SOAP-T: A tool to study the light-curve and radial velocity of a system with a transiting planet and a rotating spotted star

Abstract

We present an improved version of SOAP (Boisse et al. 2012) named "SOAP-T", which can generate the radial velocity variations and light-curves for systems consisting of a rotating spotted star with a transiting planet. This tool can be used to study the anomalies inside transit light-curves and the Rossiter-McLaughlin effect, to better constrain the orbital configuration and properties of planetary systems and active zones of their host stars. Tests of the code are presented to illustrate its performance and to validate its capability when compared with analytical models and real data. Finally, we apply SOAP-T to the active star, HAT-P-11, observed by the NASA Kepler space telescope and use this system to discuss the capability of this tool in analyzing light-curves for the cases where the transiting planet overlaps with the star's spots.

9 pages, 7 figures, accepted for publication in Astronomy and Astrophysics

References in corpus (9)

• The HARPS search for southern extra-solar planets. X. A m sin i = 11 Mearth planet around the nearby spotted M dwarf GJ 674
• TW Hydrae: evidence of stellar spots instead of a Hot Jupiter
• Stellar activity of planetary host star HD 189733
• Alignment of the stellar spin with the orbits of a three-planet system
• Misaligned spin-orbit in the XO-3 planetary system?
• SOAP. A tool for the fast computation of photometry and radial velocity induced by stellar spots
• Measurements of Stellar Inclinations for Kepler Planet Candidates
• Updated parameters for the transiting exoplanet WASP-3b using RISE, a new fast camera for the Liverpool Telescope
• A cool starspot or a second transiting planet in the TrES-1 system?

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