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arxiv: 2307.05368 · v2 · pith:OFWC4NYNnew · submitted 2023-07-11 · 🌌 astro-ph.EP

TESS discovery of a super-Earth orbiting the M dwarf star TOI-1680

M. Ghachoui , A. Soubkiou , R.D. Wells , B.V. Rackham , A. H.M.J. Triaud , D. Sebastian , S. Giacalone , K.G. Stassun
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D.R. Ciardi K.A. Collins A. Liu Y. G\'omez 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 M.A. G\'omez-Mu\~noz 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
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keywords planettessassumingdiscoverydwarfground-basedmassradius
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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) validated by ground-based facilities. The host star is located 37.14 pc away, with a radius of 0.2100+/-0.0064 R_sun, mass of 0.1800+/-0.0044 M_sun and an effective temperature of 3211+/-100 K. We validated and characterized the planet using TESS data, ground-based multi-wavelength photometry from TRAPPIST, SPECULOOS, and LCO, as well as high-resolution AO observations from Keck/NIRC2 and Shane. Our analyses have determined the following parameters for the planet: 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 relations, this planet is a promising target for atmospheric characterization with the James Webb Space Telescope (JWST).

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