Time-variable Electromagnetic Star–Planet Interaction: The TRAPPIST-1 System as an Exemplary Case

  title={Time-variable Electromagnetic Star–Planet Interaction: The TRAPPIST-1 System as an Exemplary Case},
  author={Christian Fischer and Joachim Saur},
  journal={The Astrophysical Journal},
Exoplanets sufficiently close to their host star can in principle couple electrodynamically to the star. This process is known as electrodynamic star–planet interaction (SPI). The expected emission associated with this coupling, however, is difficult to observe due to the bright intrinsic stellar emission. Identification of time variability in the stellar light curve is one of the most promising approaches to identify SPI. In this work we therefore systematically investigate various mechanisms… 

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