TOI-2379 b and TOI-2384 b: two super-Jupiter mass planets transiting low-mass host stars
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2024
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| author | 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. |
| author_facet | 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. |
| contents | 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 TESS 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 $5.76\pm0.20$ M$_{J}$ and $1.046\pm0.023$ R$_{J}$ and TOI-2384 b has an orbital period of 2.136 d and a mass and radius of $1.966\pm0.059$ M$_{J}$ and $1.025\pm0.021$ 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_01239 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | 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. Earth and Planetary Astrophysics 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 TESS 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 $5.76\pm0.20$ M$_{J}$ and $1.046\pm0.023$ R$_{J}$ and TOI-2384 b has an orbital period of 2.136 d and a mass and radius of $1.966\pm0.059$ M$_{J}$ and $1.025\pm0.021$ 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. |
| title | TOI-2379 b and TOI-2384 b: two super-Jupiter mass planets transiting low-mass host stars |
| topic | Earth and Planetary Astrophysics |
| url | https://arxiv.org/abs/2409.01239 |