Talk abstract details

Evolution of the spots on CoRoT-2
D. Yuri Simplicio Neto and Adriana Valio


CoRoT-2 is a very active young star and is known to have many spots on its surface. Individual spot can be detected during the eclipse of the orbiting hot Jupiter of CoRoT-2. When the planet crosses in front of a starspot it produces small bumps on the transit light curve. From the analysis of these bumps it is possible to determine the physical characteristics of the spots such as size, position, and temperature. Using the rotation period of 4.54 d for CoRoT-2, we have calculated the longitude of the spot on the rotating reference frame of the star. From these we identified recurrent spots on different transits. By following the same spot on sequential transits, the evolution of individual spots characteristics and their lifetime were studied. The study of a total of 34 individual spots yields average temperature of $4700 \pm 300$ K, sizes of $(5.8 \pm 1.0)\times 10^4$ km, and with mean lifetimes of $17 \pm 5$ days. These values are in agreement with previous studies.

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