Evidence for enhanced chromospheric Ca II H and K emission in stars with close-in extrasolar planets

@article{Krejov2012EvidenceFE,
  title={Evidence for enhanced chromospheric Ca II H and K emission in stars with close-in extrasolar planets},
  author={Tereza Krej{\vc}ov{\'a} and J. Budaj},
  journal={Astronomy and Astrophysics},
  year={2012},
  volume={540}
}
The planet-star interaction is manifested in many ways. It has been found that a close-in exoplanet causes small but measurable variability in the cores of a few lines in the spectra of several stars, which corresponds to the orbital period of the exoplanet. Stars with and without exoplanets may have different properties. The main goal of our study is to search for the influence that exoplanets might have on atmospheres of their host stars. Unlike the previous studies, we do not study changes… Expand

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