Spectroscopic variations of the V 444 CYG system

Details Spectroscopic variations of the V 444 CYG system Spectroscopic variations of the V 444 CYG system

Dec 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...226..137a&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 226, no. 1, Dec. 1989, p. 137-144.

Astronomy and Astrophysics

Astrophysics

4

Astronomical Spectroscopy, Eclipsing Binary Stars, Mass Ratios, Wolf-Rayet Stars, Emission Spectra, H Alpha Line, Periodic Variations, Spectrum Analysis

Scientific paper

New data are presented on the spectroscopic variation of the binary star V 444 Cyg (WN 5 + O6), observed between 1979 and 1982 at a moderate resolution (2 A) in the red spectral range. The radial velocity curves of the emission lines (WN star) and the absorption lines (O star) were found to have an amplitude ratio of about 2.7, leading to a mass ratio M(WN)/M(O) of about 0.4. The velocity amplitudes observed are larger than those found by Muench (1950).

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