Effective screening due to minihalos during the epoch of reionization

被引：57

作者：

Barkana, R ^{[1
]}

Loeb, A

机构：

[1] Tel Aviv Univ, Sch Phys & Astron, IL-69978 Tel Aviv, Israel

[2] Harvard Univ, Dept Astron, Cambridge, MA 02138 USA

来源：

ASTROPHYSICAL JOURNAL | 2002年 / 578卷 / 01期

关键词：

cosmology : theory; galaxies : formation; galaxies : high-redshift;

D O I：

10.1086/342313

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We show that the gaseous halos of collapsed objects introduce a substantial cumulative opacity to ionizing radiation, even after the smoothly distributed hydrogen in the intergalactic medium has been fully reionized. This opacity causes a delay of Deltazgreater than or similar to1 in redshift between the time of the overlap of ionized bubbles in the intergalactic medium and the lifting of complete Gunn-Peterson Lyalpha absorption. The minihalos responsible for this screening effect are not resolved by existing numerical simulations of reionization.

引用

页码：1 / 11

页数：11

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