Planets And Satellites: Individual: Toi-615b Planets And Satellites: Individual: Toi-622b Stars: Early-type Techniques: Photometric Techniques: Radial Velocities Planets And Satellites: Individual: Toi-2641b

External authors:

• Angelica Psaridi ( University of Geneva )
• Francois Bouchy ( University of Geneva )
• Monika Lendl ( University of Geneva )
• Babatunde Akinsanmi ( University of Geneva )
• Keivan G. Stassun ( Vanderbilt University )
• Barry Smalley ( Keele University )
• David J. Armstrong ( University of Warwick , University of Warwick )
• Saburo Howard ( Centre National de la Recherche Scientifique (CNRS) )
• Solene Ulmer-Moll ( University of Geneva , University of Bern )
• Nolan Grieves ( University of Geneva )
• Khalid Barkaoui ( Massachusetts Institute of Technology (MIT) , University of Liege , Instituto de Astrofisica de Canarias )
• Joseph E. Rodriguez ( Michigan State University )
• Edward M. Bryant ( University College London )
• Olga Suarez ( Centre National de la Recherche Scientifique (CNRS) )
• Tristan Guillot ( Centre National de la Recherche Scientifique (CNRS) )
• Phil Evans ( Sauce Observ )
• Omar Attia ( University of Geneva )
• Robert A. Wittenmyer ( University of Southern Queensland )
• Samuel W. Yee ( Princeton University )
• Karen A. Collins ( Smithsonian Institution )
• George Zhou ( University of Southern Queensland )
• Franck Galland ( Centre National de la Recherche Scientifique (CNRS) , University of Geneva )
• Lena Parc ( University of Geneva )
• Stephane Udry ( University of Geneva )
• Pedro Figueira ( University of Geneva , Universidade do Porto )
• Carl Ziegler ( Stephen F Austin State Univ )
• Christoph Mordasini ( University of Bern )
• Joshua N. Winn ( Princeton University )
• Sara Seager ( Massachusetts Institute of Technology (MIT) )
• Jon M. Jenkins ( NASA Ames Research Center )
• Joseph D. Twicken ( NASA Ames Research Center , SETI Inst )
• Rafael Brahm ( Millennium Inst Astrophys , Universidad Adolfo Ibanez , Data Observ Fdn )
• Matias Jones ( European Southern Observatory )
• Lyu Abe ( Centre National de la Recherche Scientifique (CNRS) )
• Brett T. Addison ( University of Southern Queensland , Swinburne University of Technology )
• Cesar I. Briceno ( National Optical Astronomy Observatory )
• Joshua Briegal ( University of Cambridge )
• Kevin Collins ( George Mason University )
• Tansu Daylan ( Princeton University )
• Phillip M. Eigmueller ( German Aerospace Centre (DLR) )
• Gabor Furesz ( Massachusetts Institute of Technology (MIT) )
• Natalia Guerrero ( Massachusetts Institute of Technology (MIT) , University of Florida )
• Janis Hagelberg ( University of Geneva )
• Alexis X. Heitzmann ( University of Southern Queensland )
• Rebekah Hounsell ( University of Maryland Baltimore County , NASA Goddard Space Flight Center )
• Chelsea M. Huang ( University of Southern Queensland )
• Andreas W. Krenn ( University of Geneva , Austrian Academy of Sciences )
• Nicholas Law ( University of North Carolina School of Medicine )
• Andrew Mann ( University of North Carolina School of Medicine )
• James McCormac ( University of Warwick , University of Warwick )
• Djamel D. Mekarnia ( Centre National de la Recherche Scientifique (CNRS) )
• Dany Mounzer ( University of Geneva )
• Louise R. Nielsen ( European Southern Observatory )
• Ares Osborn ( University of Warwick , University of Warwick )
• Yared A. Reinarz ( Millennium Inst Astrophys )
• Ramotholo Sefako ( South African Astronomical Observatory )
• Michal I. Steiner ( University of Geneva )
• Paul A. Strom ( University of Warwick , University of Warwick )
• Amaury H. M. J. Triaud ( University of Birmingham )
• Roland Vanderspek ( University of Geneva )
• Jose Vines ( Universidad de Chile )
• Christopher Watson ( Queens University Belfast )
• Duncan Wright ( University of Southern Queensland )
• Abner Zapata ( Pontificia Universidad Catolica de Chile )

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 (similar to 1277 F-circle dot) 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 (similar to 600 F-circle dot), 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.