Hostname: page-component-cd9895bd7-gbm5v Total loading time: 0 Render date: 2024-12-27T05:09:55.659Z Has data issue: false hasContentIssue false
  • English
  • Français

Narrow components in UV line profiles as evidence for a two component stellar wind for 0 and B stars

Published online by Cambridge University Press:  12 April 2016

Henny J.G.L.M. Lamers
Henny J.G.L.M. Lamers*
Affiliation:
Space Research Laboratory, Astronomical Institute, Utrecht, The Netherlands

Extract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

The UV resonance lines of early type stars show narrow absorption components, with a width of the order of 300 km s-1, superimposed on the wider P Cygni profiles. Such narrow components have been detected in the Copernicus spectra of a few early type stars by Morton (1976) and Snow and Morton (1979). The variability of these components was studied by Snow (1977) who compared two scans of the UV line profiles of 15 stars taken about four years apart. He found that the narrow components do not change in velocity (except for the CIII λ 1175 line in ζ, Pup) but that the strength of the components can change drastically. In some stars the narrow components were present in only one of the two spectra. We studied the characteristics of these narrow components in the Copernicus spectra (Snow and Jenkins, 1977). The stars are listed in Table 1. Examples of these narrow components are shown in Figure 1.

Type
Session III - Winds From Early Type Stars: Theory
Information
International Astronomical Union Colloquium , Volume 59: Effects of Mass Loss on Stellar Evolution , 1981 , pp. 181 - 186
Copyright
Copyright © Reidel 1981

References

Henrichs, H., Hammerschlag-Hensberge, G., Lamers, H.J.G.L.M., 1980 (these proceedings) Google Scholar
Lamers, H.J.G.L.M., Gathier, R., Snow, T.P. 1980, Ap. J. (Letters) in pressGoogle Scholar
Lucy, L.B. and White, R.L. 1980, Ap. J. (in press)Google Scholar
Morton, D.C. 1976, Ap. J. 203, 386 CrossRefGoogle Scholar
Snow, T.P. 1976, Ap. J. 217, 760 Google Scholar
Snow, T.P., Jenkins, E.B. 1977, Ap. J. Suppl. 33, 269 Google Scholar
Snow, T.P., Morton, D.C. 1976, Ap. J. Suppl. 32, 429 Google Scholar