Knowledge Management System of Institute of Theoretical Physics, CAS
Gao, X; Gao, X (reprint author), Chinese Acad Sci, Inst Theoret Phys, Key Lab Frontiers Theoret Phys, 55 Zhong Guan Cun E Rd, Beijing 100080, Peoples R China. | |
Can relic superhorizon inhomogeneities be responsible for large-scale CMB anomalies? | |
发表期刊 | PHYSICS LETTERS B
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语种 | 英语 |
关键词 | Chaotic Inflationary Universe Initial Conditions Anisotropy Perturbations |
摘要 | We investigate the effects of the presence of relic classical superhorizon inhomogeneities during inflation. This superhorizon inhomogeneity appears as a gradient locally and picks out a preferred direction. Quantum fluctuations on this slightly inhomogeneous background are generally statistical anisotropic. We find a quadrupole modification to the ordinary isotropic spectrum. Moreover, this deviation from statistical isotropy is scale-dependent, with a similar to -1/k(2) factor. This result implies that the statistical anisotropy mainly appears on large scales, while the spectrum on small scales remains highly isotropic. Moreover, due to this -1/k(2) factor, the power on large scales is suppressed. Thus, our model can simultaneously explain the observed anisotropic alignments of the low-l multipoles and their low power. (C) 2011 Elsevier B.V All rights reserved. |
2011 | |
ISSN | 0370-2693 |
卷号 | 702期号:1页码:12-15 |
学科领域 | Physics |
收录类别 | SCI |
项目资助者 | NSFC ; NSFC ; NSFC ; NSFC |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.itp.ac.cn/handle/311006/14296 |
专题 | 理论物理所科研产出_SCI论文 |
通讯作者 | Gao, X (reprint author), Chinese Acad Sci, Inst Theoret Phys, Key Lab Frontiers Theoret Phys, 55 Zhong Guan Cun E Rd, Beijing 100080, Peoples R China. |
推荐引用方式 GB/T 7714 | Gao, X,Gao, X . Can relic superhorizon inhomogeneities be responsible for large-scale CMB anomalies?[J]. PHYSICS LETTERS B,2011,702(1):12-15. |
APA | Gao, X,&Gao, X .(2011).Can relic superhorizon inhomogeneities be responsible for large-scale CMB anomalies?.PHYSICS LETTERS B,702(1),12-15. |
MLA | Gao, X,et al."Can relic superhorizon inhomogeneities be responsible for large-scale CMB anomalies?".PHYSICS LETTERS B 702.1(2011):12-15. |
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