Artículo
Analytical solutions for radiation-driven winds in massive stars - II: The δ-slow regime
Araya, I.; Christen, A.; Cure, M.; Cidale, Lydia Sonia
; Venero, Roberto Oscar José
; Arcos, C.; Gormaz Matamala, A.; Haucke, Maximiliano
; Escarate, P.; Clavería, H.
Fecha de publicación:
06/2021
Editorial:
Oxford University Press
Revista:
Monthly Notices of the Royal Astronomical Society
ISSN:
0035-8711
e-ISSN:
1365-2966
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Accurate mass-loss rates and terminal velocities from massive stars winds are essential to obtain synthetic spectra from radiative transfer calculations and to determine the evolutionary path of massive stars. From a theoretical point of view, analytical expressions for the wind parameters and velocity profile would have many advantages over numerical calculations that solve the complex non-linear set of hydrodynamic equations. In a previous work, we obtained an analytical description for the fast wind regime. Now, we propose an approximate expression for the line-force in terms of new parameters and obtain a velocity profile closed-form solution (in terms of the Lambert W function) for the δ-slow regime. Using this analytical velocity profile, we were able to obtain the mass-loss rates based on the m-CAK theory. Moreover, we established a relation between this new set of line-force parameters with the known stellar and m-CAK line-force parameters. To this purpose, we calculated a grid of numerical hydrodynamical models and performed a multivariate multiple regression. The numerical and our descriptions lead to good agreement between their values.
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Articulos(IALP)
Articulos de INST.DE ASTROFISICA LA PLATA
Articulos de INST.DE ASTROFISICA LA PLATA
Citación
Araya, I.; Christen, A.; Cure, M.; Cidale, Lydia Sonia; Venero, Roberto Oscar José; et al.; Analytical solutions for radiation-driven winds in massive stars - II: The δ-slow regime; Oxford University Press; Monthly Notices of the Royal Astronomical Society; 504; 2; 6-2021; 2550-2556
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