Details

Autor(en) / Beteiligte

• Bluhm, P.
• Pallé, E.
• Molaverdikhani, K.
• Kemmer, J.
• Hatzes, A. P.
• Kossakowski, D.
• Stock, S.
• Caballero, J. A.
• Lillo-Box, J.
• Béjar, V. J. S.
• Soto, M. G.
• Amado, P. J.
• Brown, P.
• Cadieux, C.
• Cloutier, R.
• Collins, K. A.
• Collins, K. I.
• Cortés-Contreras, M.
• Doyon, R.
• Dreizler, S.
• Espinoza, N.
• Fukui, A.
• González-Álvarez, E.
• Henning, Th
• Horne, K.
• Jeffers, S. V.
• Jenkins, J. M.
• Jensen, E. L. N.
• Kaminski, A.
• Kielkopf, J. F.
• Kusakabe, N.
• Kürster, M.
• Lafrenière, D.
• Luque, R.
• Murgas, F.
• Montes, D.
• Morales, J. C.
• Narita, N.
• Passegger, V. M.
• Quirrenbach, A.
• Schöfer, P.
• Reffert, S.
• Reiners, A.
• Ribas, I.
• Ricker, G. R.
• Seager, S.
• Schweitzer, A.
• Schwarz, R. P.
• Tamura, M.
• Trifonov, T.
• Vanderspek, R.
• Winn, J.
• Zechmeister, M.
• Zapatero Osorio, M. R.

Titel

An ultra-short-period transiting super-Earth orbiting the M3 dwarf TOI-1685

Ist Teil von

• Astronomy and astrophysics (Berlin), 2021-06, Vol.650, p.A78

Ort / Verlag

Heidelberg: EDP Sciences

Erscheinungsjahr

2021

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• Dynamical histories of planetary systems, as well as the atmospheric evolution of highly irradiated planets, can be studied by characterizing the ultra-short-period planet population, which the TESS mission is particularly well suited to discover. Here, we report on the follow-up of a transit signal detected in the TESS sector 19 photometric time series of the M3.0 V star TOI-1685 (2MASS J04342248+4302148). We confirm the planetary nature of the transit signal, which has a period of P b = 0.6691403 −0.0000021 +0.0000023 d, using precise radial velocity measurements taken with the CARMENES spectrograph. From the joint photometry and radial velocity analysis, we estimate the following parameters for TOI-1685 b: a mass of M b = 3.78 −0.63 +0.63 M ⊕ , a radius of R b = 1.70 −0.07 +0.07 R ⊕ , which together result in a bulk density of ρ b = 4.21 −0.82 +0.95 g cm −3 , and an equilibrium temperature of T eq = 1069 −16 +16 K. TOI-1685 b is the least dense ultra-short-period planet around an M dwarf known to date. TOI-1685 b is also one of the hottest transiting super-Earth planets with accurate dynamical mass measurements, which makes it a particularly attractive target for thermal emission spectroscopy. Additionally, we report with moderate evidence an additional non-transiting planet candidate in the system, TOI-1685 [c], which has an orbital period of P c = 9.02 −0.12 +0.10 d.