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.
N1 - Funding Information:
Development of the HATSouth project was funded by NSF MRI grant NSF/AST-0723074, operations are supported by NASA grant NNX09AB29G, and follow-up observations receive partial support from grant NSF/AST-1108686. Data presented in this paper is based partly on observations obtained with the HATSouth Station at the Las Campanas Observatory of the Carnegie Institution of Washington. This work is based on observations collected at the MPG/ESO 2.2 m Telescope located at the ESO Observatory in La Silla (Chile), under program IDs P087.A-9014(A), P088.A-9008(A), P089.A-9008(A), 089.A-9006(A), and Chilean time P087.C-0508(A). Operations of this telescope are jointly performed by the Max Planck Gesellschaft and the European Southern Observatory. GROND has been built by the high-energy group of MPE in collaboration with the LSW Tautenburg and ESO, and is operating as a PI-instrument at the MPG/ESO 2.2 m telescope. We thank Timo Anguita and Régis Lachaume for their technical assistance during the observations at the MPG/ESO 2.2 m Telescope. A.J. acknowledges support from Fondecyt project 1130857, Anillo ACT-086, BASAL CATA PFB-06 and the Millenium Science Initiative, Chilean Ministry of Economy (Nucleus P10-022-F). V.S. acknowledges support form BASAL CATA PFB-06. R.B. and N.E. acknowledge support from Fondecyt project 1095213. N.N. acknowledges support from an STFC consolidated grant. M.R. acknowledges support from a FONDECYT postdoctoral fellowship N°3120097. L.M. thanks Jeremy Tregloan-Reed for his help for using of the PRISM and GEMC codes, and John Southworth and Valerio Bozza for useful discussions. This paper also uses observations obtained with facilities of the Las Cumbres Observatory Global Telescope. Work at the Australian National University is supported by ARC Laureate Fellowship Grant FL0992131. We acknowledge the use of the AAVSO Photometric All-Sky Survey (APASS), funded by the Robert Martin Ayers Sciences Fund, and the SIMBAD database, operated at the CDS, Strasbourg, France. Work at UNSW has been supported by ARC Australian Professorial Fellowship grant DP0774000, ARC LIEF grant LE0989347 and ARC Super Science Fellowships FS100100046.
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
AN - SCOPUS:84885089744
SN - 0004-6361
VL - 558
JO - Astronomy and Astrophysics
JF - Astronomy and Astrophysics
M1 - A55
ER -