The Library
WASP-117b : a 10-day-period Saturn in an eccentric and misaligned orbit
Tools
(2014) WASP-117b : a 10-day-period Saturn in an eccentric and misaligned orbit. Astronomy & Astrophysics, Volume 568 . Article number A81 . doi:10.1051/0004-6361/201424481 ISSN 0004-6361.
Research output not available from this repository.
Request-a-Copy directly from author or use local Library Get it For Me service.
Official URL: http://dx.doi.org/10.1051/0004-6361/201424481
Abstract
We report the discovery of WASP-117b, the first planet with a period beyond 10 days found by the WASP survey. The planet has a mass of Mp = 0.2755 ± 0.0089 MJ, a radius of and is in an eccentric (e = 0.302 ± 0.023), 10.02165 ± 0.00055 d orbit around a main-sequence F9 star. The host star’s brightness (V = 10.15 mag) makes WASP-117 a good target for follow-up observations, and with a periastron planetary equilibrium temperature of K and a low planetary mean density () it is one of the best targets for transmission spectroscopy among planets with periods around 10 days. From a measurement of the Rossiter-McLaughlin effect, we infer a projected angle between the planetary orbit and stellar spin axes of β = −44 ± 11 deg, and we further derive an orbital obliquity of deg. Owing to the large orbital separation, tidal forces causing orbital circularization and realignment of the planetary orbit with the stellar plane are weak, having had little impact on the planetary orbit over the system lifetime. WASP-117b joins a small sample of transiting giant planets with well characterized orbits at periods above ~8 days.
Item Type: | Journal Article | ||||||||
---|---|---|---|---|---|---|---|---|---|
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||
Journal or Publication Title: | Astronomy & Astrophysics | ||||||||
Publisher: | EDP Sciences | ||||||||
ISSN: | 0004-6361 | ||||||||
Official Date: | August 2014 | ||||||||
Dates: |
|
||||||||
Volume: | Volume 568 | ||||||||
Article Number: | Article number A81 | ||||||||
DOI: | 10.1051/0004-6361/201424481 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published |
Request changes or add full text files to a record
Repository staff actions (login required)
View Item |