Magnesium emission variability among late-type giant stars
Journal Article
·
· Astrophys. J.; (United States)
We have investigated the variability of the emission cores in the h and k lines of Mg II in a sample of 21 late-type giants. We have used resolution line profiles obtained by IUE to determine not only the total emission intensity, but also the ratio of the intensities of the shortward and longward components of the doubly-reversed emission. We argue that variations in the total emission intensity are indicative of variations in chromospheric heating, while variations in the ratio can be interpreted in terms of variations in structures in the corona and outer atmosphere.
- Research Organization:
- Bartol Research Foundation of the Franklin Institute, University of Delaware
- OSTI ID:
- 5100477
- Journal Information:
- Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 253:2; ISSN ASJOA
- Country of Publication:
- United States
- Language:
- English
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