Detailed Record


TOI-5344 b: A Saturn-like Planet Orbiting a Super-solar Metallicity M0 Dwarf


Abstract We confirm the planetary nature of TOI-5344 b as a transiting giant exoplanet around an M0-dwarf star. TOI-5344 b was discovered with the Transiting Exoplanet Survey Satellite photometry and confirmed with ground-based photometry (the Red Buttes Observatory 0.6 m telescope), radial velocity (the Habitable-zone Planet Finder), and speckle imaging (the NN-Explore Exoplanet Stellar Speckle Imager). TOI-5344 b is a Saturn-like giant planet ( ρ = 0.80 {-0.15}^{+0.17} g cm −3 ) with a planetary radius of 9.7 ± 0.5 R ⊕ (0.87 ± 0.04 R Jup ) and a planetary mass of{135}_{-18}^{+17} M⊕} (0.42 {-0.06}^{+0.05} {M}_{Jup}). It has an orbital period of {3.792622}_{-0.000010}^{+0.000010} days and an orbital eccentricity of {0.06}_{-0.04}^{+0.07}. We measure a high metallicity for TOI-5344 of [Fe/H] = 0.48 ± 0.12, where the high metallicity is consistent with expectations from formation through core accretion. We compare the metallicity of the M-dwarf hosts of giant exoplanets to that of M-dwarf hosts of nongiants (≲8 R ⊕ ). While the two populations appear to show different metallicity distributions, quantitative tests are prohibited by various sample caveats.
Authors Te Han ORCID , Paul Robertson ORCID , Shubham Kanodia ORCID , Caleb I. Cañas ORCID , Andrea S. J. Lin ORCID , Guðmundur Stefánsson ORCID , Jessica E. Libby-Roberts ORCID , Alexander Larsen University of WyomingORCID , Henry A. Kobulnicky University of WyomingORCID , Suvrath Mahadevan ORCID , Chad F. Bender ORCID , William D. Cochran ORCID , Michael Endl ORCID , Mark E. Everett ORCID , Arvind F. Gupta ORCID , Samuel Halverson ORCID , Fred Hearty ORCID , Andrew Monson ORCID , Joe P. Ninan ORCID , Arpita Roy ORCID , Christian Schwab ORCID , Ryan C. Terrien ORCID
Journal Info Institute of Physics | The Astronomical Journal , vol: 167 , iss: 1 , pages: 4 - 4
Publication Date 12/4/2023
ISSN 0004-6256
TypeKeyword Image article
Open Access gold Gold Access
DOI https://doi.org/10.3847/1538-3881/ad09c2
KeywordsKeyword Image Extraterrestrial Organic Matter (Score: 0.441327)