Self-consistent hydrodynamic solutions for line-driven winds of O stars in the m-CAK formalism

GORMAZ-MATAMALA, A.; CURÉ, M.; CIDALE, L.; VENERO, R. O. J.

Viedma, Provincia de Río Negro

Congreso; 61° Reunión Anual de la Asociación Argentina de Astronomía; 2019

Asociación Argentina de Astronomía

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 presentsome of the results of a self-consistent procedure to calculate the wind hydrodynamic solution (velocity fieldand mass-loss rate) along with the line-force parameters, considering the contribution of more than 900, 000 linetransitions. The models were computed for stars with effective temperatures above 32, 000 K and surface gravitieshigher than 3.4 dex, also considering different metallicities. We compare the synthetic line profiles obtained fromour hydrodynamic solutions using the code FASTWIND, with observed O stellar spectra. We show that thecomputed line profiles fits quite well the observations when appropriate clumping factors are taken into account.