Evolutionary models of zero metallicity stars
Paola Marigo, Cesare Chiosi, Leo Girardi, Tiziana Sarrubbi
Abstract
We present new evolutionary models for zero-metallicity stars, covering a large range of initial masses (from 0.8 to 100 Msun). Models are computed with overshooting from stellar cores and convective envelopes, and assuming mass-loss from the most massive stars. We discuss the main evolutionary features of these stars, and provide estimates of the amount of newly-synthesized elements dredged-up to the stellar surface, and possibly lost by stellar winds from the most massive stars. Full details of these models will be given in Marigo et al. (2000, in preparation).
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