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Cai, RG; Ma, YZ; Tang, B; Tuo, ZL; Cai, RG (reprint author), Chinese Acad Sci, Inst Theoret Phys, Key Lab Frontiers Theoret Phys, POB 2735, Beijing 100190, Peoples R China.
Constraining the anisotropic expansion of the Universe
Source PublicationPHYSICAL REVIEW D
Language英语
KeywordProbe Wmap Observations Hubble Diagram Supernova Cosmology
AbstractWe study the possibly existing anisotropy in the accelerating expansion Universe with the Union2 type Ia supernovae data and gamma-ray burst data. We construct a direction-dependent dark energy model and constrain the anisotropy direction and strength of modulation. We find that the maximum anisotropic deviation direction is (l, b) = (126 degrees, 13 degrees) [or, equivalently, (l, b) = (306 degrees, -13 degrees)], and the current anisotropy level is g(0) = 0.030(+0.010)(-0.030) (1 sigma confidence level with Union2 data). Our results do not show strong evidence for the anisotropic dark energy model. We also discuss potential methods that may distinguish the peculiar velocity field from the anisotropic dark energy model.
2013
ISSN1550-7998
Volume87Issue:12Pages:123522
Subject AreaPhysics
Indexed BySCI
Funding OrganizationNational Natural Science Foundation of China [10821504, 10975168, 11035008]; Ministry of Science and Technology of China [2010CB833004]; John Templeton Foundation; National Astronomical Observatories of Chinese Academy of Sciences ; National Natural Science Foundation of China [10821504, 10975168, 11035008]; Ministry of Science and Technology of China [2010CB833004]; John Templeton Foundation; National Astronomical Observatories of Chinese Academy of Sciences ; National Natural Science Foundation of China [10821504, 10975168, 11035008]; Ministry of Science and Technology of China [2010CB833004]; John Templeton Foundation; National Astronomical Observatories of Chinese Academy of Sciences ; National Natural Science Foundation of China [10821504, 10975168, 11035008]; Ministry of Science and Technology of China [2010CB833004]; John Templeton Foundation; National Astronomical Observatories of Chinese Academy of Sciences
Citation statistics
Cited Times:45[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/15344
Collection理论物理所科研产出_SCI论文
Corresponding AuthorCai, RG (reprint author), Chinese Acad Sci, Inst Theoret Phys, Key Lab Frontiers Theoret Phys, POB 2735, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Cai, RG,Ma, YZ,Tang, B,et al. Constraining the anisotropic expansion of the Universe[J]. PHYSICAL REVIEW D,2013,87(12):123522.
APA Cai, RG,Ma, YZ,Tang, B,Tuo, ZL,&Cai, RG .(2013).Constraining the anisotropic expansion of the Universe.PHYSICAL REVIEW D,87(12),123522.
MLA Cai, RG,et al."Constraining the anisotropic expansion of the Universe".PHYSICAL REVIEW D 87.12(2013):123522.
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