학술논문
Three Saturn-mass planets transiting F-type stars revealed with TESS and HARPS
Document Type
Working Paper
Author
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.; Zhou, George; Galland, Franck; Parc, Léna; Udry, Stéphane; Figueira, Pedro; Ziegler, Carl; Mordasini, Christoph; Winn, Joshua N.; Seager, Sara; Jenkins, Jon M.; Twicken, Joseph D.; Brahm, Rafael; Jones, Matías I.; Abe, Lyu; Addison, Brett; Briceño, César; Briegal, Joshua T.; Collins, Kevin I.; Daylan, Tansu; Eigmüller, Phillip; Furesz, Gabor; Guerrero, Natalia M.; Hagelberg, Janis; Heitzmann, Alexis; Hounsell, Rebekah; Huang, Chelsea X.; Krenn, Andreas; Law, Nicholas M.; Mann, Andrew W.; McCormac, James; Mékarnia, Djamel; Mounzer, Dany; Nielsen, Louise D.; Osborn, Ares; Reinarz, Yared; Sefako, Ramotholo R.; Steiner, Michal; Strøm, Paul A.; Triaud, Amaury H. M. J.; Vanderspek, Roland; Vanzi, Leonardo; Vines, Jose I.; Watson, Christopher A.; Wright, Duncan J.; Zapata, Abner
Source
A&A 675, A39 (2023)
Subject
Language
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 ($\sim$1277 $F_{\oplus}$) and bloated Saturn-mass planet (1.69$^{+0.05}_{-0.06}$$R_{Jup}$ and 0.43$^{+0.09}_{-0.08}$$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}$$R_{Jup}$ and a mass of 0.30$^{+0.07}_{-0.08}$~$M_{Jup}$ in a 6.40 day orbit. Despite its high insolation flux ($\sim$600 $F_{\oplus}$), TOI-622b does not show any evidence of radius inflation. TOI-2641b is a 0.39$^{+0.02}_{-0.04}$$M_{Jup}$ 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}$$R_{Jup}$. Additionally, TOI-615b is considered attractive for atmospheric studies via transmission spectroscopy with ground-based spectrographs and $\textit{JWST}$. 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.
Comment: 16 pages, 17 figures, submitted to A&A
Comment: 16 pages, 17 figures, submitted to A&A