TOI 4201 b and TOI 5344 b: Discovery of Two Transiting Giant Planets around M-dwarf Stars and Revised Parameters for Three Others

Hartman, J. D.; Bakos, G. Á.; Csubry, Z.; Howard, A. W.; Isaacson, H.; Giacalone, S.; Chontos, A.; Narita, N.; Fukui, A.; de Leon, J. P.; Watanabe, N.; Mori, M.; Kagetani, T.; Fukuda, I.; Kawai, Y.; Ikoma, M.; Palle, E.; Murgas, F.; Esparza-Borges, E.; Parviainen, H.; Bouma, L. G.; Cointepas, M.; Bonfils, X.; Almenara, J. M.; Collins, Karen A.; Collins, Kevin I.; Relles, Howard M.; Barkaoui, Khalid; Schwarz, Richard P.; Mourad, Ghachoui; Timmermans, Mathilde; Dransfield, Georgina; Burdanov, Artem; de Wit, Julien; Jehin, Emmanuël; Triaud, Amaury H. M. J.; Gillon, Michaël; Benkhaldoun, Zouhair; Horne, Keith; Sefako, Ramotholo; Jordán, A.; Brahm, R.; Suc, V.; Howell, Steve B.; Furlan, E.; Schlieder, J. E.; Ciardi, D.; Barclay, T.; Gonzales, E. J.; Crossfield, I.; Dressing, C. D.; Goliguzova, M.; Tatarnikov, A.; Ricker, George R.; Vanderspek, Roland; Latham, David W.; Seager, S.; Winn, Joshua N.; Jenkins, Jon M.; Striegel, Stephanie; Shporer, Avi; Vanderburg, Andrew; Levine, Alan M.; Kostov, Veselin B.; Watanabe, David
Bibliographical reference

The Astronomical Journal

Advertised on:
Number of authors
IAC number of authors
Refereed citations
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 M J, 0.243 ± 0.020 M J, 0.689 ± 0.030 M J, 2.57 ± 0.15 M J, and 0.412±0.040 M J 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.
Related projects
Projects' name image
Exoplanets and Astrobiology
The search for life in the universe has been driven by recent discoveries of planets around other stars (known as exoplanets), becoming one of the most active fields in modern astrophysics. The growing number of new exoplanets discovered in recent years and the recent advance on the study of their atmospheres are not only providing new valuable
Pallé Bago