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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?
Source PublicationPHYSICS LETTERS B
Language英语
KeywordChaotic Inflationary Universe Initial Conditions Anisotropy Perturbations
AbstractWe 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
ISSN0370-2693
Volume702Issue:1Pages:12-15
Subject AreaPhysics
Indexed BySCI
Funding OrganizationNSFC ; NSFC ; NSFC ; NSFC
Citation statistics
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/14296
Collection理论物理所科研产出_SCI论文
Corresponding AuthorGao, 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.
Recommended Citation
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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