPIC 202843107.01, all of which now have inferred radii well in excess of the largest known inflated Jovian planets. |
Keywords | planets and satellites; stars; fundamental parameters; spectroscopic |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 519999. Other physical sciences not elsewhere classified |
Public Notes | For access to this article, please click on the URL link provided. |
Institution of Origin | University of Southern Queensland |
Byline Affiliations | Computational Engineering and Science Research Centre |
University of Sydney | |
Max Planck Society, Germany | |
Australian National University | |
University of Ljubljana, Slovenia | |
University of California, United States | |
Monash University | |
Australian Astronomical Observatory, Australia | |
National Institute for Astrophysics, Italy | |
University of New South Wales | |
Macquarie University | |
University of Western Australia | |
Academia Sinica, Taiwan |
https://research.usq.edu.au/item/q4xy8/the-k2-hermes-survey-i-planet-candidate-properties-from-k2-campaigns-1-3
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