The K2-HERMES Survey. I. Planet-candidate Properties from K2 Campaigns 1-3
Journal
Date Issued
2018
Author(s)
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.
•
•
Freeman, Ken
•
Martell, Sarah
•
Simpson, Jeffrey D.
•
Zucker, Daniel B.
•
Anguiano, Borja
•
Casagrande, Luca
•
Esdaile, James
•
Hon, Marc
•
Ireland, Michael
•
Kafle, Prajwal R.
•
•
Marshall, J. P.
•
Saddon, Mohd Hafiz Mohd
•
Traven, Gregor
•
Wright, Duncan
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.
Volume
155
Issue
2
Start page
84
Issn Identifier
0004-6256
Ads BibCode
2018AJ....155...84W
Rights
open.access
File(s)![Thumbnail Image]()
![Thumbnail Image]()
Loading...
Name
1712.06774.pdf
Description
preprint
Size
632.1 KB
Format
Adobe PDF
Checksum (MD5)
16ddeea62a1f5e9122b62f90558ce421
Loading...
Name
Wittenmyer_2018_AJ_155_84.pdf
Description
Pdf editoriale
Size
723.44 KB
Format
Adobe PDF
Checksum (MD5)
3a8b370ffab957c8f1b1b91e5b53a697