Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...20915025c&link_type=abstract
2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #150.25; Bulletin of the American Astronomical Society,
Astronomy and Astrophysics
Astronomy
Scientific paper
The first generation of stars, which formed from the pristine, metal free gas produced by the Big Bang, are the first objects to enrich this gas through their explosive deaths. By following the evolution of such stars in one dimension we have some understanding of their composition prior to their explosion as supernovae, but one-dimensional models cannot capture the Raleigh-Taylor induced mixing that enriches the outer layers of the star. When zero-metallicity stars less than about 100 solar masses explode as supernovae, some portion of the star falls back onto the black hole, while the rest escapes to enrich the next generation of stars. The composition of the escaped gas will depend on how much mixing occurred between the compositional layers of the star. We present multidimensional simulations of zero-metallicity stars in the last stages of their life, and estimate their resulting nucleosynthetic output. This output may be reflected in abundances observed in very metal poor stars the Galactic halo.
Church Candace M.
Heger Alexander
Woosley Stan
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