ON THE CAUSE OF LUMINOSITY COLOR VARIATION IN THE ACTIVE BINARY-SYSTEM DH LEONIS

Authors
ASLAN Z
Citation
Z. Aslan, ON THE CAUSE OF LUMINOSITY COLOR VARIATION IN THE ACTIVE BINARY-SYSTEM DH LEONIS, Astronomy and astrophysics, 273(2), 1993, pp. 47-48
Citations number
10
Categorie Soggetti
Astronomy & Astrophysics
Journal title
Astronomy and astrophysics → ACNP
ISSN journal
00046361
Volume
273
Issue
2
Year of publication
1993
Pages
47 - 48
Database
ISI
SICI code
0004-6361(1993)273:2<47:OTCOLC>2.0.ZU;2-Y
Abstract
The long term photometric activity of DH Leonis has been compared with the predictions of Applegate's theory that magnetic cycles cause lumi nosity variation due entirely to temperature variations. Observations show that DH Leo is bluer when it is brighter, but it is found that th e slope DELTA(B - V)/DELTAV is not different from the main sequence sl ope, which indicates that radius change can not be ruled out.