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V1341 Cygni the Optical Counterpart of the X-Ray Source Cyg X-2статья
- Авторы: Goranskii V.P., Lyutyi V.M.
- Журнал: SOVIET ASTRONOMY
- Том: 32
- Номер: 2
- Год издания: 1988
- Первая страница: 193
- Последняя страница: 201
- Аннотация: The radiation of the Population II main-sequence F-type subdwarf is predominating in the bands of the UBV system in the spectrum of V1341 Cygni. This is a star in the evolutionary stage of a blue straggler with a mass close to the solar one. The periodic component of its light with amplitude of 0.27 mag B in the quiet state is caused partly by ellipsoidal shape of its surface distorted by gravitational influence of the X-ray companion. There is a low-luminosity accretion disk in the system, the contribution of which to the total light in the B band varies in the range between 0 and 50%. Some active stages, i.e., outbursts of long duration, can be connected with disk instabilities typical for dwarf novae. Comparing spectral and photometric data, the authors obtain EB-V = 0.22±0.05 mag and determine the distance of 1600 pc with possible limits of 1300 and 2100 pc.
- Добавил в систему: Горанский Виталий Петрович