Psaridi, Angelica; Bouchy, François; Lendl, Monika; Akinsanmi, Babatunde; Stassun, Keivan G.; Smalley, Barry; Armstrong, David J.; Howard, Saburo; Ulmer-Moll, Solène; Grieves, Nolan; Barkaoui, Khalid; Rodriguez, Joseph E.; Bryant, Edward M.; Suárez, Olga; Guillot, Tristan; Evans, Phil; Attia, Omar; Wittenmyer, Robert A.; Yee, Samuel W.; Collins, Karen A.; ... (2023). Three Saturn-mass planets transiting F-type stars revealed with TESS and HARPS. Astronomy and astrophysics, 675, A39. EDP Sciences 10.1051/0004-6361/202346406
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While the sample of confirmed exoplanets continues to grow, 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
−0.06 RJup and 0.43+0.09
−0.08 MJup) in a 4.66 day orbit transiting a 6850 K star. TOI-622b
has a radius of 0.82+0.03
−0.03 RJup 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 0.39+0.02
−0.04 MJup 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
−0.64 RJup. 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 (Original Article) |
|---|---|
Division/Institute: |
08 Faculty of Science > Physics Institute > Space Research and Planetary Sciences > Theoretical Astrophysics and Planetary Science (TAPS) 08 Faculty of Science > Physics Institute > Space Research and Planetary Sciences 08 Faculty of Science > Physics Institute |
UniBE Contributor: |
Ulmer-Moll, Solène Chloé, Mordasini, Christoph |
Subjects: |
500 Science > 520 Astronomy 600 Technology > 620 Engineering 500 Science > 530 Physics |
ISSN: |
0004-6361 |
Publisher: |
EDP Sciences |
Language: |
English |
Submitter: |
Dora Ursula Zimmerer |
Date Deposited: |
27 Oct 2023 07:37 |
Last Modified: |
27 Oct 2023 07:37 |
Publisher DOI: |
10.1051/0004-6361/202346406 |
BORIS DOI: |
10.48350/187487 |
URI: |
https://boris.unibe.ch/id/eprint/187487 |
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