Strange mode instabilities and mass-loss in evolved massive primordial stars

الأصل · EN

A linear stability analysis of models for evolved primordial stars with masses between 150 and 250 M is presented. Strange mode instabilities with growth rates in the dynamical range are identified for stellar models with effective temperatures below log Teff = 4.5. For selected models the final fate of the instabilities is determined by numerical simulation of their evolution into the non-linear regime. As a result, the instabilities lead to finite amplitude pulsations. Associated with them are acoustic energy fluxes capable of driving stellar winds with mass-loss rates in the range between 7.7 × 10⁻⁷ and 3.5 × 10⁻⁴ M yr⁻¹.