Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988azh....65..381g&link_type=abstract
Astronomicheskii Zhurnal (ISSN 0004-6299), vol. 65, Mar.-Apr. 1988, p. 381-395. In Russian.
Astronomy and Astrophysics
Astronomy
5
Companion Stars, F Stars, Subdwarf Stars, Ubv Spectra, Accretion Disks, Blue Stars, Stellar Evolution
Scientific paper
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 0m.27 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 = 0m.22±0m.05 and determine the distance of 1600 pc with possible limits of 1300 and 2100 pc.
Goranskij Vitalij P.
Lyutyj V. M.
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