A&A 417, 1039-1045 (2004)
DOI: 10.1051/0004-6361:20034372

Kinematic model inversions of hot star recurrent DAC data - tests against dynamical CIR models

J. Krticka^{1, 2, 3}, R. K. Barrett¹, J. C. Brown¹ and S. P. Owocki<sup>1, 4

1</sup>  Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, UK
²  Ústav teoretické fyziky a astrofyziky PrF MU, 611 37 Brno, Czech Republic
³  Astronomický ústav, Akademie ved Ceské republiky, 251 65 Ondrejov, Czech Republic
⁴  Bartol Research Institute, University of Delaware, Newark, DE 19716, USA

(Received 22 September 2003 / Accepted 21 December 2003)

Abstract
The Discrete Absorption Components (DACs) commonly observed in the ultraviolet lines of hot stars have previously been modelled by dynamical simulations of Corotating Interaction Regions (CIRs) in their line-driven stellar winds. Here we apply the kinematic DAC inversion method of Brown et al. to the hydrodynamical CIR models and test the reliability of the results obtained. We conclude that the inversion method is able to recover valuable information on the velocity structure of the mean wind and to trace movement of velocity plateaux in the hydrodynamical data, though the recovered density profile of the stream is correct only very near to the stellar surface.

Key words: stars: early-type -- stars: winds, outflows -- stars: mass-loss -- line: profiles

Offprint request: J. Krticka, krticka@physics.muni.cz

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