M. Ghachoui, A. Soubkiou, R. D. Wells, B. V. Rackham, A. H. M. J. Triaud, D. Sebastian, S. Giacalone, K. G. Stassun, D. Ciardi, K. A. Collins, A. Liu, Y. Gómez Maqueo Chew, M. Gillon, Z. Benkhaldoun, L. Delrez, J. D. Eastman, O. D. S. Demangeon, K. Barkaoui, A. Burdanov, B.-O. Demory, J. De Wit, G. Dransfield, E. Ducrot, L. J. Garcia, M. A. Gömez-Munoz, 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. R. Ricker, S. Seager, A. Shporer, J. D. Twicken, R. K. Vanderspek, J. N. Winn, K. I. Collins, A. Fukui, T. Gan, N. Narita, R. 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).
Notes
★ B. V. Rackham - 51 Pegasi b Fellow.
★★ E. Ducrot - Paris Region Fellow, Marie Sklodowska-Curie Action.
Astronomy & Astrophysics
Volume 677, Article Number A38, Number of pages 20
2023 September
