Phase-correlated P Cygni profile variations of the C III multiplet in UW Canis Majoris

Details Phase-correlated P Cygni profile variations of the C III multiplet in UW Canis Majoris Phase-correlated P Cygni profile variations of the C III multiplet in UW Canis Majoris

Feb 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a....94..285d&link_type=abstract

Astronomy and Astrophysics, vol. 94, no. 2, Feb. 1981, p. 285-289.

Astronomy and Astrophysics

Astronomy

5

Eclipsing Binary Stars, O Stars, Spaceborne Astronomy, Ultraviolet Astronomy, Line Spectra, Oao 3, Photosphere, Radial Velocity

Scientific paper

The interacting close binary system UW CMa has been observed, in the wavelength range from 1161 to 1188 A, continuously during a complete orbital cycle in 1979 with the Copernicus (OAO-3) U2 spectrometer. The C III multiplet at 1175 A, observed as a P Cygni feature, exhbits a clear dependence on the orbital phase of the binary; the radial velocity variation of this feature lags behind that of the O7 primary component by 0.1 orbital phase, which agrees with the anticipations in an earlier study by the same authors. The radiation-driven matter, flowing out of the binary, originates in the primary component.

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