TY - JOUR
T1 - K2-HERMES II. Planet-candidate properties from K2 Campaigns 1-13
AU - Wittenmyer, Robert A.
AU - Clark, Jake T.
AU - Sharma, Sanjib
AU - Stello, Dennis
AU - Horner, Jonathan
AU - Kane, Stephen R.
AU - Stevens, Catherine P.
AU - Wright, Duncan J.
AU - Spina, Lorenzo
AU - Čotar, Klemen
AU - Asplund, Martin
AU - Bland-Hawthorn, Joss
AU - Buder, Sven
AU - Casey, Andrew R.
AU - De Silva, Gayandhi M.
AU - D'Orazi, Valentina
AU - Freeman, Ken
AU - Kos, Janez
AU - Lewis, Geraint
AU - Lin, Jane
AU - Lind, Karin
AU - Martell, Sarah L.
AU - Simpson, Jeffrey D.
AU - Zucker, Daniel B.
AU - Zwitter, Tomaz
N1 - This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society, Volume 496, Issue 1, July 2020, Pages 851–863, https://doi.org/10.1093/mnras/staa1528. Copyright 2020 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
PY - 2020/7
Y1 - 2020/7
N2 - 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 30 000 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 2R Jup. 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.
AB - 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 30 000 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 2R Jup. 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.
KW - planets and satellites: fundamental parameters
KW - stars: fundamental parameters
KW - techniques: spectroscopic
UR - http://www.scopus.com/inward/record.url?scp=85088582948&partnerID=8YFLogxK
UR - http://purl.org/au-research/grants/arc/DP150100250
UR - http://purl.org/au-research/grants/arc/DP160103747
UR - http://purl.org/au-research/grants/arc/CE170100013
U2 - 10.1093/mnras/staa1528
DO - 10.1093/mnras/staa1528
M3 - Article
SN - 0035-8711
VL - 496
SP - 851
EP - 863
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
IS - 1
ER -