Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-02-07
Astrophys.J. 639 (2006) L75-L78
Astronomy and Astrophysics
Astrophysics
12 pages, 2 figures; to be published in ApJL
Scientific paper
10.1086/503157
We report the detection with FUSE of strong, highly blue-shifted absorption features appearing in the absorption troughs of practically all major P Cygni profiles in the presumably single Wolf-Rayet star WR135. These features also appear in the shock-sensitive OVI 1032/38 \AA doublet, coincident both in time and velocity space with the rest of the lower-ionization species. Choosing between two alternative interpretations: large-scale, coherent structures vs. localized, random shocks, we favor the latter. The absolute value of velocity, as well as velocity dispersion in the shocked region, the density of the shocked gas, and the time scales of the observed variability allow us to relate the observed shocks to the incidence of numerous over-dense clumps (blobs) in the wind of a hot, massive star.
Fullerton Alex W.
Marchenko Sergey V.
Moffat Anthony F. J.
St-Louis Nicole
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