文章基本信息

标题：The K2-HERMES Survey. I. Planet-candidate Properties from K2 Campaigns 1–3
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作者：Robert A. Wittenmyer ; Sanjib Sharma ; Dennis Stello 等
期刊名称：The Astronomical journal
印刷版ISSN：0004-6256
电子版ISSN：1538-3881
出版年度：2018
卷号：155
期号：2
页码：1-10
DOI：10.3847/1538-3881/aaa3e4
语种：English
出版社：American Institute of Physics
摘要：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 selfconsistent 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.
关键词：planets and satellites: fundamental parameters;stars: fundamental parameters;techniques: spectroscopic