Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994ap%26ss.221..227c&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 221, no. 1-2, p. 227-237
Astronomy and Astrophysics
Astronomy
2
Eclipsing Binary Stars, Infrared Astronomy, O Stars, Stellar Physics, Stellar Winds, Wolf-Rayet Stars, Accretion Disks, Brightness, Infrared Spectra, Light Curve, Stellar Envelopes, Stellar Models
Scientific paper
Strong increasing of the width and depth of the secondary minimum of the light curve of V444 Cyg Wolf-Rayet eclipsing binary discovered by Cherepashchuk and Khaliullin (1973, 1975) from simultaneous narrow band continuum observations (lambda lambda 4244-7512 A) have been confirmed by new quasi-simultaneous UJK observations. This increasing of the width and the depth of the secondary minimum implies strong increasing of the radius of the extended atmosphere of the WN5 star with wavelength, which cannot be explained be the theory of homogeneous WR wind. These data can be understood in the model of WR wind proposed by Cherepashchuk et al. (1984). New data, supporting the reliability of the light curve solution for V444 Cyg of Cherepashchuk (1975) are presented.
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