Evidence for Planet-induced Chromospheric Activity on HD 179949

  title={Evidence for Planet-induced Chromospheric Activity on HD 179949},
  author={Evgenya L. Shkolnik and G. A. H. Walker and David Bohlender},
  journal={The Astrophysical Journal},
  pages={1092 - 1096}
We have detected the synchronous enhancement of Ca II H and K emission with the short-period planetary orbit in HD 179949. High-resolution spectra taken on three observing runs extending over more than a year show the enhancement coincides with ϕ ~ 0 (the sub-planetary point) of the 3.093 day orbit, with the effect persisting for more than 100 orbits. The synchronous enhancement is consistent with planet-induced chromospheric heating by magnetic rather than tidal interaction, but awaits… 

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