New Insights into the Early Stage of the Galactic Chemical Evolution
The Astrophysical Journal1998Vol. 508(2), pp. L151–L154
Citations Over TimeTop 10% of 1998 papers
Abstract
The supernova yields of several heavy elements, including α-, iron-group, and r-process elements, are obtained as a function of the mass of their progenitor main-sequence stars Mms from the abundance patterns of extremely metal-poor stars with a procedure recently proposed by Shigeyama & Tsujimoto. The ejected masses of α- and iron-group elements increase with Mms, whereas more Eu is ejected from supernovae with lower Mms. For these several heavy elements, it is shown that the average abundance ratios that are weighted by the Salpeter initial mass function coincide with the ratios observed in stars with -2 -2, results from the mixing of the products from a whole site of the nucleosynthesis, taking place on a timescale longer than 109 yr.
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