Connecting the primordial and Galactic deuterium abundances

被引：40

作者：

Steigman, Gary

Romano, Donatella

Tosi, Monica

机构：

[1] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA

[2] Ohio State Univ, Dept Astron, Columbus, OH 43210 USA

[3] Osservatorio Astron Bologna, INAF, I-40127 Bologna, Italy

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2007年 / 378卷 / 02期

关键词：

ISM : abundances; Galaxy : evolution;

D O I：

10.1111/j.1365-2966.2007.11780.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The deuterium abundances inferred from observations of the interstellar medium (ISM) within 1-2 kpc of the Sun range over a factor of 3 and the corresponding oxygen abundances show an even larger dispersion. While the lower D (and O) abundances likely result from depletion on to dust, the higher D abundances are consistent with the big bang nucleosynthesis-predicted primordial D abundance and chemical evolution models of the Galaxy with infall of primordial or nearly primordial material. The large ranges in deuterium and oxygen abundances suggest that the effects of depletion and/or infall have not been homogenized in the local ISM.

引用

页码：576 / 580

页数：5

共 40 条

[1] The homogeneity of interstellar oxygen in the galactic disk [J].