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

Bryant, Edward M.; Bayliss, Daniel; Hartman, Joel D.; Sedaghati, Elyar; Hobson, Melissa J.; Jordán, Andrés; Brahm, Rafael; Bakos, Gaspar Á.; Almenara, Jose Manuel; Barkaoui, Khalid; Bonfils, Xavier; Cointepas, Marion; Collins, Karen A.; Dransfield, Georgina; Evans, Phil; Gillon, Michaël; Jehin, Emmanuël; Murgas, Felipe; Pozuelos, Francisco J.; Schwarz, Richard P.; Timmermans, Mathilde; Watkins, Cristilyn N.; Wünsche, Anaël; Butler, R. Paul; Crane, Jeffrey D.; Shectman, Steve; Teske, Johanna K.; Charbonneau, David; Essack, Zahra; Jenkins, Jon M.; Lewis, Hannah M.; Seager, Sara; Ting, Eric B.; Winn, Joshua N.
Bibliographical reference

Monthly Notices of the Royal Astronomical Society

Advertised on:
10
2024
Number of authors
34
IAC number of authors
2
Citations
4
Refereed citations
2
Description
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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