ON THE CAUSE OF LUMINOSITY COLOR VARIATION IN THE ACTIVE BINARY-SYSTEM DH LEONIS
ASTRONOMY & ASTROPHYSICS, vol.273, no.2, 1993 (SCI-Expanded, Scopus)
- Publication Type: Article / Letter
- Volume: 273 Issue: 2
- Publication Date: 1993
- Journal Name: ASTRONOMY & ASTROPHYSICS
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Keywords: STARS, MAGNETIC-STARS, CHROMOSPHERES-STARS, VARIABLES STARS, INDIVIDUAL, DH LEONIS, PERIOD
- Akdeniz University Affiliated: No
Abstract
The long term photometric activity of DH Leonis has been compared with the predictions of Applegate's theory that magnetic cycles cause luminosity variation due entirely to temperature variations. Observations show that DH Leo is bluer when it is brighter, but it is found that the slope DELTA(B - V)/DELTAV is not different from the main sequence slope, which indicates that radius change can not be ruled out.