TY - JOUR
T1 - HATS-2b
T2 - A transiting extrasolar planet orbiting a K -type star showing starspot activity a
AU - Mohler-Fischer, M.
AU - Mancini, L.
AU - Hartman, J. D.
AU - Bakos, G. A.
AU - Penev, K.
AU - Bayliss, D.
AU - Jordán, A.
AU - Csubry, Z.
AU - Zhou, G.
AU - Rabus, M.
AU - Nikolov, N.
AU - Brahm, R.
AU - Espinoza, N.
AU - Buchhave, L. A.
AU - Béky, B.
AU - Suc, V.
AU - Csák, B.
AU - Henning, T.
AU - Wright, D. J.
AU - Tinney, C. G.
AU - Addison, B. C.
AU - Schmidt, B.
AU - Noyes, R. W.
AU - Papp, I.
AU - Lázár, J.
AU - Sári, P.
AU - Conroy, P.
PY - 2013
Y1 - 2013
N2 - We report the discovery of HATS-2b, the second transiting extrasolar planet detected by the HATSouth survey. HATS-2b is moving on a circular orbit around a V = 13.6 mag, K-type dwarf star (GSC 6665-00236), at a separation of 0.0230 ± 0.0003 AU and with a period of 1.3541 days. The planetary parameters have been robustly determined using a simultaneous fit of the HATSouth, MPG/ESO 2.2 m/GROND, Faulkes Telescope South/Spectral transit photometry, and MPG/ESO 2.2 m/FEROS, Euler 1.2 m/CORALIE, AAT 3.9 m/CYCLOPS radial-velocity measurements. HATS-2b has a mass of 1.37 ± 0.16 MJ, a radius of 1.14 ± 0.03 RJ, and an equilibrium temperature of 1567 ± 30 K. The host star has a mass of 0.88 ± 0.04 M ⊙ and a radius of 0.89 ± 0.02 R ⊙, and it shows starspot activity. We characterized the stellar activity by analyzing two photometric follow-up transit light curves taken with the GROND instrument, both obtained simultaneously in four optical bands (covering the wavelength range of 3860-9520 Å). The two light curves contain anomalies compatible with starspots on the photosphere of the host star along the same transit chord.
AB - We report the discovery of HATS-2b, the second transiting extrasolar planet detected by the HATSouth survey. HATS-2b is moving on a circular orbit around a V = 13.6 mag, K-type dwarf star (GSC 6665-00236), at a separation of 0.0230 ± 0.0003 AU and with a period of 1.3541 days. The planetary parameters have been robustly determined using a simultaneous fit of the HATSouth, MPG/ESO 2.2 m/GROND, Faulkes Telescope South/Spectral transit photometry, and MPG/ESO 2.2 m/FEROS, Euler 1.2 m/CORALIE, AAT 3.9 m/CYCLOPS radial-velocity measurements. HATS-2b has a mass of 1.37 ± 0.16 MJ, a radius of 1.14 ± 0.03 RJ, and an equilibrium temperature of 1567 ± 30 K. The host star has a mass of 0.88 ± 0.04 M ⊙ and a radius of 0.89 ± 0.02 R ⊙, and it shows starspot activity. We characterized the stellar activity by analyzing two photometric follow-up transit light curves taken with the GROND instrument, both obtained simultaneously in four optical bands (covering the wavelength range of 3860-9520 Å). The two light curves contain anomalies compatible with starspots on the photosphere of the host star along the same transit chord.
KW - Planetary systems
KW - Stars: fundamental parameters
KW - Stars: individual: GSC 6665-00236
KW - Stars: individual: HATS-2
KW - Techniques: photometric
KW - Techniques: spectroscopic
UR - http://www.scopus.com/inward/record.url?scp=84885089744&partnerID=8YFLogxK
U2 - 10.1051/0004-6361/201321663
DO - 10.1051/0004-6361/201321663
M3 - Article
SN - 0004-6361
VL - 558
JO - Astronomy and Astrophysics
JF - Astronomy and Astrophysics
M1 - A55
ER -