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

2009/07/22 by A. N. Sazonov, Sazonov, A. N. · 1 citation
Engineering · Physics and Astronomy · #Astronomical Observations and Instrumentation #Astrophysical Phenomena and Observations #FOS: Physical sciences #Solar and Stellar Astrophysics (astro-ph.SR) #Stellar, planetary, and galactic studies #astro-ph.SR

paper · pdf · doi:10.48550/arxiv.0907.3822

6 pages, 0 figures

arxiv created 2009/07/22 · openalex publication_date 2009/07/22 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

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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