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Astron. Astrophys. Suppl. Ser.
Volume 118, Number 3, September 1996
Page(s) 421 - 428
Published online 15 September 1996
The peculiar interacting binary V Sagittae: Brightness variations in 1932 -- 1994 DOI: 10.1051/aas:1996203

Astronomy and Astrophysics Supplement Series, Vol. 118, September 1996, 421-428

The peculiar interacting binary V Sagittae: Brightness variations in 1932 -- 1994 gif

V. Simon

Send offprint requests to: V. Simon:

Astronomical Institute, Academy of Sciences, 251 65 Ondrejov, Czech Republic

Received October 30; accepted November 22, 1995


The analysis of the historical light curve revealed several kinds of variations not connected with the orbital modulation: a) large outbursts consisting of a primary (amplitude about 2 mag) and a fainter secondary peak; b) transitions from the high to the low state and vice versa; c) small outbursts (amplitude about 0.7 mag) on the time scale of 15-20 days in the high state; d) year-to-year variations of brightness. It is shown that drastic changes of the photometric activity occurred in the course of the last six decades. An interpretation of this activity in terms of mass transfer events in a strongly interacting binary containing an accreting white dwarf is offered.

Key words: stars: binaries: general --- stars: emission-line, Be --- novae, cataclysmic variables --- stars: variables: other --- circumstellar matter --- stars: individual: V Sge

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