TOI-3714 b and TOI-3629 b: Two Gas Giants Transiting M Dwarfs Confirmed with the Habitable-zone Planet Finder and NEID
Kobulnicky, Henry A.; Cochran, William D.; Mahadevan, Suvrath; Wisniewski, John; Wright, Jason T.; Logsdon, Sarah E.; Everett, Mark E.; Monson, Andrew; McElwain, Michael W.; Cañas, Caleb I.; Kanodia, Shubham; Ninan, Joe P.; Hebb, Leslie; Bender, Chad F.; Diddams, Scott A.; Fredrick, Connor; Metcalf, Andrew J.; Ramsey, Lawrence W.; Robertson, Paul; Roy, Arpita; Schwab, Christian; Terrien, Ryan C.; Hwang, Hsiang-Chih; Libby-Roberts, Jessica E.; Lin, Andrea S. J.; Beard, Corey; Blake, Cullen H.; Rajagopal, Jayadev; Green, Elizabeth M.; Gupta, Arvind F.; Parker, Brock A.; Stefánsson, Guđhmundur; Powers, Luke; Swaby, Tera N.; Jones, Sinclaire; Anjakos, Benjamin; Dong, Zehao; Hakemiamjad, Elnaz; Ruhle, Jacob
United States, India, Australia
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 ${3.936551}_{-0.000006}^{+0.000005}$ 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.