Details

Autor(en) / Beteiligte

• 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
• A. Baliga Savel
• 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

Titel

A hot sub-Neptune in the desert and a temperate super-Earth around faint M dwarfs

Ist Teil von

• Astronomy and astrophysics (Berlin), 2022-10, Vol.666

Ort / Verlag

Heidelberg: EDP Sciences

Erscheinungsjahr

2022

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• 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.