IS BERYLLIUM IN METAL-POOR STARS OF GALACTIC OR COSMOLOGICAL ORIGIN

被引：109

作者：

GILMORE, G

GUSTAFSSON, B

EDVARDSSON, B

NISSEN, PE

机构：

[1] ASTRON OBSERV,S-75120 UPPSALA,SWEDEN

[2] AARHUS UNIV,INST PHYS & ASTRON,DK-8000 AARHUS,DENMARK

来源：

NATURE | 1992年 / 357卷 / 6377期

关键词：

D O I：

10.1038/357379a0

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Standard Big Bang nucleosynthesis predicts a very small primordial abundance of beryllium. Observations of nine very metal-poor stars indicate a beryllium abundance roughly proportional to the oxygen abundance, a trend that can be explained in terms of galactic chemical evolution. Combining this rate of beryllium production with recent observations of boron and lithium in similar stars yields an upper limit to the primordial beryllium abundance several orders of magnitude greater than the cosmological prediction, a result that can be explained by cosmic-ray activity in the early Galaxy.

引用

页码：379 / 384

页数：6

共 31 条

[1] COSMOLOGICAL QUANTUM CHROMODYNAMICS, NEUTRON DIFFUSION, AND THE PRODUCTION OF PRIMORDIAL HEAVY-ELEMENTS [J].