Current State of the Modelling of Photospheric Activity
I briefly review the current state of the modelling of photospheric activity based on the high-precision optical light curves obtained with MOST, CoRoT, and Kepler. These models can be used to search for active longitudes where activity is preferentially concentrated, estimate the amplitude of stellar differential rotation, and look for short-term activity cycles as, e.g., in the case of CoRoT-2. In the case of a late-type star accompanied by a transiting hot Jupiter, the small light modulations observed during transits when a dark spot is occulted by the disc of the planet are also briefly considered. They can be used to derive information on individual active regions as well as on stellar rotation and the spin–orbit alignment of the system.
KeywordsLight Curve Differential Rotation Sunspot Group Active Longitude Spot Modelling
The author wishes to thank the SOC of the 20th Stellar Pulsation Conference for their kind invitation to attend the Conference and their nice hospitality in Granada, and Prof. B. Mosser for interesting discussions.
- 27.Sanchis-Ojeda, R., Winn, J.N. (2011) arXiv:1107.2920Google Scholar