ISSN:
1572-946X
Keywords:
Line: formation
;
Stars: atmospheres
;
Stars: early type
;
Stars: mass-loss
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract On the basis of a a careful analysis of resonance line formation (both for singlets and doublets) in structured winds, presenttime dependent models of the line driven winds of hot stars (Owocki et al., this volume; Feldmeier, this volume) are shown to be able to explain a number of observational features with respect to variability and structure: they are (in principle) able to reproduce theblack andbroad troughs (without any artificial “turbulence velocity”) and the “blue edge variability” observed in saturated resonance lines; they might explain the “long lived narrow absorption components” often observed in unsaturated lines at high velocities; they predict a relation between the “edge velocity” of UV-lines and the radiation temperature of the observed X-ray emission. As a first example of the extent to which theoretical models can be constrained by comparisons between observations and profiles calculated by spectrum synthesis from structured winds, we show here that models with deep-seated onset of structure formation (≳ 1.1R * ) produce resonance lines which agreequalitatively with observational findings; in contrast, the here presented models with structure formation only well out in the wind (≳ 1.6R * ) fail in this respect.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01091171
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