文章基本信息

标题：A Hot Mars-sized Exoplanet Transiting an M Dwarf
本地全文：下载
作者：Caleb I.Cañas ; Suvrath Mahadevan ; William D.Cochran 等
期刊名称：The Astronomical journal
印刷版ISSN：0004-6256
电子版ISSN：1538-3881
出版年度：2021
卷号：163
期号：1
页码：1-15
DOI：10.3847/1538-3881/ac3088
语种：English
出版社：American Institute of Physics
摘要：We validate the planetary nature of an ultra-short-period planet orbiting the M dwarf KOI-4777. We use a combination of space-based photometry from Kepler, high-precision, near-infrared Doppler spectroscopy from the Habitable-zone Planet Finder, and adaptive optics imaging to characterize this system. KOI-4777.01 is a Mars-sized exoplanet (Rp = 0.51 ± 0.03R⊕) orbiting the host star every 0.412 days (∼9.9 hr). This is the smallest validated ultra-short period planet known and we see no evidence for additional massive companions using our HPF RVs. We constrain the upper 3σ mass to Mp < 0.34 M⊕ by assuming the planet is less dense than iron. Obtaining a mass measurement for KOI-4777.01 is beyond current instrumental capabilities.