The Astronomical Journal (Jan 2024)
Searching for GEMS: TOI-6383Ab, a Giant Planet Transiting an M3-dwarf Star in a Binary System
- Lia Marta Bernabò,
- Shubham Kanodia,
- Caleb I. Cañas,
- William D. Cochran,
- Szilárd Csizmadia,
- Suvrath Mahadevan,
- Gudhmundur Stefánsson,
- Arvind F. Gupta,
- Andrew Monson,
- Henry A. Kobulnicky,
- Alexander K. Larsen,
- Ethan G. Cotter,
- Alexina Birkholz,
- Tera N. Swaby,
- Gregory Zeimann,
- Chad F. Bender,
- Scott A. Diddams,
- Jessica E. Libby-Roberts,
- Andrea S. J. Lin,
- Joe P. Ninan,
- Heike Rauer,
- Varghese Reji,
- Paul Robertson,
- Arpita Roy,
- Christian Schwab
Affiliations
- Lia Marta Bernabò
- ORCiD
- Institute of Planetary Research, German Aerospace Center (DLR) , Rutherfordstrasse 2, 12489 Berlin, Germany ; [email protected], [email protected]; McDonald Observatory and Department of Astronomy, The University of Texas at Austin , USA
- Shubham Kanodia
- ORCiD
- Earth and Planets Laboratory, Carnegie Science , 5241 Broad Branch Road, NW, Washington, DC 20015, USA
- Caleb I. Cañas
- ORCiD
- NASA Goddard Space Flight Center , 8800 Greenbelt Road, Greenbelt, MD 20771, USA
- William D. Cochran
- ORCiD
- McDonald Observatory and Department of Astronomy, The University of Texas at Austin , USA; Center for Planetary Systems Habitability, The University of Texas at Austin , USA
- Szilárd Csizmadia
- ORCiD
- Institute of Planetary Research, German Aerospace Center (DLR) , Rutherfordstrasse 2, 12489 Berlin, Germany ; [email protected], [email protected]; HUN-REN-SZTE Stellar Astrophysics Research Group , H-6500 Baja, Szegedi út Kt. 766, Hungary
- 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; ETH Zürich, Institute for Particle Physics & Astrophysics , Switzerland
- Gudhmundur Stefánsson
- ORCiD
- Anton Pannekoek Institute for Astronomy, University of Amsterdam , Science Park 904, 1098 XH Amsterdam, The Netherlands
- Arvind F. Gupta
- ORCiD
- U.S. National Science Foundation National Optical-Infrared Astronomy Research Laboratory , 950 N. Cherry Avenue, Tucson, AZ 85719, USA
- Andrew Monson
- ORCiD
- Steward Observatory, The University of Arizona , 933 N. Cherry Avenue, Tucson, AZ 85721, USA
- Henry A. Kobulnicky
- ORCiD
- Department of Physics & Astronomy, University of Wyoming , Laramie, WY 82070, USA
- Alexander K. Larsen
- ORCiD
- Department of Physics & Astronomy, University of Wyoming , Laramie, WY 82070, USA
- Ethan G. Cotter
- ORCiD
- Department of Physics & Astronomy, University of Wyoming , Laramie, WY 82070, USA
- Alexina Birkholz
- Department of Physics & Astronomy, University of Wyoming , Laramie, WY 82070, USA
- Tera N. Swaby
- ORCiD
- Department of Physics & Astronomy, University of Wyoming , Laramie, WY 82070, USA
- Gregory Zeimann
- ORCiD
- Hobby Eberly Telescope, University of Texas at Austin , TX 78712, USA
- Chad F. Bender
- ORCiD
- Steward Observatory, The University of Arizona , 933 N. Cherry Avenue, Tucson, AZ 85721, USA
- Scott A. Diddams
- ORCiD
- Electrical, Computer & Energy Engineering, University of Colorado , 425 UCB, Boulder, CO 80309, USA; Department of Physics, University of Colorado , 2000 Colorado Avenue, Boulder, CO 80309, 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
- 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
- Joe P. Ninan
- ORCiD
- Department of Astronomy and Astrophysics, Tata Institute of Fundamental Research , Homi Bhabha Road, Colaba, Mumbai 400005, India
- Heike Rauer
- ORCiD
- Institute of Planetary Research, German Aerospace Center (DLR) , Rutherfordstrasse 2, 12489 Berlin, Germany ; [email protected], [email protected]; Institut für Geologische Wissenschaften, Freie Universität Berlin , 12249 Berlin, Germany
- Varghese Reji
- ORCiD
- Department of Astronomy and Astrophysics, Tata Institute of Fundamental Research , Homi Bhabha Road, Colaba, Mumbai 400005, India
- Paul Robertson
- ORCiD
- Department of Physics & Astronomy, University of California Irvine , Irvine, CA 92697, USA
- Arpita Roy
- ORCiD
- Astrophysics & Space Institute , Schmidt Sciences, New York, NY 10011, USA
- Christian Schwab
- ORCiD
- School of Mathematical and Physical Sciences, Macquarie University , Balaclava Road, North Ryde, NSW 2109, Australia
- DOI
- https://doi.org/10.3847/1538-3881/ad7fe8
- Journal volume & issue
-
Vol. 168,
no. 6
p. 273
Abstract
We report on the discovery of a transiting giant planet around the 3500 K M3-dwarf star TOI-6383A located 172 pc from Earth. It was detected by the Transiting Exoplanet Survey Satellite and confirmed by a combination of ground-based follow-up photometry and precise radial velocity measurements. This planet has an orbital period of ∼1.791 days, a mass of 1.040 ± 0.094 M _J , and a radius of ${1.008}_{-0.033}^{+0.036}\,{R}_{J}$ , resulting in a mean bulk density of ${1.26}_{-0.17}^{+0.18}$ g cm ^−3 . TOI-6383A has an M dwarf companion star, TOI-6383B, which has a stellar effective temperature of T _eff ∼ 3100 K and a projected orbital separation of 3126 au. TOI-6383A is a low-mass dwarf star hosting a giant planet and is an intriguing object for planetary evolution studies due to its high planet-to-star mass ratio. This discovery is part of the Searching for Giant Exoplanets around M-dwarf Stars (GEMS) Survey, intending to provide robust and accurate estimates of the occurrence of GEMS and the statistics on their physical and orbital parameters. This paper presents an interesting addition to the small number of confirmed GEMS, particularly notable since its formation necessitates massive, dust-rich protoplanetary discs and high accretion efficiency (>10%).
Keywords
- Exoplanet astronomy
- Exoplanet detection methods
- Exoplanet formation
- Exoplanets
- Planet hosting stars
- Multiple stars
