The winds of hot massive first stars

Jiri Krticka, Jiri Kubat

Masaryk University, Brno, Czech Republic
Astronomical Institute, Ondrejov, Czech Republic

We study dynamical aspects of circumstellar environment around massive zero-metallicity first stars. For this purpose we apply our NLTE wind models. We show that the hydrogen-helium stellar wind from stationary massive first generation (Population III) stars (driven either by the line (bound-bound) or continuum (bound-free and free-free) transitions) is unlikely. The possibility of expulsion of chemically homogeneous wind and the role of minor isotopes are also discussed. Finally, we estimate the importance of hydrogen and helium lines for shutting off the initial accretion onto first stars and its influence on initial mass function of first stars.

Reference: Accepted for publication in Astronomy & Astrophysics
Status: Manuscript has been accepted