Savaglio2006 用伽玛暴作为宇宙化学演化的探针 3

主要内容:
高红移的星系也不是贫金属的, 至少GRB周围的ISM金属丰度可达1个太阳质量. 可以通过不同红移处宿主星系的化学元素丰度探测宇宙化学演化.

本文是一篇综述文章.

精彩摘抄:
Contents
1. Introduction 2
2. Chemical enrichment in GRB environments: the GRB-DLAs 3
3. Dust properties 5
3.1. Dust-depletion patterns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.2. Dust extinction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4. GRB-DLA metallicities and redshift evolution 11
4.1. The ! elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5. GRB host metallicities 14
6. Fine structure 18
7. Possible systematic effects 18
7.1. A testbed for the COG: the low-mass high-z starforming galaxy cB58. . . . . . 18
7.2. Wrong assumption on the dust content . . . . . . . . . . . . . . . . . . . . . . 19
7.3. Wrong assumption on the ionization correction. . . . . . . . . . . . . . . . . . 20
7.4. Possible presence of molecular hydrogen . . . . . . . . . . . . . . . . . . . . . 20
8. Discussion 21
Acknowledgments 23
References 23

文章信息:

astro-ph/0609489 [abs, pdf] :

Title: GRBs as Cosmological Probes - Cosmic Chemical Evolution
Authors: S. Savaglio (MPE)
Comments: Review article to be published in New Journal of Physics (this http URL), Focus Issue on Gamma Ray Bursts