文章基本信息

标题：Planet Candidates from K2 Campaigns 5–8 and Follow-up Optical Spectroscopy
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作者：Erik A. Petigura ; Ian J. M. Crossfield ; Howard Isaacson 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：1
页码：1-14
DOI：10.3847/1538-3881/aa9b83
语种：English
出版社：American Institute of Physics
摘要：We present 151 planet candidates orbiting 141 stars from K2 campaigns 5–8 (C5–C8), identified through a systematic search of K2 photometry. In addition, we identify 16 targets as likely eclipsing binaries, based on their light curve morphology. We obtained follow-up optical spectra of 105/141 candidate host stars and 8/16 eclipsing binaries to improve stellar properties and to identify spectroscopic binaries. Importantly, spectroscopy enables measurements of host star radii with ≈10% precision, compared to ≈40% precision when only broadband photometry is available. The improved stellar radii enable improved planet radii. Our curated catalog of planet candidates provides a starting point for future efforts to confirm and characterize K2 discoveries.
关键词：planetary systems;planets and satellites: detection;planets and satellites: fundamental parameters;stars: abundances;stars: fundamental parameters;techniques: spectroscopic