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| Paper: |
Line variations in Betelgeuse |
| Volume: |
9, Cool Stars, Stellar Systems, and the Sun: Sixth Cambridge Workshop |
| Page: |
459 |
| Authors: |
Toussaint, Frank; Reimers, Dieter |
| Abstract: |
The deviations of the observed profiles from a simple photospheric line are extracted at several epochs. The subtraction of two spectra taken in January 1989 shows the shape of the chromospheric CaII K2-component. Explanations for the higher chromospheric activity as compared to the photosphere in 1989 are offered. |
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