IUE observations of variability in the WN6 star HD 192163

Details IUE observations of variability in the WN6 star HD 192163 IUE observations of variability in the WN6 star HD 192163

Dec 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...226..249s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 226, no. 1, Dec. 1989, p. 249-264. Research supported by the Ministere de l'Ed

Astronomy and Astrophysics

Astrophysics

22

Iue, Stellar Spectra, Variable Stars, Wolf-Rayet Stars, O Stars, Spectral Line Width, Stellar Luminosity, Stellar Orbits, Stellar Winds, X Ray Spectra

Scientific paper

Results are presented of a study of 77 high-resolution IUE spectra of the WN6 star HD 192163, for which new IUE observations obtained over 48 hrs in 1987 were combined with data drawn from the IUE archive, covering various epochs over the 1978-1987 period. The 1987 series of 48 spectra were found to exhibit significant variability over a period of 24 hrs in the N IV 1718-A, C IV 1550-A, and He II 1640-A P Cygni profiles. The possible causes of these variabilities are considered in terms of binary-induced changes due to a compact companion and intrinsic stellar wind variations.

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