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TESS Discovery of an Ultra-short-period Planet around the Nearby M Dwarf LHS 3844
Vanderspek, Roland Crossfield, Ian
Vanderspek, Roland
Crossfield, Ian
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Abstract
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 $1.303\pm 0.022$ 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.
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Date
2019-01-25
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American Astronomical Society
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Keywords
Planetary systems, Planets and satellites: detection, Stars: individual (LHS 3844, TIC 410153553)
Citation
Roland Vanderspek et al 2019 ApJL 871 L24