Cosmic microwave background anisotropy induced by cosmic strings on angular scales 15'

被引：113
|
作者：
Allen, B
Caldwell, RR
Dodelson, S
Knox, L
Shellard, EPS
Stebbins, A
机构：
[1] UNIV PENN,DEPT PHYS & ASTRON,PHILADELPHIA,PA 19106
[2] NASA,FERMILAB ASTROPHYS CTR,BATAVIA,IL 60510
[3] CANADIAN INST THEORET ASTROPHYS,TORONTO,ON M5S 3H8,CANADA
[4] UNIV CAMBRIDGE,DEPT APPL MATH & THEORET PHYS,CAMBRIDGE CB3 9EW,ENGLAND
来源：
PHYSICAL REVIEW LETTERS | 1997年 / 79卷 / 14期
关键词：
D O I：
10.1103/PhysRevLett.79.2624
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We have computed an estimate of the angular power spectrum of the cosmic microwave background induced by cosmic strings on angular scales greater than or similar to 15', using a numerical simulation of a cosmic string network and have decomposed this pattern into scalar, vector, and tensor parts. The anisotropies from vector modes dominate except on very small angular scales, and we find no evidence for strong acoustic oscillations in the scalar anisotropy. The anisotropies generated after recombination are even more important than in adiabatic models. The total anisotropy on small scales is inconsistent with current measurements. The calculation has a number of uncertainties, the largest of which is due to finite temporal range.
引用
收藏
页码：2624 / 2627
页数：4
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