WBVR Observations of the Variable Star V1341 Cyg in 1986-1992

Details WBVR Observations of the Variable Star V1341 Cyg in 1986-1992 WBVR Observations of the Variable Star V1341 Cyg in 1986-1992

2009-07-22

arxiv.org/abs/0907.3822v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

6 pages, 0 figures

Scientific paper

We report the results of WBVR photometry of the massive close x-ray binary V1341 Cyg=Cyg X-2 in 1986-1992. In the "off" state the amplitudes of the periodic component of light variations lie in the $0^{m}.265 - 0^{m}.278$ and $0^{m}.290 - 0^{m}.320$ intervals for the B- and W-bands, respectively, and is determined by the ellipsoidal shape of the optical component, which is distorted by the gravitational influence of its x-ray companion. Some of the active states of the system (long outbursts) may be due to the instability of the accretion disk (AD) and, possibly, to the nonstationarity of the gaseous flows and other accretion formations. The close binary system (CBS) contains a low-luminosity AD.

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