TWO HOT JUPITERS from K2 CAMPAIGN 4

Summary, in English

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 coudé spectrograph on the McDonald Observatory 2.7 m telescope. K2-29 b (EPIC 211089792b) transits a K1V star with a period of 3.2589263 ± 0.0000015 days; its orbit is slightly eccentric (e=0.084^+0.032 _-0.051). It has a radius of R_J and a mass of M_J. Its host star exhibits significant rotational variability, and we measure a rotation period of days. K2-30 b (EPIC 210957318 b) transits a G6V star with a period of 4.098503 ± 0.000011 days. It has a radius of R_J and a mass of M_J. The star has a low metallicity for a hot Jupiter host, [Fe/H] = -0.15 ± 0.05.

• Author: Marshall C. Johnson; Davide Gandolfi; Malcolm Fridlund; Szilard Csizmadia; Michael Endl; Juan Cabrera; William D. Cochran; Hans J. Deeg; Sascha Grziwa; Ivan Ramírez; Artie P. Hatzes; Philipp Eigmüller; Oscar Barragán; Anders Erikson; Eike W. Guenther; Judith Korth; Teet Kuutma; David Nespral; Martin Pätzold; Enric Palle; Jorge Prieto-Arranz; Heike Rauer; Joonas Saario
• Publishing year: 2016-06
• Language: English
• Publication/Series: Astronomical Journal
• Volume: 151
• Issue: 6
• Links: http://dx.doi.org/10.3847/0004-6256/151/6/171
• Document type: Journal article
• Publisher: IOP Publishing
• Keywords: planets and satellites: detection; planets and satellites: individual (EPIC 211089792 b (K2-29 b), EPIC 210957318 b (K2-30 b)); stars: fundamental parameters; stars: rotation
• Status: Published
• ISBN/ISSN/Other: ISSN: 0004-6256