The Optical Spectrum of HD 4004 (WN4b). Evidence of Variability

Details The Optical Spectrum of HD 4004 (WN4b). Evidence of Variability The Optical Spectrum of HD 4004 (WN4b). Evidence of Variability

Dec 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aca....48..729n&link_type=abstract

Acta Astronomica, v.48, pp.729-746, (1998).

Astronomy and Astrophysics

Astronomy

3

Stars: Wolf-Rayet, Stars: Individual: Hd 4004

Scientific paper

We describe the optical spectrum of Wolf-Rayet star HD 4004 (WN4b) in the wavelength range from 3900 to 7000 A. Present observations reveal the stratification effects in the envelope of this star. Also evidence for variability of HeII line lambda 5411 is presented. Since no radial velocity variations are observed in the optical spectrum of this star we conclude that HD 4004 is a single Wolf-Rayet star and the observed emission line profile changes are of intrinsic nature.

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