Self-consistent hydrodynamic solutions for line-driven winds of O stars in the m-CAK formalism
Abstract
The wind of massive stars is driven mainly by the transfer of momentum from the radiation field, to the stellar atmosphere through a large number of line transitions (m-CAK theory). In this work, we present some of the results of a self-consistent procedure to calculate the wind hydrodynamic solution (velocity field and mass-loss rate) along with the line-force parameters, considering the contribution of more than $900,000$ line transitions.The models were computed for stars with effective temperatures above $32,000~\rm{K}$ and surface gravities higher than $3.4~\rm{dex}$, also considering different metallicities. We compare the synthetic line profiles obtained from our hydrodynamic solutions using the code FASTWIND, with observed O stellar spectra. We show that the computed line profiles fits quite well the observations when appropriate clumping factors are taken into account.
- Publication:
-
Boletin de la Asociacion Argentina de Astronomia La Plata Argentina
- Pub Date:
- July 2020
- Bibcode:
- 2020BAAA...61B.105G
- Keywords:
-
- hydrodynamics;
- methods: analytical;
- stars: early-type;
- stars: mass-loss;
- stars: winds;
- outflows