Early reionization by cosmic strings reexamined

被引：17
|
作者：
Pogosian, L [1 ]
Vilenkin, A [1 ]
机构：
[1] Tufts Univ, Dept Phys & Astron, Inst Cosmol, Medford, MA 02155 USA
来源：
PHYSICAL REVIEW D | 2004年 / 70卷 / 06期
关键词：
D O I：
10.1103/PhysRevD.70.063523
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Measurements of the Cosmic Microwave Background (CMB) temperature anisotropy and the temperature-polarization cross correlation by Wilkinson Microwave Anistropy Probe (WMAP) suggest a reionization redshift of zsimilar to17+/-5. On the other hand, observations of high redshift galaxies indicate a presence of a significant fraction of neutral hydrogen at redshift zsimilar to6-7. We show that cosmic strings with tensions well within, but not far from, current observation bounds could cause early star formation at a level sufficient to explain the high reionization redshift.
引用
收藏
页码：063523 / 1
页数：6
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