KRTIČKA, Jiří a Jiří KUBÁT. NLTE models of line-driven stellar winds I. Method of calculation and first results for O stars. Astronomy and Astrophysics. Les Ulis Cedex, France: EDP Sciences, 2004, roč. 2004, č. 417, s. 1003-1016. ISSN 0004-6361. |
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@article{553842, author = {Krtička, Jiří and Kubát, Jiří}, article_location = {Les Ulis Cedex, France}, article_number = {417}, keywords = {stars: winds; outflows -- stars: mass-loss -- stars: early-type -- hydrodynamics}, language = {eng}, issn = {0004-6361}, journal = {Astronomy and Astrophysics}, title = {NLTE models of line-driven stellar winds I. Method of calculation and first results for O stars}, url = {http://www.edpsciences.org/articles/aa/abs/2004/15/aa0030/aa0030.html}, volume = {2004}, year = {2004} }
TY - JOUR ID - 553842 AU - Krtička, Jiří - Kubát, Jiří PY - 2004 TI - NLTE models of line-driven stellar winds I. Method of calculation and first results for O stars JF - Astronomy and Astrophysics VL - 2004 IS - 417 SP - 1003-1016 EP - 1003-1016 PB - EDP Sciences SN - 00046361 KW - stars: winds KW - outflows -- stars: mass-loss -- stars: early-type -- hydrodynamics UR - http://www.edpsciences.org/articles/aa/abs/2004/15/aa0030/aa0030.html N2 - 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. ER -
KRTIČKA, Jiří a Jiří KUBÁT. NLTE models of line-driven stellar winds I. Method of calculation and first results for O stars. \textit{Astronomy and Astrophysics}. Les Ulis Cedex, France: EDP Sciences, 2004, roč.~2004, č.~417, s.~1003-1016. ISSN~0004-6361.
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