Can stellar activity make a planet seem misaligned?

11 Jul 2016 Oshagh M. Dreizler S. Santos N. C. Figueira P. Reiners A.

Several studies have shown that the occultation of stellar active regions by the transiting planet can generate anomalies in the high-precision transit light curves, and these anomalies may lead to an inaccurate estimate of the planetary parameters (e.g., the planet radius). Since the physics and geometry behind the transit light curve and the Rossiter- McLaughlin effect (spectroscopic transit) are the same, the Rossiter-McLaughlin observations are expected to be affected by the occultation of stellar active regions in a similar way... (read more)

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Categories


  • EARTH AND PLANETARY ASTROPHYSICS
  • SOLAR AND STELLAR ASTROPHYSICS