The K2-HERMES Survey. I. Planet-candidate Properties from K2 Campaigns 1-3

Wittenmyer, Robert A.; Sharma, Sanjib; Stello, Dennis; Buder, Sven; Kos, Janez; Asplund, Martin; Duong, Ly; Lin, Jane; Lind, Karin; Ness, Melissa; Zwitter, Tomaz; Horner, Jonathan; Clark, Jake; Kane, Stephen R.; Huber, Daniel; Bland-Hawthorn, Joss; Casey, Andrew R.; De Silva, Gayandhi M.; D'Orazi, Valentina; Freeman, Ken; Martell, Sarah; Simpson, Jeffrey D.; Zucker, Daniel B.; Anguiano, Borja; Casagrande, Luca; Esdaile, James; Hon, Marc; Ireland, Michael; Kafle, Prajwal R.; Khanna, Shourya; Marshall, J. P.; Saddon, Mohd Hafiz Mohd; Traven, Gregor; Wright, Duncan

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The K2-HERMES Survey. I. Planet-candidate Properties from K2 Campaigns 1-3

MPS-Authors

Wittenmyer, Robert A.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Sharma, Sanjib
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Stello, Dennis
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Buder, Sven
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Kos, Janez
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Asplund, Martin
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Duong, Ly
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Lin, Jane
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Lind, Karin
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Ness, Melissa
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Zwitter, Tomaz
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Horner, Jonathan
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Clark, Jake
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Kane, Stephen R.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Huber, Daniel
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Bland-Hawthorn, Joss
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Casey, Andrew R.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

De Silva, Gayandhi M.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

D'Orazi, Valentina
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Freeman, Ken
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Martell, Sarah
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Simpson, Jeffrey D.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Zucker, Daniel B.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Anguiano, Borja
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Casagrande, Luca
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Esdaile, James
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Hon, Marc
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Ireland, Michael
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Kafle, Prajwal R.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Khanna, Shourya
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Marshall, J. P.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Saddon, Mohd Hafiz Mohd
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Traven, Gregor
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Wright, Duncan
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

External Resource

https://ui.adsabs.harvard.edu/abs/2018AJ....155...84W
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Citation

Wittenmyer, R. A., Sharma, S., Stello, D., Buder, S., Kos, J., Asplund, M., et al. (2018). The K2-HERMES Survey. I. Planet-candidate Properties from K2 Campaigns 1-3. The Astronomical Journal, 155.

Cite as: https://hdl.handle.net/21.11116/0000-0005-CA3E-3

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.