TESS discovery of a super-Earth orbiting the M-dwarf star TOI-1680
Queloz, D.; Narita, N.; Winn, J. N.; Delrez, L.; Ciardi, D. R.; Collins, K. A.; Collins, K. I.; Demory, B. -O.; Gillon, M.; Hooton, M. J.; Jenkins, J. M.; Seager, S.; Twicken, J. D.; Burgasser, A. J.; Jehin, E.; Sabin, L.; Barkaoui, K.; Benkhaldoun, Z.; Latham, D. W.; Ricker, G.; Schwarz, R. P.; Vanderspek, R.; Demangeon, O.; Fukui, A.; Giacalone, S.; Stassun, K. G.; Gómez-Muñoz, M. A.; Charbonneau, D.; de Wit, J.; Triaud, A. H. M. J.; Dransfield, G.; Shporer, A.; Dressing, C. D.; Burdanov, A.; Murray, C. A.; Ducrot, E.; Gómez Maqueo Chew, Y.; Pozuelos, F. J.; Rackham, B. V.; Schanche, N.; Sebastian, D.; Timmermans, M.; Gerasimov, R.; Liu, A.; Soubkiou, A.; Ghachoui, M.; Wells, R. D.; Gan, T.; Gonzales, E. J.; Eastman, J. D.; Pedersen, P. P.; Aganze, C.; Theissen, C. A.; Garcia, L.; Hsu, C.
Belgium, Morocco, Portugal, Switzerland, United States, United Kingdom, México, Spain, France, Mexico, Japan, China
Abstract
We report the discovery by the TESS mission of a super-Earth on a 4.8-days 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⊙, mass of 0.1800 ± 0.0044 M⊙, 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 1.466−0.049+0.063 R⊕ 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).