K2-295 b and K2-237 b: Two Transiting Hot Jupiters
Kuzuhara, M.; Alonso, R.; Deeg, H.; Erikson, A.; Fridlund, M.; Pätzold, M.; Rauer, H.; Ribas, I.; Guenther, E. W.; Barragán, O.; Dai, F.; Gandolfi, D.; Hirano, T.; Korth, J.; Prieto-Arranz, J.; Nespral, D.; Grziwa, S.; Albrecht, S.; Hatzes, A. P.; Csizmadia, Sz.; Smith, A. M. S.; Cabrera, J.; Narita, N.; Cochran, W. D.; Eigmüller, Ph.; Palle, E.; Persson, C. M.; Van Eylen, V.; Nowak, G.; Redfield, S.; Fukui, A.; Hidalgo, D.; Endl, M.; Livingston, J.; Niraula, P.
Germany, Italy, Denmark, Spain, United States, Netherlands, Sweden, Japan
Abstract
We report the discovery from K2 of two transiting hot Jupiter systems. K2-295 (observed in Campaign 8) is a K5 dwarf which hosts a planet slightly smaller than Jupiter, orbiting with a period of 4.0 d. We have made an independent discovery of K2-237 b (Campaign 11), which orbits an F9 dwarf every 2.2 d and has an inflated radius 60-70% larger than that of Jupiter. We use high-precision radial velocity measurements, obtained using the HARPS and FIES spectrographs, to measure the planetary masses. We find that K2-295 b has a similar mass to Saturn, while K2-237 b is a little more massive than Jupiter.