HATS-2b: A transiting extrasolar planet orbiting a K-type star showing starspot activity
Article
Article Title | HATS-2b: A transiting extrasolar planet orbiting a K-type star showing starspot activity |
---|---|
ERA Journal ID | 1050 |
Article Category | Article |
Authors | Mohler-Fischer, M. (Author), Mancini, L. (Author), Hartman, J. D. (Author), Bakos, G. A. (Author), Penev, K. (Author), Bayliss, D. (Author), Jordan, A. (Author), Csubry, Z. (Author), Zhou, G. (Author), Rabus, M. (Author), Nikolov, N. (Author), Brahm, R. (Author), Espinoza, N. (Author), Buchhave, L. A. (Author), Beky, B. (Author), Suc, V. (Author), Csak, B. (Author), Henning, T. (Author), Wright, D. J. (Author), Tinney, C. G. (Author), Addison, B. C. (Author), Schmidt, B. (Author), Noyes, R. W. (Author), Papp, I. (Author), Lazar, J. (Author), Sari, P. (Author) and Conroy, P. (Author) |
Journal Title | Astronomy and Astrophysics: a European journal |
Journal Citation | 558, pp. 1-13 |
Article Number | A55 |
Number of Pages | 13 |
Year | 2013 |
Publisher | EDP Sciences |
Place of Publication | France |
ISSN | 0004-6361 |
1432-0746 | |
Digital Object Identifier (DOI) | https://doi.org/10.1051/0004-6361/201321663 |
Web Address (URL) | https://www.aanda.org/articles/aa/full_html/2013/10/aa21663-13/aa21663-13.html |
Abstract | 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. |
Keywords | planetary systems; techniques: spectroscopic; stars: fundamental; parameters; techniques: photometric; stars: individual:; HATS-2; stars:; individual: GSC 6665-00236; Astrophysics - Earth and Planetary; Astrophysics |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
Public Notes | File reproduced in accordance with the copyright policy of the publisher/author. |
Institution of Origin | University of Southern Queensland |
Byline Affiliations | Max Planck Society, Germany |
Princeton University, United States | |
Australian National University | |
Pontifical Catholic University of Chile, Chile | |
University of Exeter, United Kingdom | |
University of Copenhagen, Denmark | |
Center for Astrophysics Harvard and Smithsonian, United States | |
University of New South Wales | |
Centre for Astrophysics (Research) | |
Hungarian Astronomical Association, Hungary |
https://research.usq.edu.au/item/q6x55/hats-2b-a-transiting-extrasolar-planet-orbiting-a-k-type-star-showing-starspot-activity
Download files
88
total views54
total downloads1
views this month1
downloads this month