Exoplanet systems; 484; Astrophysics - Earth and Planetary; Astrophysics
Abstract :
[en] We present the discovery from the TESS mission of two giant planets transiting M-dwarf stars: TOI 4201 b and TOI 5344 b. We also provide precise radial velocity measurements and updated system parameters for three other M dwarfs with transiting giant planets: TOI 519, TOI 3629, and TOI 3714. We measure planetary masses of 0.525 ± 0.064 MJ, 0.243 ± 0.020 MJ, 0.689 ± 0.030 MJ, 2.57 ± 0.15 MJ, and 0.412±0.040 MJ for TOI 519 b, TOI 3629 b, TOI 3714 b, TOI 4201 b, and TOI 5344 b, respectively. The corresponding stellar masses are 0.372 ± 0.018 M☉, 0.635 ± 0.032 M☉, 0.522 ± 0.028 M☉, 0.626 ± 0.033 M☉, and 0.612 ± 0.034 M☉. All five hosts have supersolar metallicities, providing further support for recent findings that, like for solar-type stars, close-in giant planets are preferentially found around metal-rich M-dwarf host stars. Finally, we describe a procedure for accounting for systematic errors in stellar evolution models when those models are included directly in fitting a transiting planet system.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Hartman, J. D.; Princeton University, Department of Astrophysical Sciences
Bakos, G. Á.; Princeton University, Department of Astrophysical Sciences
Csubry, Z.; Princeton University, Department of Astrophysical Sciences
Howard, A. W.; California Institute of Technology, Division of Physics, Mathematics and Astronomy
Isaacson, H.; University of California, Berkeley, Department of Astronomy
Giacalone, S.; University of California, Berkeley, Department of Astronomy
Chontos, A.; Princeton University, Department of Astrophysical Sciences
Narita, N.; University of Tokyo, Japan, Center for Astrobiology, Madrid, Astrophysical Institute of the Canaries
Fukui, A.; University of Tokyo, Japan, Astrophysical Institute of the Canaries
de Leon, J. P.; University of Tokyo, Japan
Watanabe, N.; University of Tokyo, Japan
Mori, M.; University of Tokyo, Japan
Kagetani, T.; University of Tokyo, Japan
Fukuda, I.; University of Tokyo, Japan
Kawai, Y.; University of Tokyo, Japan
Ikoma, M.; National Astronomical Observatory of Japan
Palle, E.; Astrophysical Institute of the Canaries, University of La Laguna, Department of Astrophysics
Murgas, F.; Astrophysical Institute of the Canaries, University of La Laguna, Department of Astrophysics
Esparza-Borges, E.; Astrophysical Institute of the Canaries, University of La Laguna, Department of Astrophysics
Parviainen, H.; Astrophysical Institute of the Canaries, University of La Laguna, Department of Astrophysics
Bouma, L. G.; California Institute of Technology, Division of Physics, Mathematics and Astronomy
Cointepas, M.; Institute de Planetologie et d'Astrophysique de Grenoble, University of Geneva, Astronomical Observatory
Bonfils, X.; Institute de Planetologie et d'Astrophysique de Grenoble
Almenara, J. M.; University of Geneva, Astronomical Observatory
Collins, Karen A.; Harvard Smithsonian Center for Astrophysics
Collins, Kevin I.; George Mason University, Virginia
Relles, Howard M.; Harvard Smithsonian Center for Astrophysics
Barkaoui, Khalid ; Université de Liège - ULiège > Département d'astrophysique, géophysique et océanographie (AGO) > Exoplanets in Transit: Identification and Characterization
Schwarz, Richard P.; Harvard Smithsonian Center for Astrophysics
Mourad, Ghachoui; University of Liege, Belgium, University Cadi Ayyad, Morocco
