Comments on the ultraviolet spectrum of gamma(2) Velorum

Details Comments on the ultraviolet spectrum of gamma(2) Velorum Comments on the ultraviolet spectrum of gamma(2) Velorum

Jan 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...276..281s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 276, Jan. 1, 1984, p. 281-285.

Other

8

Binary Stars, Stellar Envelopes, Stellar Spectra, Ultraviolet Absorption, Ultraviolet Spectra, Wolf-Rayet Stars, Iue, Radial Velocity, Resonance Lines, Spectral Line Width

Scientific paper

A table of spectral features, including narrow, very broad, and 'photospheric' lines, in the ultraviolet spectrum of the Wolf-Rayet binary gamma(2) Velorum is given together with radial velocities at phase 0.99. The very broad lines display P Cygni profiles. Ten weak absorption features are tentatively assigned to blends of numerous lines of Fe IV, and three other similar features are possibly due to Fe V blends. These iron lines appear to be associated with the Wolf-Rayet component. The narrow features are present with a wide range of ionization. The Si IV, and probably C IV, features are circumstellar, while the other narrow absorptions are either interstellar or possibly a combination of interstellar and circumstellar. A model is proposed for the outer layers of the extended envelope of the Wolf-Rayet star.

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