K2-31B, A GRAZING TRANSITING HOT JUPITER ON A 1.26-DAY ORBIT AROUND A BRIGHT G7V STAR

ABSTRACT We report the discovery of K2-31b, the first confirmed transiting hot Jupiter detected by the K2 space mission. We combined K2 photometry with FastCam lucky imaging and FIES and HARPS high-resolution spectroscopy to confirm the planetary nature of the transiting object and derived the syste...

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Veröffentlicht in:	The Astronomical journal 2016-11, Vol.152 (5), p.132-132
Hauptverfasser:	Grziwa, Sascha, Gandolfi, Davide, Csizmadia, Szilard, Fridlund, Malcolm, Parviainen, Hannu, Deeg, Hans J., Cabrera, Juan, Djupvik, Amanda A., Albrecht, Simon, Palle, Enric B., Pätzold, Martin, Béjar, Victor J. S., Prieto-Arranz, Jorge, Eigmüller, Philipp, Erikson, Anders, Fynbo, Johan P. U., Guenther, Eike W., Hatzes, Artie P., Kiilerich, Amanda, Korth, Judith, Kuutma, Teet, Montañés-Rodríguez, Pilar, Nespral, David, Nowak, Grzegorz, Rauer, Heike, Saario, Joonas, Sebastian, Daniel, Slumstrup, Ditte
Format:	Artikel
Sprache:	eng
Schlagworte:	204129699 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY Constraints DETECTION Extrasolar planets Gas giant planets Grazing MASS ORBITS PHOTOMETRY PLANETS planets and satellites: detection planets and satellites: individual (EPIC planets and satellites: individual (EPIC, 204129699, b) RESOLUTION SAMPLING SATELLITES SPACE Spectroscopy STARS stars: fundamental parameters
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Zusammenfassung:	ABSTRACT We report the discovery of K2-31b, the first confirmed transiting hot Jupiter detected by the K2 space mission. We combined K2 photometry with FastCam lucky imaging and FIES and HARPS high-resolution spectroscopy to confirm the planetary nature of the transiting object and derived the system parameters. K2-31b is a 1.8-Jupiter-mass planet on a 1.26-day orbit around a G7 V star ( M , R ). The planetary radius is poorly constrained (0.7 < Rp < 1.4 RJup),15 owing to the grazing transit and the low sampling rate of the K2 photometry.16
ISSN:	0004-6256 1538-3881 1538-3881
DOI:	10.3847/0004-6256/152/5/132