Exoplanets Hidden by Stellar Activity



Dr. Elodie Hèbrard

York University

Physics and Astronomy Department



The detection extra-solar planets through radial-velocity searches is likely limited by the intrinsic magnetic activity of the host stars. The correlated « noise » that arises from their natural radial-velocity variability (jitter) can easily mimic and hide the orbital signals of super-Earth and Earth-mass exoplanets, or even of a giant planets for the most active and young stars.

The modeling of the RV jitter is thus essential to extrasolar planets searches. I will present here different techniques used to filter out the RV activity jitter and that allowed to unveil one of the youngest hot Jupiter discovered so far, V830 Tau b.

Please complete the following survey after watching the seminar:

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Note: The survey is Mandatory for TEPS trainees!