The Astronomical Journal (Jan 2023)
TOI-5344 b: A Saturn-like Planet Orbiting a Super-solar Metallicity M0 Dwarf
- Te Han,
- Paul Robertson,
- Shubham Kanodia,
- Caleb Cañas,
- Andrea S. J. Lin,
- Gumundur Stefánsson,
- Jessica E. Libby-Roberts,
- Alexander Larsen,
- Henry A. Kobulnicky,
- Suvrath Mahadevan,
- Chad F. Bender,
- William D. Cochran,
- Michael Endl,
- Mark E. Everett,
- Arvind F. Gupta,
- Samuel Halverson,
- Fred Hearty,
- Andrew Monson,
- Joe P. Ninan,
- Arpita Roy,
- Christian Schwab,
- Ryan C. Terrien
Affiliations
- Te Han
- ORCiD
- Department of Physics & Astronomy, The University of California , Irvine, CA 92697, USA
- Paul Robertson
- ORCiD
- Department of Physics & Astronomy, The University of California , Irvine, CA 92697, USA
- Shubham Kanodia
- ORCiD
- Earth and Planets Laboratory, Carnegie Institution for Science , 5241 Broad Branch Road, NW, Washington, DC 20015, USA
- Caleb Cañas
- ORCiD
- NASA Goddard Space Flight Center , 8800 Greenbelt Road, Greenbelt, MD 20771, USA
- Andrea S. J. Lin
- ORCiD
- Department of Astronomy & Astrophysics, 525 Davey Laboratory, The Pennsylvania State University , University Park, PA 16802, USA; Center for Exoplanets and Habitable Worlds, 525 Davey Laboratory, The Pennsylvania State University , University Park, PA 16802, USA
- Gumundur Stefánsson
- ORCiD
- Department of Astrophysical Sciences, Princeton University , 4 Ivy Lane, Princeton, NJ 08540, USA
- Jessica E. Libby-Roberts
- ORCiD
- Department of Astronomy & Astrophysics, 525 Davey Laboratory, The Pennsylvania State University , University Park, PA 16802, USA; Center for Exoplanets and Habitable Worlds, 525 Davey Laboratory, The Pennsylvania State University , University Park, PA 16802, USA
- Alexander Larsen
- ORCiD
- Department of Physics & Astronomy, University of Wyoming , Laramie, WY 82070, USA
- Henry A. Kobulnicky
- ORCiD
- Department of Physics & Astronomy, University of Wyoming , Laramie, WY 82070, USA
- Suvrath Mahadevan
- ORCiD
- Department of Astronomy & Astrophysics, 525 Davey Laboratory, The Pennsylvania State University , University Park, PA 16802, USA; Center for Exoplanets and Habitable Worlds, 525 Davey Laboratory, The Pennsylvania State University , University Park, PA 16802, USA
- Chad F. Bender
- ORCiD
- Steward Observatory, University of Arizona , 933 N. Cherry Avenue, Tucson, AZ 85721, USA
- William D. Cochran
- ORCiD
- McDonald Observatory and Center for Planetary Systems Habitability, The University of Texas , Austin, TX 78712, USA
- Michael Endl
- ORCiD
- Department of Astronomy and McDonald Observatory, University of Texas at Austin , 2515 Speedway, Austin, TX 78712, USA
- Mark E. Everett
- ORCiD
- NSF's National Optical-Infrared Astronomy Research Laboratory , 950 N. Cherry Avenue, Tucson, AZ 85719, USA
- Arvind F. Gupta
- ORCiD
- Department of Astronomy & Astrophysics, 525 Davey Laboratory, The Pennsylvania State University , University Park, PA 16802, USA; Center for Exoplanets and Habitable Worlds, 525 Davey Laboratory, The Pennsylvania State University , University Park, PA 16802, USA
- Samuel Halverson
- ORCiD
- Jet Propulsion Laboratory , California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA
- Fred Hearty
- ORCiD
- Department of Astronomy & Astrophysics, 525 Davey Laboratory, The Pennsylvania State University , University Park, PA 16802, USA; Center for Exoplanets and Habitable Worlds, 525 Davey Laboratory, The Pennsylvania State University , University Park, PA 16802, USA
- Andrew Monson
- ORCiD
- Steward Observatory, University of Arizona , 933 N. Cherry Avenue, Tucson, AZ 85721, USA
- Joe P. Ninan
- ORCiD
- Department of Astronomy and Astrophysics, Tata Institute of Fundamental Research , Homi Bhabha Road, Colaba, Mumbai 400005, India
- Arpita Roy
- ORCiD
- Space Telescope Science Institute , 3700 San Martin Drive, Baltimore, MD 21218, USA; Department of Physics and Astronomy, Johns Hopkins University , 3400 N Charles Street, Baltimore, MD 21218, USA
- Christian Schwab
- ORCiD
- School of Mathematical and Physical Sciences, Macquarie University , Balaclava Road, North Ryde, NSW 2109, Australia
- Ryan C. Terrien
- ORCiD
- Carleton College , One North College Street, Northfield, MN 55057, USA
- DOI
- https://doi.org/10.3847/1538-3881/ad09c2
- Journal volume & issue
-
Vol. 167,
no. 1
p. 4
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 ${135}_{-18}^{+17}\ {M}_{\oplus }$ (0.42 ${}_{-0.06}^{+0.05}\ {M}_{\mathrm{Jup}}$ ). 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.
Keywords
