On the ages of exoplanet host stars

  title={On the ages of exoplanet host stars},
  author={C. Saffe and M. N. G{\'o}mez and Carolina Chavero},
  journal={Astronomy and Astrophysics},
We obtained spectra, covering the CaII H and K region, for 49 exoplanet host (EH) stars, observable from the southern hemisphere. We measured the chromospheric activity index, RHK. We compiled previously published values of this index for the observed objects as well as the remaining EH stars in an effort to better smooth temporal variations and derive a more representative value of the average chromospheric activity for each object. We used the average index to obtain ages for the group of EH… Expand
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