Details

Autor(en) / Beteiligte

• Kossakowski, D.
• Kemmer, J.
• Bluhm, P.
• Stock, S.
• Caballero, J. A.
• Béjar, V. J. S.
• Guillén, C. Cardona
• Lodieu, N.
• Collins, K. A.
• Oshagh, M.
• Schlecker, M.
• Espinoza, N.
• Pallé, E.
• Henning, Th
• Kreidberg, L.
• Kürster, M.
• Amado, P. J.
• Anderson, D. R.
• Morales, J. C.
• Cartwright, S.
• Charbonneau, D.
• Chaturvedi, P.
• Cifuentes, C.
• Conti, D. M.
• Cortés-Contreras, M.
• Dreizler, S.
• Galadí-Enríquez, D.
• Guerra, P.
• Hart, R.
• Hellier, C.
• Henze, C.
• Herrero, E.
• Jeffers, S. V.
• Jenkins, J. M.
• Jensen, E. L. N.
• Kaminski, A.
• Kielkopf, J. F.
• Kunimoto, M.
• Lafarga, M.
• Latham, D. W.
• Lillo-Box, J.
• Luque, R.
• Molaverdikhani, K.
• Montes, D.
• Morello, G.
• Morgan, E. H.
• Nowak, G.
• Pavlov, A.
• Perger, M.
• Quintana, E. V.
• Quirrenbach, A.
• Reffert, S.
• Reiners, A.
• Ricker, G.
• Ribas, I.
• López, C. Rodríguez
• Osorio, M. R. Zapatero
• Seager, S.
• Schöfer, P.
• Schweitzer, A.
• Trifonov, T.
• Vanaverbeke, S.
• Vanderspek, R.
• West, R.
• Winn, J.
• Zechmeister, M.

Titel

TOI-1201 b: A mini-Neptune transiting a bright and moderately young M dwarf

Ist Teil von

• Astronomy and astrophysics (Berlin), 2021-12, Vol.656, p.A124

Ort / Verlag

Heidelberg: EDP Sciences

Erscheinungsjahr

2021

Link zum Volltext

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• We present the discovery of a transiting mini-Neptune around TOI-1201, a relatively bright and moderately young early M dwarf ( J ≈ 9.5 mag, ~600–800 Myr) in an equal-mass ~8 arcsecond-wide binary system, using data from the Transiting Exoplanet Survey Satellite, along with follow-up transit observations. With an orbital period of 2.49 d, TOI-1201 b is a warm mini-Neptune with a radius of R b = 2.415 ± 0.090 R ⊕ . This signal is also present in the precise radial velocity measurements from CARMENES, confirming the existence of the planet and providing a planetary mass of M b = 6.28 ± 0.88 M ⊕ and, thus, an estimated bulk density of 2.45 −0.42 +0.48 g cm −3 . The spectroscopic observations additionally show evidence of a signal with a period of 19 d and a long periodic variation of undetermined origin. In combination with ground-based photometric monitoring from WASP-South and ASAS-SN, we attribute the 19 d signal to the stellar rotation period ( P rot = 19–23 d), although we cannot rule out that the variation seen in photometry belongs to the visually close binary companion. We calculate precise stellar parameters for both TOI-1201 and its companion. The transiting planet is anexcellent target for atmosphere characterization (the transmission spectroscopy metric is 97 −16 +21 ) with the upcoming James Webb Space Telescope. It is also feasible to measure its spin-orbit alignment via the Rossiter-McLaughlin effect using current state-of-the-art spectrographs with submeter per second radial velocity precision.