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MG II emission lines in the spectra of cool, high luminosity stars

  • Kenneth G. Carpenter
  • Robert E. Stencel
  • Joseph E. Pesce
Heating of Stellar Chromospheres and Coronae
Part of the Lecture Notes in Physics book series (LNP, volume 291)

Abstract

We present the initial results of a survey of the Mg II emission lines in the spectra of K and M giants, bright giants, and supergiants. Profiles of the Mg II h and k lines in 12 such stars are shown in a relative spectral type/luminosity class grid. Plots based on the h-line data illustrate the existence of a Wilson-Bappu. effect in these lines and of a slight dependence of the line asymmetry on V-R color. A time series of Mg II profiles for the M3 giant Gamma Cru show that the Mg II profiles have not undergone the profile shape changes seen in the Fe II lines from this star over the same time period.

Keywords

Emission Line Slight Dependence Stellar Temperature Colorado Boulder Class Grid 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 1987

Authors and Affiliations

  • Kenneth G. Carpenter
    • 1
  • Robert E. Stencel
    • 1
  • Joseph E. Pesce
    • 1
  1. 1.Center for Astrophysics and Space AstronomyUniversity of ColoradoBoulder

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