EVOLUTION OF BERYLLIUM ABUNDANCES IN THE GALACTIC HALO

被引：95

作者：

RYAN, SG

NORRIS, JE

BESSELL, MS

DELIYANNIS, CP

机构：

[1] UNIV VICTORIA,DEPT PHYS & ASTON,VICTORIA V8W 3P6,BC,CANADA

[2] AUSTRALIAN NATL UNIV,MT STROMLO & SIDING SPRING OBSERV,CANBERRA,ACT 2611,AUSTRALIA

[3] YALE UNIV,DEPT ASTRON,NEW HAVEN,CT 06511

来源：

ASTROPHYSICAL JOURNAL | 1992年 / 388卷 / 01期

关键词：

NUCLEAR REACTIONS; NUCLEOSYNTHESIS; ABUNDANCES; STARS; POPULATION-II;

D O I：

10.1086/171141

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have used a spectrum synthesis code to measure Be abundances for three halo stars and an upper limit for a fourth. The abundances are discussed considering models for Galactic and primordial synthesis of Be. Computations for inhomogeneous big bang models range over two orders of magnitude, and we can at best place upper limits on possible primordial nucleosynthesis. We compute a new model for the evolution of Be abundances in the halo, using constraints imposed by its overall metallicity distribution. Observations of stars of [Fe/H] approximately -2.0 are required to clarify the enrichment history of this element.

引用

页码：184 / 189

页数：6

共 47 条

[41] CARBON AND NITROGEN ABUNDANCES IN METAL-POOR STARS [J].