A warm Jupiter transiting an M dwarf: A TESS single transit event confirmed with the Habitable-zone Planet Finder release_me3atiuxgfe7zaphsengyum4bm

by Caleb I. Cañas, Gudmundur Stefansson, Shubham Kanodia, Suvrath Mahadevan, William D. Cochran, Michael Endl, Paul Robertson, Chad F. Bender, Joe P. Ninan, Corey Beard, Jack Lubin, Arvind F. Gupta (+21 others)

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2020  

Abstract

We confirm the planetary nature of a warm Jupiter transiting the early M dwarf, TOI-1899, using a combination of available TESS photometry, high-precision, near-infrared spectroscopy with the Habitable-zone Planet Finder (HPF), and speckle and adaptive optics imaging. The data reveal a transiting companion on a ∼29-day orbit with a mass and radius of 0.66±0.07 M_J and 1.37_-0.06^+0.05 R_J, respectively. TOI-1899 is the lowest mass star known to host a transiting warm Jupiter and we discuss the follow-up opportunities afforded by a warm (T_eq∼362 K) gas giant orbiting an M0 star. Our observations reveal TOI-1899.01 is a puffy warm Jupiter and we suggest additional transit observations to both refine the orbit and constrain the true dilution observed in TESS.
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Date   2020-07-14
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arXiv  2007.07098v1
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