New Data on A-Type Disk Stars
Abstract
After a review of what has been learned to date about the Ti II disk lines at λλ3759 and 3761 in the spectra of rapidly rotating A dwarfs, new measures obtained during the past 10 yr are given. They show stars with quasi-periodic variations of 15-30 yr (as in Be stars) and probably longer. The star HR 10 has double disk lines that change relative strengths during 9 yr, consistent with the behavior found by others. They support the model by others of erratic longward components representing material falling onto the star.
- Publication:
-
The Astrophysical Journal Supplement Series
- Pub Date:
- February 2008
- DOI:
- 10.1086/522698
- Bibcode:
- 2008ApJS..174..499A
- Keywords:
-
- stars: emission-line;
- Be;
- stars: individual: HR 10;
- stars: mass loss