Physics
Scientific paper
Aug 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006iaujd...5e..11k&link_type=abstract
Calibrating the Top of the Stellar M-L Relation, 26th meeting of the IAU, Joint Discussion 5, 16 August 2006, Prague, Czech Repu
Physics
Scientific paper
We study the influence of shock X-ray emission on the structure of NLTE wind models of O stars. For this purpose we use our own NLTE wind code with an artificial X-ray source to understand the influence of X-rays on the wind ionization structure and, consequently, on the basic wind parameters of O stars (mass-loss rate and the terminal velocity). The inclusion of X-ray sources into wind models enables to obtain wind ionization structure which is more consistent with the observed one. However, the presence of strong X-ray radiation does not significantly influence the mass-loss rate, but it may influence the terminal velocity for cooler O stars. Wind models with constant X-ray filling factor are able to roughly explain the observed relation between the X-ray luminosity and the total luminosity. Star exhibiting so-called "weak wind problem" produce X-rays apparently more efficiently than the "normal" stars. We discuss the implications of wind models with X-ray emission on the current problems of hot star wind research, namely the discrepancy between wind properties derived from observation and theoretical wind models.
Krticka Jiri
Kubát Jiri
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