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)
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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2007.07098v1
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