Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-01-12
Astron.Astrophys. 417 (2004) 1003-1016
Astronomy and Astrophysics
Astrophysics
Accepted for publication in A&A. 17 pages
Scientific paper
10.1051/0004-6361:20034030
New numerical models of line-driven stellar winds of late O stars are presented. Statistical equilibrium (NLTE) equations of the most abundant elements are solved. Properly obtained occupation numbers are used to calculate consistent radiative force and radiative heating terms. Wind density, velocity and temperature are calculated as a solution of model hydrodynamical equations. Contrary to other published models we account for a multicomponent wind nature and do not simplify the calculation of the radiative force (e.g. using force multipliers). We discuss the convergence behaviour of our models. The ability of our models to predict correct values of mass-loss rates and terminal velocities of selected late O stars (mainly giants and supergiants) is demonstrated. The systematic difference between predicted and observed terminal velocities reported in the literature has been removed. Moreover, we found good agreement between the theoretical wind momentum-luminosity relationship and the observed one for Cyg OB2 supergiants.
Krticka Jiri
Kubát Jiri
No associations
LandOfFree
NLTE models of line-driven stellar winds I. Method of calculation and first results for O stars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with NLTE models of line-driven stellar winds I. Method of calculation and first results for O stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and NLTE models of line-driven stellar winds I. Method of calculation and first results for O stars will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-372557