Mg II chromospheric radiative loss rates in cool active and quiet stars

@article{Cardini2005MgIC,
  title={Mg II chromospheric radiative loss rates in cool active and quiet stars},
  author={D. Cardini},
  journal={Astronomy and Astrophysics},
  year={2005},
  volume={430},
  pages={303-311}
}
  • D. Cardini
  • Published 2005
  • Physics
  • Astronomy and Astrophysics
  • The $\ion{Mg}{ii}$ k emission line is a good indicator of the level of chromospheric activity in late-type stars. We investigate the dependence of this activity indicator on fundamental stellar parameters. To this purpose we use IUE observations of the $\ion{Mg}{ii}$ k line in 225 late-type stars of luminosity classes I–V, with different levels of chromospheric activity. We first re-analyse the relation between $\ion{Mg}{ii}$ k line luminosity and stellar absolute magnitude, performing linear… CONTINUE READING
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