TESS Discovers A Super-Earth Orbiting The M Dwarf Star TOI-1680

We report the discovery by the TESS mission of a super-Earth on a 4.8-d orbit around an inactive M4.5 dwarf (TOI-1680) and its validation with ground-based facilities.

The host star is located 37.14 pc away, and it has a radius of 0.2100+/-0.0064 R_sun, a mass of 0.1800+/-0.0044 M_sun and an effective temperature of 3211+/-100 K. We validate and characterize the planet using TESS data, ground-based multi-wavelength photometry from TRAPPIST, SPECULOOS and LCO, and high-resolution AO observations from Keck/NIRC2 and Shane.

Our analyses determine the planet to have a radius of 1.466+0.063/-0.049 R_earth and an equilibrium temperature of 404+/-14 K, assuming no albedo and perfect heat redistribution. Assuming a mass based on mass-radius relationships, this planet is a promising target for atmospheric characterization with the James Webb Space Telescope (JWST).

M. Ghachoui, A. Soubkiou, R.D. Wells, B.V. Rackham, A. H.M.J. Triaud, D. Sebastian, S. Giacalone, K.G. Stassun, D.R. Ciardi, K.A. Collins, A. Liu, Y. Gómez Maqueo Chew, M. Gillon, Z. Benkhaldoun, L. Delrez, J.D. Eastman, O. Demangeon, K. Barkaoui, A. Burdanov, B.-O. Demory, J. de Wit, G. Dransfield, E. Ducrot, L. Garcia, Y. Gómez Maqueo Chew, M.A. Gómez-Muñoz, M.J. Hooton, E. Jehin, C.A. Murray, P.P. Pedersen, F.J. Pozuelos, D. Queloz, L. Sabin, N. Schanche, M. Timmermans, E.J. Gonzales, C.D. Dressing, C. Aganze, A.J. Burgasser, R. Gerasimov, C. Hsu, C.A. Theissen, D. Charbonneau, J.M. Jenkins, D.W. Latham, G. Ricker, S. Seager, A. Shporer, J.D. Twicken, R. Vanderspek, J.N. Winn, K.I. Collins, A. Fukui, T. Gan, N. Narita, R.P. Schwarz

Comments: Accepted in A&A
Subjects: Earth and Planetary Astrophysics (astro-ph.EP)
Cite as: arXiv:2307.05368 [astro-ph.EP] (or arXiv:2307.05368v1 [astro-ph.EP] for this version)
Submission history
From: Mourad Ghachoui
[v1] Tue, 11 Jul 2023 15:47:34 UTC (7,868 KB)
https://arxiv.org/abs/2307.05368
Astrobiology