The K2-HERMES Survey. I. Planet-candidate properties from K2 campaigns 1-3
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-ob...
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| Main Authors: | , |
|---|---|
| Format: | Article (Journal) |
| Language: | English |
| Published: |
2018 January 24
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| In: |
The astronomical journal
Year: 2018, Volume: 155 |
| ISSN: | 1538-3881 |
| DOI: | 10.3847/1538-3881/aaa3e4 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.3847/1538-3881/aaa3e4
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| Author Notes: | Robert A. Wittenmyer, Sanjib Sharma, Dennis Stello, Sven Buder, Janez Kos, Martin Asplund, Ly Duong, Jane Lin, Karin Lind, Melissa Ness, Tomaz Zwitter, Jonathan Horner, Jake Clark, Stephen R. Kane, Daniel Huber, Joss Bland-Hawthorn, Andrew R. Casey, Gayandhi M. De Silva, Valentina D'Orazi, Ken Freeman, Sarah Martell, Jeffrey D. Simpson, Daniel B. Zucker, Borja Anguiano, Luca Casagrande, James Esdaile, Marc Hon, Michael Ireland, Prajwal R. Kafle, Shourya Khanna, J.P. Marshall, Mohd Hafiz Mohd Saddon, Gregor Traven, and Duncan Wright |
MARC
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| 520 | |a 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. | ||
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