TESS discovery of a super-Earth orbiting the M-dwarf star TOI-1680
Mourad Ghachoui, A. Soubkiou, Robert D. Wells, Benjamin V. Rackham, A. H. M. J. Triaud, Daniel Sebastian, Steven Giacalone, Keivan G. Stassun, David R. Ciardi, Karen A. Collins, A. Liu, Y. Gómez Maqueo Chew, M. Gillon, Z. Benkhaldoun, L. Delrez, Jason D. Eastman, O. D. S. Demangeon, Khalid Barkaoui, Artem Burdanov, Brice-Olivier Demory, Julien de Wit, G. Dransfield, Elsa Ducrot, L. J. Garcia, M. A. Gómez-Muñoz, M. J. Hooton, Emmanuël Jehin, C. A. Murray, P.P. Pedersen, F. J. Pozuelos, D. Queloz, L. Sabin, N. Schanche, M. Timmermans, Erica J. Gonzales, Courtney D. Dressing, Christian Aganze, Adam J. Burgasser, Roman Gerasimov, Chih-Chun Hsu, Christopher A. Theissen, D. Charbonneau, J. M. Jenkins, David W. Latham, G. Ricker, S. Seager, Avi Shporer, Joseph D. Twicken, R. Vanderspek, Joshua N. Winn, K. I. Collins, Akihiko Fukui, Tianjun Gan, Norio Narita, Richard P. Schwarz
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).