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Title: Linear polarization from tidal distortions of the Cygnus X-1 primary component

Abstract

The variability that would be introduced into the optical linear polarization of the Cyg X-1 (V1357 Cyg) binary system due to tidal deformation or shallow partial eclipses of the primary component is calculated, allowing for the optical-depth variation of the source function and single-scattering albedo in a model stellar atmosphere with Teff = 32,900 K and log g = 3.1. Angular distributions of the intensity and polarization per unit area of the stellar surface are derived for selected wavelengths, and the wavelength dependence of the corresponding polarization variability amplitude Ap is predicted. In the optical range Ap should be less than about 0.025 percent, but in principle might be detectable at short wavelengths. The observed V-band variations in p are, however an order of magnitude stronger and cannot result from tidal distortions or partial eclipses. 24 references.

Authors:
; ; ;
Publication Date:
Research Org.:
Moskovskii Gosudarstvennyi Universitet, Moscow, USSR; Astronomicheskii Sovet, Moscow, USSR; Leningradskii Gosudarstvennyi Universitet, Leningrad, USSR; Spetsial'naia Astrofizicheskaia Observatoriia, Nizhni Arkhyz, USSR
OSTI Identifier:
6643392
Resource Type:
Journal Article
Journal Name:
Sov. Astron. (Engl. Transl.); (United States)
Additional Journal Information:
Journal Volume: 30
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; BINARY STARS; GRAVITATIONAL INTERACTIONS; POLARIZATION; COSMIC X-RAY SOURCES; ANGULAR DISTRIBUTION; STAR MODELS; STELLAR ATMOSPHERES; VARIATIONS; ATMOSPHERES; BASIC INTERACTIONS; COSMIC RAY SOURCES; DISTRIBUTION; INTERACTIONS; MATHEMATICAL MODELS; STARS; 640102* - Astrophysics & Cosmology- Stars & Quasi-Stellar, Radio & X-Ray Sources

Citation Formats

Bochkarev, N G, Karitskaia, E A, Loskutov, V M, and Sokolov, V V. Linear polarization from tidal distortions of the Cygnus X-1 primary component. United States: N. p., 1986. Web.
Bochkarev, N G, Karitskaia, E A, Loskutov, V M, & Sokolov, V V. Linear polarization from tidal distortions of the Cygnus X-1 primary component. United States.
Bochkarev, N G, Karitskaia, E A, Loskutov, V M, and Sokolov, V V. 1986. "Linear polarization from tidal distortions of the Cygnus X-1 primary component". United States.
@article{osti_6643392,
title = {Linear polarization from tidal distortions of the Cygnus X-1 primary component},
author = {Bochkarev, N G and Karitskaia, E A and Loskutov, V M and Sokolov, V V},
abstractNote = {The variability that would be introduced into the optical linear polarization of the Cyg X-1 (V1357 Cyg) binary system due to tidal deformation or shallow partial eclipses of the primary component is calculated, allowing for the optical-depth variation of the source function and single-scattering albedo in a model stellar atmosphere with Teff = 32,900 K and log g = 3.1. Angular distributions of the intensity and polarization per unit area of the stellar surface are derived for selected wavelengths, and the wavelength dependence of the corresponding polarization variability amplitude Ap is predicted. In the optical range Ap should be less than about 0.025 percent, but in principle might be detectable at short wavelengths. The observed V-band variations in p are, however an order of magnitude stronger and cannot result from tidal distortions or partial eclipses. 24 references.},
doi = {},
url = {https://www.osti.gov/biblio/6643392}, journal = {Sov. Astron. (Engl. Transl.); (United States)},
number = ,
volume = 30,
place = {United States},
year = {Sat Feb 01 00:00:00 EST 1986},
month = {Sat Feb 01 00:00:00 EST 1986}
}