TOI-3714 b and TOI-3629 b: Two Gas Giants Transiting M Dwarfs Confirmed with the Habitable-zone Planet Finder and NEID
Caleb I. Cañas, Shubham Kanodia, Chad F. Bender, Suvrath Mahadevan, Guđhmundur Stefánsson, William D. Cochran, Andrea S. J. Lin, Hsiang-Chih Hwang, Luke Powers, Andrew Monson, Elizabeth M. Green, Brock A. Parker, Tera N. Swaby, Henry A. Kobulnicky, John P. Wisniewski, Arvind F. Gupta, Mark E. Everett, Sinclaire Jones, Benjamin Anjakos, Corey Beard, Cullen H. Blake, Scott A. Diddams, Zehao Dong, Connor Fredrick, Elnaz Hakemiamjad, Leslie Hebb, Jessica E. Libby-Roberts, Sarah E. Logsdon, Michael W. McElwain, Andrew J. Metcalf, Joe P. Ninan, Jayadev Rajagopal, Lawrence W. Ramsey, Paul Robertson, Arpita Roy, Jacob Ruhle, Christian Schwab, Ryan C. Terrien, Jason T. Wright
Abstract
Abstract We confirm the planetary nature of two gas giants discovered by the Transiting Exoplanet Survey Satellite to transit M dwarfs. TOI-3714 ( V = 15.24, J = 11.74) is an M2 dwarf hosting a hot Jupiter ( M p = 0.70 ± 0.03 M J and R p = 1.01 ± 0.03 R J ) on an orbital period of 2.154849 ± 0.000001 days with a resolved white dwarf companion. TOI-3629 ( V = 14.63, J = 11.42) is an M1 dwarf hosting a hot Jupiter ( M p = 0.26 ± 0.02 M J and R p =0.74 ± 0.02 R J ) on an orbital period of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msubsup> <mml:mrow> <mml:mn>3.936551</mml:mn> </mml:mrow> <mml:mrow> <mml:mo>−</mml:mo> <mml:mn>0.000006</mml:mn> </mml:mrow> <mml:mrow> <mml:mo>+</mml:mo> <mml:mn>0.000005</mml:mn> </mml:mrow> </mml:msubsup> </mml:math> days. We characterize each transiting companion using a combination of ground-based and space-based photometry, speckle imaging, and high-precision velocimetry from the Habitable-zone Planet Finder and the NEID spectrographs. With the discovery of these two systems, there are now nine M dwarfs known to host transiting hot Jupiters. Among this population, TOI-3714 b ( T eq = 750 ± 20 K and TSM = 98 ± 7) and TOI-3629 b ( T eq = 690 ± 20 K and TSM = 80 ± 9) are warm gas giants amenable to additional characterization with transmission spectroscopy to probe atmospheric chemistry and, for TOI-3714, obliquity measurements to probe formation scenarios.