In:
Astronomy & Astrophysics, EDP Sciences, Vol. 675 ( 2023-7), p. A39-
Abstract:
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 −0.06 +0.05 R Jup and 0.43 −0.08 +0.09 M Jup ) in a 4.66 day orbit transiting a 6850 K star. TOI-622b has a radius of 0.82 −0.03 +0.03 R Jup and a mass of 0.30 −0.08 +0.07 M Jup 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 −0.04 +0.02 M Jup planet in a 4.88 day orbit with a grazing transit (b = 1.04 −0.06 +0.05 ) that results in a poorly constrained radius of 1.61 −0.64 +0.46 R Jup . 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.
Type of Medium:
Online Resource
ISSN:
0004-6361
,
1432-0746
DOI:
10.1051/0004-6361/202346406
Language:
English
Publisher:
EDP Sciences
Publication Date:
2023
detail.hit.zdb_id:
1458466-9
SSG:
16,12