K2-287 b: An Eccentric Warm Saturn Transiting a G-dwarf
/ Authors
A. Jord'an, R. Brahm, N. Espinoza, C. Cort'es, M. D'iaz, H. Drass, T. Henning, J. Jenkins, Mat'ias I. Jones, M. Rabus
and 16 more authors
F. Rojas, P. Sarkis, M. Vuvckovi'c, A. Zapata, M. Soto, G. Bakos, D. Bayliss, W. Bhatti, Z. Csubry, R. Lachaume, Víctor Moraga, B. Pantoja, D. Osip, Avi Shporer, V. Suc, S. V'asquez
/ Abstract
We report the discovery of K2-287b, a Saturn mass planet orbiting a G-dwarf with a period of P ≈ 15 days. First uncovered as a candidate using K2 campaign 15 data, follow-up photometry and spectroscopy were used to determine a mass , radius , period days, and eccentricity . The host star is a metal-rich V = 11.410 ± 0.129 mag G-dwarf for which we estimate a mass , radius , metallicity [Fe/H] = 0.20 ±0.05, and K. This warm eccentric planet with a time-averaged equilibrium temperature of K adds to the small sample of giant planets orbiting nearby stars whose structure is not expected to be affected by stellar irradiation. Follow-up studies on the K2-287 system could help constrain theories of planet migration in close-in orbits.
Journal: The Astronomical Journal