A transiting giant planet in orbit around a 0.2-solar-mass host star

Bibcode
2025NatAs...9.1031B
DOI
10.1038/s41550-025-02552-4
Bryant, Edward M.; Jordán, Andrés; Hartman, Joel D.; Bayliss, Daniel; Sedaghati, Elyar; Barkaoui, Khalid; Chouqar, Jamila; Pozuelos, Francisco J.; Thorngren, Daniel P.; Timmermans, Mathilde; Almenara, Jose Manuel; Chilingarian, Igor V.; Collins, Karen A.; Gan, Tianjun; Howell, Steve B.; Narita, Norio; Palle, Enric; Rackham, Benjamin V.; Triaud, Amaury H. M. J.; Bakos, Gaspar Á.; Brahm, Rafael; Hobson, Melissa J.; Van Eylen, Vincent; Amado, Pedro J.; Arnold, Luc; Bonfils, Xavier; Burdanov, Artem; Cadieux, Charles; Caldwell, Douglas A.; Casanova, Victor; Charbonneau, David; Clark, Catherine A.; Collins, Kevin I.; Daylan, Tansu; Dransfield, Georgina; Demory, Brice-Olivier; Ducrot, Elsa; Fernández-Rodríguez, Gareb; Fukuda, Izuru; Fukui, Akihiko; Gillon, Michaël; Gore, Rebecca; Hooton, Matthew J.; Ikuta, Kai; Jehin, Emmanuel; Jenkins, Jon M.; Levine, Alan M.; Littlefield, Colin; Murgas, Felipe; Nguyen, Kendra; Parviainen, Hannu; Queloz, Didier; Seager, S.; Sebastian, Daniel; Srdoc, Gregor; Vanderspek, R.; Winn, Joshua N.; de Wit, Julien; Zúñiga-Fernández, Sebastián
Referencia bibliográfica

Nature Astronomy

Fecha de publicación:
7
2025
Número de autores
59
Número de autores del IAC
7
Número de citas
5
Número de citas referidas
1
Descripción
Planet formation models indicate that the formation of giant planets is substantially harder around low-mass stars due to the scaling of protoplanetary disc masses with stellar mass. The discovery of giant planets orbiting such low-mass stars thus imposes strong constraints on giant planet formation processes. Here we report the discovery of a transiting giant planet orbiting a 0.207 ± 0.011 M⊙ star. The planet, TOI-6894 b, has a mass and radius of MP = 0.168 ± 0.022 MJ (53.4 ± 7.1 M⊕) and RP = 0.855 ± 0.022 RJ and probably includes 12 ± 2 M⊕ of metals. The discovery of TOI-6894 b highlights the need for a better understanding of giant planet formation mechanisms and the protoplanetary disc environments in which they occur. The extremely deep transits (17% depth) make TOI-6894 b one of the most accessible exoplanetary giants for atmospheric characterization observations, which will be key for fully interpreting the formation history of this notable system and for the study of atmospheric methane chemistry.
Proyectos relacionados
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Exoplanetas y Astrobiología
La búsqueda de vida en el Universo se ha visto impulsada por los recientes descubrimientos de planetas alrededor de otras estrellas (los llamados exoplanetas), convirtiéndose en uno de los campos más activos dentro de la Astrofísica moderna. En los últimos años los descubrimientos cada vez más numerosos de nuevos exoplanetas y los últimos avances
Enric
Pallé Bago
En ejecución
Tipo
Con árbitro
Sistema Solar y Sistemas Planetarios (SEYSS)

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