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Guo, ZK; Zhang, YZ; Guo, ZK (reprint author), Chinese Acad Sci, State Key Lab Theoret Phys, Inst Theoret Phys, POB 2735, Beijing 100190, Peoples R China.
Primordial power spectrum versus extension parameters beyond the standard model
发表期刊PHYSICAL REVIEW D
语种英语
关键词Observations Cosmological Interpretation Wmap Data Anisotropy Telescope Reconstruction Oscillations Inflation Universe
摘要We reconstruct the shape of the primordial power spectrum of curvature perturbations in extended cosmological models, including addition of massive neutrinos, extra relativistic species, or varying primordial helium abundance, from the latest cosmic microwave background data from the Wilkinson Microwave Anisotropy Probe, the Atacama Cosmology Telescope, and the South Pole Telescope. We find that a scale-invariant primordial spectrum is disfavored by the data at 95% confidence level even in the presence of massive neutrinos, however it can lie within the 95% confidence region if the effective number of relativistic species or the primordial helium abundance is allowed to vary freely. The constraints on the extension parameters from WMAP7 + ACT + H-0 + BAO are the total mass of neutrinos Sigma m(p) < 0.48 eV (95% C.L.), the effective number of relativistic species N-eff 4.50 +/- 0.81, and the primordial helium abundance Y-p 0.303 +/- 0.075. The constraints from WMAP7 + SPT + H-0 + BAO are Sigma m(p) < 0.45 eV (95% C.L.), N-eff 3.86 +/- 0.63, and Y-p 0.277 +/- 0.050.
2012
ISSN1550-7998
卷号85期号:10页码:103519
学科领域Physics
收录类别SCI
项目资助者Chinese Academy of Science; NSFC [11175225]; National Basic Research Program of China [2010CB832805] ; Chinese Academy of Science; NSFC [11175225]; National Basic Research Program of China [2010CB832805] ; Chinese Academy of Science; NSFC [11175225]; National Basic Research Program of China [2010CB832805] ; Chinese Academy of Science; NSFC [11175225]; National Basic Research Program of China [2010CB832805]
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被引频次:7[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/15100
专题理论物理所科研产出_SCI论文
通讯作者Guo, ZK (reprint author), Chinese Acad Sci, State Key Lab Theoret Phys, Inst Theoret Phys, POB 2735, Beijing 100190, Peoples R China.
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Guo, ZK,Zhang, YZ,Guo, ZK . Primordial power spectrum versus extension parameters beyond the standard model[J]. PHYSICAL REVIEW D,2012,85(10):103519.
APA Guo, ZK,Zhang, YZ,&Guo, ZK .(2012).Primordial power spectrum versus extension parameters beyond the standard model.PHYSICAL REVIEW D,85(10),103519.
MLA Guo, ZK,et al."Primordial power spectrum versus extension parameters beyond the standard model".PHYSICAL REVIEW D 85.10(2012):103519.
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