The Peculiar Evolution of Low-Mass Pop III Stars
We have followed the evolution of low-mass, initially metal-free stars from the zero-age main sequence to the late AGB under the assumption of pollution with external, metal-rich material and in the presence of diffusion. We identify conditions under which helium-flash induced mixing between the envelope and carbonrich layers occurs and compare the resulting surface abundances and post-flash stellar parameters with those of observed extremely metal-poor stars.
KeywordsBurning Convection Helium Settling Wharf
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- Schlattl, H., Cassisi, S., Weiss, A., & Salaris, M. 2001, ApJ (submitted).Google Scholar