HIGH-STATE LOW-STATE BEHAVIOR IN THE LONG-TERM LIGHT-CURVE OF V-SAGITTAE/

Citation
Jw. Robertson et al., HIGH-STATE LOW-STATE BEHAVIOR IN THE LONG-TERM LIGHT-CURVE OF V-SAGITTAE/, The Astronomical journal, 113(2), 1997, pp. 787-791
Citations number
19
Categorie Soggetti
Astronomy & Astrophysics
Journal title
ISSN journal
00046256
Volume
113
Issue
2
Year of publication
1997
Pages
787 - 791
Database
ISI
SICI code
0004-6256(1997)113:2<787:HLBITL>2.0.ZU;2-V
Abstract
The 1990-1995 light curve of V Sagittae is shown to have brightness tr ansitions lasting several days which separate extended intervals lasti ng months in a bright or faint state. These transitions recur with sem i-regularity at a characteristic period of similar to 240 days. Primar y and secondary eclipses are conspicuous in the faint state, but are w eaker when the system is bright. Our high-state spectra through primar y eclipse show no obvious evidence for the rotational disturbance expe cted from an accretion disk. (C) 1997 American Astronomical Society.