Mg I emission lines at 12 and 18 mu m in K giants

  title={Mg I emission lines at 12 and 18 mu m in K giants},
  author={J. Sundqvist and N. Ryde and G. Harper and A. Kruger and M. Richter},
  journal={Astronomy and Astrophysics},
Context. The solar mid-infrared metallic emission lines have already been observed and analyzed well, and the formation scenario of the Mg I 12 mu m lines has been known for more than a decade. Detections of stellar emission at 12 mu m have, however, been limited to Mg I in very few objects. Previous modeling attempts have been made only for Procyon and two cool evolved stars, with unsatisfactory results for the latter. This prevents the lines' long predicted usage as probes of stellar magnetic… Expand

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