An Analysis of Transiting Hot Jupiters Observed with K2: WASP-55b and WASP-75b

Clark, B. J. M.; Anderson, D. R.; Hellier, C.; Turner, O. D.; Močnik, T.

Abstract

We present our analysis of the K2 short-cadence data of two previously known hot Jupiter exoplanets: WASP-55b and WASP-75b. The high precision of the K2 light curves enabled us to search for transit timing and duration variations, rotational modulation, starspots, phase-curve variations and additional transiting planets. We identified stellar variability in the WASP-75 light curve which may be an indication of rotational modulation, with an estimated period of 11.2 ± 1.5 days. We combined this with the spectroscopically measured $v\sin ({i}_{* })$ to calculate a possible line of sight projected inclination angle of ${i}_{* }=41^\circ \pm 16^\circ $. We also perform a global analysis of K2 and previously published data to refine the system parameters.

Citation

Clark, B. J. M., Anderson, D. R., Hellier, C., Turner, O. D., & Močnik, T. (2018). An Analysis of Transiting Hot Jupiters Observed with K2: WASP-55b and WASP-75b. Publications of the Astronomical Society of the Pacific, 130(985), 034401. https://doi.org/10.1088/1538-3873/aaa33e

• Journal Article Type: Article
• Acceptance Date: Dec 19, 2017
• Online Publication Date: Jan 29, 2018
• Publication Date: Mar 1, 2018
• Deposit Date: Jun 14, 2023
• Journal: Publications of the Astronomical Society of the Pacific
• Print ISSN: 0004-6280
• Electronic ISSN: 1538-3873
• Publisher: IOP Publishing
• Peer Reviewed: Peer Reviewed
• Volume: 130
• Issue: 985
• Pages: 034401
• DOI: https://doi.org/10.1088/1538-3873/aaa33e
• Keywords: Space and Planetary Science; Astronomy and Astrophysics
• Additional Information: Journal title: Publications of the Astronomical Society of the Pacific; Article type: paper; Article title: An Analysis of Transiting Hot Jupiters Observed with K2: WASP-55b and WASP-75b; Copyright information: © 2018. The Astronomical Society of the Pacific. All rights reserved.; Date received: 2017-10-28; Date accepted: 2017-12-19; Online publication date: 2018-01-29