EPIC 211089792b & EPIC 210957318b: two hot Jupiters From the K2 Mission Confirmed

Confirmation of Two Hot Jupiters from K2 Campaign 4

Authors:

Johnson et al

Abstract:

We confirm the planetary nature of two transiting hot Jupiters discovered by the Kepler spacecraft's K2 extended mission in its Campaign 4, using precise radial velocity measurements from FIES@NOT, HARPS-N@TNG, and the coud\'e spectrograph on the McDonald Observatory 2.7 m telescope. EPIC 211089792 b transits a K1V star with a period of 3.2589263±0.0000015 days; its orbit is slightly eccentric (e=0.086+0.035−0.025). It has a radius of RP=0.998+0.072−0.066 RJ and a mass of MP=0.613+0.028−0.027 MJ. Its host star exhibits significant rotational variability, and we measure a rotation period of Prot=10.777±0.031 days. EPIC 210957318 b transits a G6V star with a period of 4.098503±0.000011 days. It has a radius of RP=1.039+0.050−0.051 RJ and a mass of MP=0.579+0.028−0.027 MJ. The star has a low metallicity for a hot Jupiter host, [Fe/H]=−0.15±0.05.