A near field cosmology study of heavy elements in very metal-poor stars

被引：0

作者：

Hansen, C. J. ^{[1
]}

机构：

[1] ZAH, D-69117 Heidelberg, Germany

来源：

FIRST STARS IV - FROM HAYASHI TO THE FUTURE | 2012年 / 1480卷

关键词：

Stars; abundances; chemical evolution; supernova; nucleosynthesis; CORE-COLLAPSE SUPERNOVAE; HORIZONTAL-BRANCH STARS; NEUTRON-CAPTURE; CROSS-SECTIONS; NUCLEOSYNTHESIS; TELESCOPE; EVOLUTION;

D O I：

10.1063/1.4754346

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Studying a range of old metal-poor stars provides information over cosmological timescales of our Galaxy. Such studies are indicative of the pristine gases and evolution of the Milky Way. Deriving stellar parameters and abundances from high-resolution observations of stars at various stellar evolution stages (including old dwarfs and RR Lyrae), allows us to use these abundances as tracers of an even earlier progenitor population. Here, we carry out a detailed abundance study of mainly heavy elements (Z > 38), i.e. neutron-capture elements, which we at low metallicities ([Fe/H] < -2.5) take as pure supernova type II products. A comparison of the derived abundances to type II supernova yields of heavy elements provides knowledge of the old stellar generations as well as properties of neutron-capture formation sites.

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页码：151 / 155

页数：5

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