Analytical solutions for radiation-driven winds in massive stars II : The δ-slow regime

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 veloc...

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Detalles Bibliográficos
Autores principales: Araya, I., Christen, A., Curé, Michel, Cidale, Lydia Sonia, Venero, Roberto Oscar José, Arcos, C., Gormaz Matamala, A. C., Haucke, Maximiliano, Escarate, P., Clavería, H.
Formato: Articulo Preprint
Lenguaje:Inglés
Publicado: 2021
Materias:
Ciencias Astronómicas
Física
hydrodynamics
methods: analytical
stars: early-type
stars: mass-loss
stars: winds, outflows
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/124521
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-124521
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
Física
hydrodynamics
methods: analytical
stars: early-type
stars: mass-loss
stars: winds, outflows
spellingShingle Ciencias Astronómicas
Física
hydrodynamics
methods: analytical
stars: early-type
stars: mass-loss
stars: winds, outflows
Araya, I.
Christen, A.
Curé, Michel
Cidale, Lydia Sonia
Venero, Roberto Oscar José
Arcos, C.
Gormaz Matamala, A. C.
Haucke, Maximiliano
Escarate, P.
Clavería, H.
Analytical solutions for radiation-driven winds in massive stars II : The δ-slow regime
topic_facet Ciencias Astronómicas
Física
hydrodynamics
methods: analytical
stars: early-type
stars: mass-loss
stars: winds, outflows
description 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.
format Articulo
Preprint
author Araya, I.
Christen, A.
Curé, Michel
Cidale, Lydia Sonia
Venero, Roberto Oscar José
Arcos, C.
Gormaz Matamala, A. C.
Haucke, Maximiliano
Escarate, P.
Clavería, H.
author_facet Araya, I.
Christen, A.
Curé, Michel
Cidale, Lydia Sonia
Venero, Roberto Oscar José
Arcos, C.
Gormaz Matamala, A. C.
Haucke, Maximiliano
Escarate, P.
Clavería, H.
author_sort Araya, I.
title Analytical solutions for radiation-driven winds in massive stars II : The δ-slow regime
title_short Analytical solutions for radiation-driven winds in massive stars II : The δ-slow regime
title_full Analytical solutions for radiation-driven winds in massive stars II : The δ-slow regime
title_fullStr Analytical solutions for radiation-driven winds in massive stars II : The δ-slow regime
title_full_unstemmed Analytical solutions for radiation-driven winds in massive stars II : The δ-slow regime
title_sort analytical solutions for radiation-driven winds in massive stars ii : the δ-slow regime
publishDate 2021
url http://sedici.unlp.edu.ar/handle/10915/124521
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