A Warm Jupiter Transiting an M Dwarf: A TESS Single-transit Event Confirmed with the Habitable-zone Planet Finder

Canas, Caleb I.; Stefansson, Gudmundur; Kanodia, Shubham; Mahadevan, Suvrath; Cochran, William D.; Endl, Michael; Robertson, Paul; Bender, Chad F.; Ninan, Joe P.; Beard, Corey; Lubin, Jack; Gupta, Arvind F.; Everett, Mark E.; Monson, Andrew; Wilson, Robert F.; Lewis, Hannah M.; Brewer, Mary; Majewski, Steven R.; Hebb, Leslie; Dawson, Rebekah I.; Diddams, Scott A.; Ford, Eric B.; Fredrick, Connor; Halverson, Samuel; Hearty, Fred; Lin, Andrea S. J.; Metcalf, Andrew J.; Rajagopal, Jayadev; Ramsey, Lawrence W.; Roy, Arpita; Schwab, Christian; Terrien, Ryan C.; Wright, Jason T.

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Cañas_2020_AJ_160_147.pdf

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IOP PUBLISHING LTD

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Cañas, C. I., Stefansson, G., Kanodia, S., Mahadevan, S., Cochran, W. D., Endl, M., ... & Wright, J. T. (2020). A Warm Jupiter Transiting an M Dwarf: A TESS Single-transit Event Confirmed with the Habitable-zone Planet Finder. The Astronomical Journal, 160(3), 147.

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ASTRONOMICAL JOURNAL

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This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.

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; and speckle and adaptive optics imaging. The data reveal a transiting companion on an similar to 29 day orbit with a mass and radius of 0.66 +/- 0.07 M-J and 1.15(-0.05)(+0.04) R-J, respectively. The star, 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 similar to 362 K) gas giant orbiting an M0 star. Our observations reveal that 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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Immediate access

ISSN

0004-6256

EISSN

1538-3881

DOI

10.3847/1538-3881/abac67

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Final published version

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UA Faculty Publications