A hot sub-Neptune in the desert and a temperate super-Earth around faint M dwarfs. Color validation of TOI-4479b and TOI-2081b

Bibcode
2022A&A...666A..10E
DOI
10.1051/0004-6361/202243731
Esparza-Borges, E.; Parviainen, H.; Murgas, F.; Pallé, E.; Maas, A.; Morello, G.; Zapatero-Osorio, M. R.; Barkaoui, K.; Narita, N.; Fukui, A.; Casasayas-Barris, N.; Oshagh, M.; Crouzet, N.; Galán, D.; Fernández, G. E.; Kagetani, T.; Kawauchi, K.; Kodama, T.; Korth, J.; Kusakabe, N.; Laza-Ramos, A.; Luque, R.; Livingston, J.; Madrigal-Aguado, A.; Mori, M.; Orell-Miquel, J.; Puig-Subirà, M.; Stangret, M.; Terada, Y.; Watanabe, N.; Zou, Y.; Baliga Savel, A.; Belinski, A. A.; Collins, K.; Dressing, C. D.; Giacalone, S.; Gill, H.; Goliguzova, M. V.; Ikoma, M.; Jenkins, J. M.; Tamura, M.; Twicken, J. D.; Ricker, G. R.; Schwarz, R. P.; Seager, S.; Shporer, A.; Vanderspek, R.; Winn, J.
Referencia bibliográfica

Astronomy and Astrophysics

Fecha de publicación:
10
2022
Revista
Astronomy and Astrophysics
Número de autores
48
Número de autores del IAC
16
Número de citas
10
Número de citas referidas
9
Descripción

Aims: We report the discovery and validation of two TESS exoplanets orbiting faint M dwarfs: TOI-4479b and TOI-2081b.
Methods: We jointly analyzed space (TESS mission) and ground-based (MuSCAT2, MuSCAT3 and SINISTRO instruments) light curves using our multicolor photometry transit analysis pipeline. This allowed us to compute contamination limits for both candidates and validate them as planet-sized companions.
Results: We found TOI-4479b to be a sub-Neptune-sized planet (Rp = 2.82−0.63+0.65 R⊕) and TOI-2081b to be a super-Earth-sized planet (Rp = 2.04−0.54+0.50 R⊕). Furthermore, we obtained that TOI-4479b, with a short orbital period of 1.15890−0.00001+0.00002 days, lies within the Neptune desert and is in fact the largest nearly ultra-short period planet around an M dwarf known to date.
Conclusions: These results make TOI-4479b rare among the currently known exoplanet population of M dwarf stars and an especially interesting target for spectroscopic follow-up and future studies of planet formation and evolution.
Proyectos relacionados
Image withthe projects' name
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)
Métodos
Técnicas

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