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Three Saturn-mass planets transiting F-type stars revealed with TESS and HARPS : TOI-615b, TOI-622b, and TOI-2641b
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(2023) Three Saturn-mass planets transiting F-type stars revealed with TESS and HARPS : TOI-615b, TOI-622b, and TOI-2641b. Astronomy and Astrophysics, 675 . A39. doi:10.1051/0004-6361/202346406 ISSN 0004-6361.
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Official URL: https://doi.org/10.1051/0004-6361/202346406
Abstract
While the sample of confirmed exoplanets continues to increase, the population of transiting exoplanets around early-type stars is still limited. These planets allow us to investigate the planet properties and formation pathways over a wide range of stellar masses and study the impact of high irradiation on hot Jupiters orbiting such stars. We report the discovery of TOI-615b, TOI-622b, and TOI-2641b, three Saturn-mass planets transiting main sequence, F-type stars. The planets were identified by the Transiting Exoplanet Survey Satellite (TESS) and confirmed with complementary ground-based and radial velocity observations. TOI-615b is a highly irradiated (∼1277 F⊕) and bloated Saturn-mass planet (1.69+0.05−0.06RJup and 0.43+0.09−0.08MJup) in a 4.66 day orbit transiting a 6850 K star. TOI-622b has a radius of 0.82+0.03−0.03RJup and a mass of 0.30+0.07−0.08~MJup in a 6.40 day orbit. Despite its high insolation flux (∼600 F⊕), TOI-622b does not show any evidence of radius inflation. TOI-2641b is a 0.37+0.05−0.04MJup planet in a 4.88 day orbit with a grazing transit (b = 1.04+0.05−0.06) that results in a poorly constrained radius of 1.61+0.46−0.64RJup. Additionally, TOI-615b is considered attractive for atmospheric studies via transmission spectroscopy with ground-based spectrographs and JWST. Future atmospheric and spin-orbit alignment observations are essential since they can provide information on the atmospheric composition, formation and migration of exoplanets across various stellar types.
Item Type: | Journal Article | ||||||||||||||||||||||||||||||||||||
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Subjects: | Q Science > QB Astronomy | ||||||||||||||||||||||||||||||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||||||||||||||||||||||||||||||
Library of Congress Subject Headings (LCSH): | Extrasolar planets -- Detection, F stars -- Spectra, Astrophysics, Astronomical photometry | ||||||||||||||||||||||||||||||||||||
Journal or Publication Title: | Astronomy and Astrophysics | ||||||||||||||||||||||||||||||||||||
Publisher: | EDP Sciences | ||||||||||||||||||||||||||||||||||||
ISSN: | 0004-6361 | ||||||||||||||||||||||||||||||||||||
Official Date: | July 2023 | ||||||||||||||||||||||||||||||||||||
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Volume: | 675 | ||||||||||||||||||||||||||||||||||||
Number of Pages: | 15 | ||||||||||||||||||||||||||||||||||||
Article Number: | A39 | ||||||||||||||||||||||||||||||||||||
DOI: | 10.1051/0004-6361/202346406 | ||||||||||||||||||||||||||||||||||||
Status: | Peer Reviewed | ||||||||||||||||||||||||||||||||||||
Publication Status: | Published | ||||||||||||||||||||||||||||||||||||
Access rights to Published version: | Open Access (Creative Commons) | ||||||||||||||||||||||||||||||||||||
Copyright Holders: | © The Authors 2023 | ||||||||||||||||||||||||||||||||||||
Date of first compliant deposit: | 5 May 2023 | ||||||||||||||||||||||||||||||||||||
Date of first compliant Open Access: | 11 May 2023 | ||||||||||||||||||||||||||||||||||||
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