Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986esasp.263..389s&link_type=abstract
In ESA Proceedings of an International Symposium on New Insights in Astrophysics. Eight Years of UV Astronomy with IUE p 389-39
Astronomy and Astrophysics
Astrophysics
7
Line Spectra, Stellar Spectra, Stellar Winds, Variability, Wolf-Rayet Stars, Iue, Ultraviolet Spectroscopy, Wind Velocity
Scientific paper
A set of IUE observations was secured in 1985/86 to search for variability in 2 WR stars. The first star, HD 96548 (WN8+?) is a WR+compact candidate (p-4.76d). The SiRV absorption edge gradually decreases by 400 km/sec over the 5 day 1985 observing period. This new dataset alone, and combined with other epochs (1979 to 1982, 1983, and 1986) shows that the SiRV variations do not have the required phase dependence to be caused by the Hatchett and McCray effect. It is concluded that the UV variations are not due to a compact companion and are instead intrinsic to the WR star. The second star HD 93131 (WN7abs) is believed to be single; the IUE data show that it has a constant stellar wind over at least the 5 day observing period, and probably much longer, since 1978 to 1981 archive data are consistent with the 1985 observations.
Conti Peter S.
Garmany Catharine D.
Smith Lleweilun J.
Willis Alan J.
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