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

M. Oshagh, I. Boisse, G. Boué, M. Montalto, N. C. Santos, X. Bonfils, N. Haghighipour

We present an improved version of SOAP 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 the 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.

planetary systems – methods: numerical – techniques: photometric – techniques: radial velocities – stars: activity

Astronomy & Astrophysics
Volume 549, Number of pages A35_1
2013 January

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Faculdade de Ciências da Universidade de Lisboa Universidade do Porto Faculdade de Ciências e Tecnologia da Universidade de Coimbra
Fundação para a Ciência e a Tecnologia COMPETE 2020 PORTUGAL 2020 União Europeia