TY - JOUR
T1 - WASP-80b: a gas giant transiting a cool dwarf
AU - Triaud, A.~H.~M.~J.
AU - Anderson, D.~R.
AU - Collier Cameron, A.
AU - Doyle, A.~P.
AU - Fumel, A.
AU - Gillon, M.
AU - Hellier, C.
AU - Jehin, E.
AU - Lendl, M.
AU - Lovis, C.
AU - Maxted, P.~F.~L.
AU - Pepe, F.
AU - Pollacco, D.
AU - Queloz, D.
AU - Ségransan, D.
AU - Smalley, B.
AU - Smith, A.~M.~S.
AU - Udry, S.
AU - West, R.~G.
AU - Wheatley, P.~J.
PY - 2013/3/1
Y1 - 2013/3/1
N2 - We report the discovery of a planet transiting the star WASP-80 (1SWASP J201240.26-020838.2; 2MASS J20124017-0208391; TYC 5165-481-1; BPM 80815; V = 11.9, K = 8.4). Our analysis shows this is a 0.55 plusmn 0.04 M$_jup$, 0.95 plusmn 0.03 R$_jup$ gas giant on a circular 3.07 day orbit around a star with a spectral type between K7V and M0V. This system produces one of the largest transit depths so far reported, making it a worthwhile target for transmission spectroscopy. We find a large discrepancy between the vsini$_⋆$ inferred from stellar line broadening and the observed amplitude of the Rossiter-McLaughlin effect. This can be understood either by an orbital plane nearly perpendicular to the stellar spin or by an additional, unaccounted for source of broadening. Using WASP-South photometric observations, from Sutherland (South Africa), confirmed with the 60 cm TRAPPIST robotic telescope, EulerCam, and the CORALIE spectrograph on the Swiss 1.2 m Euler Telescope, and HARPS on the ESO 3.6 m (Prog ID 089.C-0151), all three located at La Silla Observatory, Chile.Radial velocity and photometric data are available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr(130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/551/A80
AB - We report the discovery of a planet transiting the star WASP-80 (1SWASP J201240.26-020838.2; 2MASS J20124017-0208391; TYC 5165-481-1; BPM 80815; V = 11.9, K = 8.4). Our analysis shows this is a 0.55 plusmn 0.04 M$_jup$, 0.95 plusmn 0.03 R$_jup$ gas giant on a circular 3.07 day orbit around a star with a spectral type between K7V and M0V. This system produces one of the largest transit depths so far reported, making it a worthwhile target for transmission spectroscopy. We find a large discrepancy between the vsini$_⋆$ inferred from stellar line broadening and the observed amplitude of the Rossiter-McLaughlin effect. This can be understood either by an orbital plane nearly perpendicular to the stellar spin or by an additional, unaccounted for source of broadening. Using WASP-South photometric observations, from Sutherland (South Africa), confirmed with the 60 cm TRAPPIST robotic telescope, EulerCam, and the CORALIE spectrograph on the Swiss 1.2 m Euler Telescope, and HARPS on the ESO 3.6 m (Prog ID 089.C-0151), all three located at La Silla Observatory, Chile.Radial velocity and photometric data are available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr(130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/551/A80
KW - planetary systems, binaries: eclipsing, stars: individual: WASP-80, techniques: radial velocities, techniques: photometric, techniques: spectroscopic
U2 - 10.1051/0004-6361/201220900
DO - 10.1051/0004-6361/201220900
M3 - Article
SN - 0004-6361
VL - 551
SP - A80
JO - Astronomy and Astrophysics
JF - Astronomy and Astrophysics
ER -