
arXiv: astro-ph/0106085
It is argued that the abundances of r-process related elements in stars with -3100 solar masses) stars that are formed from Big Bang debris and are distinct from SNII, and two types of SNII, the H and L events, which can occur only at [Fe/H]>-3. The H events are of high frequency and produce dominantly heavy (A>130) r-elements but no Fe (presumably leaving behind black holes). The L events are of low frequency and produce Fe and dominantly light (A<130) r-elements (essentially none above Ba). By using the observed abundances in two ultra-metal-poor stars and the solar r-abundances, the initial or prompt inventory of elements produced by the first generations of very massive stars and the yields of H and L events can be determined. The abundances of a large number of elements in a star can then be calculated from the model by using only the observed Eu and Fe abundances. To match the model results and the observational data for stars with -3
47 pages, 19 figures, to appear in ApJ
Galaxy: evolution, stars: abundances, Astrophysics (astro-ph), FOS: Physical sciences, stars: Population II, Astrophysics, 530, 520
Galaxy: evolution, stars: abundances, Astrophysics (astro-ph), FOS: Physical sciences, stars: Population II, Astrophysics, 530, 520
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