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

2018/01/15 by Yadav, Abhay Pratap, Biavatti, Stefan Henrique Kühnrich, Glatzel, Wolfgang
#FOS: Physical sciences #Solar and Stellar Astrophysics (astro-ph.SR)

paper · doi:10.48550/arxiv.1801.04890

Abstract

A linear stability analysis of models for evolved primordial stars with masses between 150 and 250 M_\odot is presented. Strange mode instabilities with growth rates in the dynamical range are identified for stellar models with effective temperatures below log T_\rmeff = 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_\odot yr^-1.

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