K2 reveals pulsed accretion driven by the 2 Myr old hot Jupiter CI Tau b
2018
CI Tau is a young (~2
Myr) classical
T Tauri starlocated in the Taurus star forming region.
Radial velocityobservations indicate it hosts a
Jupiter-sized planet with an
orbital periodof approximately 9 days. In this work, we analyze time series of CI Tau's photometric variability as seen by K2. The lightcurve reveals the
stellar rotationperiod to be ~6.6 d. Although there is no evidence that CI Tau b transits the host star, a ~9 d signature is also present in the lightcurve. We believe this is most likely caused by planet-disk interactions which perturb the accretion flow onto the star, resulting in a periodic modulation of the brightness with the ~9 d period of the planet's orbit.
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