Other
Scientific paper
Aug 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...359..211r&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 359, Aug. 10, 1990, p. 211-218. Research supported by the Space Telescope S
Other
37
Eclipsing Binary Stars, Linear Polarization, Polarization (Waves), Wolf-Rayet Stars, Cygnus Constellation, Electron Scattering, Light Curve
Scientific paper
Precision broad-band blue light monitoring in linear polarization of the bright Cygnus W-R + O system V444 Cyg is reported. Analysis of the data yields an orbital inclination i = 78.5 deg, in good agreement with previous estimates based on polarimetry and on the analysis of light curves. In addition, V444 Cyg shows rapid polarimetric modulation around phase 0.5, when the O star companion eclipses the scattering electrons located primarily in the dense inner W-R wind. Simple modeling of the polarization eclipse based on a spherical electron envelope around the W-R star yields a satisfactory fit to the data. This model also supports the small value of the W-R core radius previously proposed by other authors.
Nicole St.-Louis
Bastien Pierre
Drissen Laurent
Moffat Anthony F. J.
Robert Carmelle
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