TOI-2379 b and TOI-2384 b: two super-Jupiter mass planets transiting low-mass host stars

ABSTRACT Short-period gas giant planets have been shown to be significantly rarer for host stars less massive than the Sun. We report the discovery of two transiting giant planets – TOI-2379 b and TOI-2384 b – with low-mass (early M) host stars. Both planets were detected using Transiting Exoplanet Survey Satellite photometry and for both the transit signal was validated using ground-based photometric facilities. We confirm the planetary nature of these companions and measure their masses using radial velocity observations. We find that TOI-2379 b has an orbital period of 5.469 d and a mass and radius of $5.76\pm 0.20$ M$_{J}$ and $1.046\pm 0.023$ R$_{J}$ and TOI-2384 b has an orbital period of 2.136 d and a mass and radius of $1.966\pm 0.059$ M$_{J}$ and $1.025\pm 0.021$ R$_{J}$. TOI-2379 b and TOI-2384 b have the highest and third highest planet-to-star mass ratios, respectively, out of all transiting exoplanets with a low-mass host star, placing them uniquely among the population of known exoplanets and making them highly important pieces of the puzzle for understanding the extremes of giant planet formation.

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Publication Details

Journal
Monthly Notices of the Royal Astronomical Society
Published
2024-08-29
DOI
https://doi.org/10.1093/mnras/stae2034
Citations
6
Primary Topic
Stellar, planetary, and galactic studies
Type
article
Field-Weighted Citation Impact
1.99

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article

TOI-2379 b and TOI-2384 b: two super-Jupiter mass planets transiting low-mass host stars

Jon M. Jenkins, M. Gillon, F. J. Pozuelos, F. Murgas et al.
6 citations
Monthly Notices of the Royal Astronomical Society
Stellar, planetary, and galactic studies
1.99
article

TOI-2379 b and TOI-2384 b: two super-Jupiter mass planets transiting low-mass host stars

Jon M. Jenkins, M. Gillon, F. J. Pozuelos, F. Murgas, Emmanuël Jehin, Rafael Brahm, Phil Evans, Daniel Bayliss, Georgina Dransfield, A. Wünsche, J. D. Hartman, X. Bonfıls, R. Paul Butler, Karen A. Collins, Zahra Essack, Eric B. Ting, Sara Seager, Hannah M. Lewis, Marion Cointepas, Jeffrey D. Crane, Richard P. Schwarz, Johanna Teske, Mathilde Timmermans, David Charbonneau, Elyar Sedaghati, Khalid Barkaoui, Andrés Jordán, Edward M. Bryant, G. Á. Bakos, Mélissa J. Hobson, Steve Shectman, Cristilyn N. Watkins, J. M. Almenara, Joshua N. Winn
article en
6 citations

Abstract

ABSTRACT Short-period gas giant planets have been shown to be significantly rarer for host stars less massive than the Sun. We report the discovery of two transiting giant planets – TOI-2379 b and TOI-2384 b – with low-mass (early M) host stars. Both planets were detected using Transiting Exoplanet Survey Satellite photometry and for both the transit signal was validated using ground-based photometric facilities. We confirm the planetary nature of these companions and measure their masses using radial velocity observations. We find that TOI-2379 b has an orbital period of 5.469 d and a mass and radius of $5.76\pm 0.20$ M$_{J}$ and $1.046\pm 0.023$ R$_{J}$ and TOI-2384 b has an orbital period of 2.136 d and a mass and radius of $1.966\pm 0.059$ M$_{J}$ and $1.025\pm 0.021$ R$_{J}$. TOI-2379 b and TOI-2384 b have the highest and third highest planet-to-star mass ratios, respectively, out of all transiting exoplanets with a low-mass host star, placing them uniquely among the population of known exoplanets and making them highly important pieces of the puzzle for understanding the extremes of giant planet formation.

Monthly Notices of the Royal Astronomical SocietyVol. 533(4)
University of Geneva (CH), Ames Research Center (US), Centre National de la Recherche Scientifique (FR), Space Telescope Science Institute (US), Planetary Science Institute (US), University of Liège (BE), Universidad de La Laguna (ES), University of New Mexico (US), Carnegie Institution for Science (US), Princeton University (US), Adolfo Ibáñez University (CL), University of Warwick (GB), Millennium Institute of Astrophysics (CL), Max Planck Institute for Astronomy (DE), Center for Astrophysics Harvard & Smithsonian (US), Carnegie Observatories (US), European Southern Observatory (CL), Instituto de Astrofísica de Canarias (ES), Instituto de Astrofísica de Andalucía (ES), Data Observatory Foundation, University College London (GB), American Institute of Aeronautics and Astronautics (US), Massachusetts Institute of Technology (US), University of Birmingham (GB), Université Grenoble Alpes (FR)
National Science Foundation, National Aeronautics and Space Administration, California Institute of Technology, Space Telescope Science Institute, Fonds De La Recherche Scientifique - FNRS, Fédération Wallonie-Bruxelles, Ministry of Science, ICT and Future Planning, Nuclear Safety and Security Commission, Ames Research Center, Science Mission Directorate, Science and Technology Facilities Council, Fonds pour la Formation à la Recherche dans l’Industrie et dans l’Agriculture
Openalex Percentile: Top 14%
Stellar, planetary, and galactic studies
1.99
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