TESS Discovery of an Ultra-short-period Planet around the Nearby M Dwarf LHS 3844
TESS Discovery of an Ultra-short-period Planet around the Nearby M Dwarf LHS 3844
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DOI：
10.3847/2041-8213/aafb7a
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发表时间：
2018-09
期刊：
影响因子：
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通讯作者：
R. Vanderspek;Chelsea X. Huang;A. Vanderburg;G. Ricker;D. Latham;S. Seager;J. Winn;J. Jenkins
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文献类型：
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作者：
R. Vanderspek;Chelsea X. Huang;A. Vanderburg;G. Ricker;D. Latham;S. Seager;J. Winn;J. Jenkins
来自新投入使用的凌日系外行星勘测卫星的数据显示，LHS 3844 周围有一个“热地球”，一颗 M 矮星位于 15 颗星之外。该行星的半径为 R⊕，每 11 小时绕恒星运行一次。尽管这样一颗受到强烈辐射的行星周围是否存在大气层值得怀疑，但这颗恒星足够明亮（I = 11.9，K = 9.1），可以通过凌日和掩星光谱来研究这种可能性。恒星的亮度和行星的短周期也将有助于通过多普勒光谱测量行星的质量。
Data from the newly commissioned Transiting Exoplanet Survey Satellite has revealed a “hot Earth” around LHS 3844, an M dwarf located 15 pc away. The planet has a radius of R⊕ and orbits the star every 11 hr. Although the existence of an atmosphere around such a strongly irradiated planet is questionable, the star is bright enough (I = 11.9, K = 9.1) for this possibility to be investigated with transit and occultation spectroscopy. The star’s brightness and the planet’s short period will also facilitate the measurement of the planet’s mass through Doppler spectroscopy.