TOI-3984 A b and TOI-5293 A b: Two Temperate Gas Giants Transiting Mid-M Dwarfs in Wide Binary Systems

Cañas, Caleb I. and Kanodia, Shubham and Libby-Roberts, Jessica and Lin, Andrea S. J. and Schutte, Maria and Powers, Luke and Jones, Sinclaire and Monson, Andrew and Wang, Songhu and Stefánsson, Guđmundur and Cochran, William D. and Robertson, Paul and Mahadevan, Suvrath and Kowalski, Adam F. and Wisniewski, John and Parker, Brock A. and Larsen, Alexander and Chapman, Franklin A. L. and Kobulnicky, Henry A. and Gupta, Arvind F. and Everett, Mark E. and Penprase, Bryan Edward and Zeimann, Gregory and Beard, Corey and Bender, Chad F. and Colón, Knicole D. and Diddams, Scott A. and Fredrick, Connor and Halverson, Samuel and Ninan, Joe P. and Ramsey, Lawrence W. and Roy, Arpita and Schwab, Christian (2023) TOI-3984 A b and TOI-5293 A b: Two Temperate Gas Giants Transiting Mid-M Dwarfs in Wide Binary Systems. The Astronomical Journal, 166 (1). p. 30. ISSN 0004-6256

[thumbnail of Cañas_2023_AJ_166_30.pdf] Text
Cañas_2023_AJ_166_30.pdf - Published Version

Download (9MB)

Abstract

We confirm the planetary nature of two gas giants discovered by TESS to transit M dwarfs with stellar companions at wide separations. TOI-3984 A (J = 11.93) is an M4 dwarf hosting a short-period (4.353326 ± 0.000005 days) gas giant (Mp = 0.14 ± 0.03 MJ and Rp = 0.71 ± 0.02 RJ) with a wide-separation white dwarf companion. TOI-5293 A (J = 12.47) is an M3 dwarf hosting a short-period (2.930289 ± 0.000004 days) gas giant (Mp = 0.54 ± 0.07 MJ and Rp = 1.06 ± 0.04 RJ) with a wide-separation M dwarf companion. We characterize both systems using a combination of ground- and space-based photometry, speckle imaging, and high-precision radial velocities from the Habitable-zone Planet Finder and NEID spectrographs. TOI-3984 A b (Teq = 563 ± 15 K and $\mathrm{TSM}={138}_{-27}^{+29}$) and TOI-5293 A b (${T}_{\mathrm{eq}}={675}_{-30}^{+42}$ K and TSM = 92 ± 14) are two of the coolest gas giants among the population of hot Jupiter–sized gas planets orbiting M dwarfs and are favorable targets for atmospheric characterization of temperate gas giants and 3D obliquity measurements to probe system architecture and migration scenarios.

Item Type: Article
Subjects: Pustaka Library > Physics and Astronomy
Depositing User: Unnamed user with email support@pustakalibrary.com
Date Deposited: 16 Nov 2023 06:26
Last Modified: 16 Nov 2023 06:26
URI: http://archive.bionaturalists.in/id/eprint/1874

Actions (login required)

View Item
View Item