Strange mode instabilities and mass-loss in evolved massive primordial stars
| Autor: | Yadav, Abhay Pratap, Biavatti, Stefan Henrique Kühnrich, Glatzel, Wolfgang |
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| Rok vydání: | 2018 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | 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$_{\rm{eff}}$ = 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 $\times$ 10$^{-7}$ and 3.5 $\times$ 10$^{-4}$ M$_{\odot}$ yr$^{-1}$. Comment: 11 pages, 14 figures, 1 table, Accepted for publication in MNRAS |
| Databáze: | arXiv |
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