Principal component analysis of the reionization history from Planck 2015 data

doi:http://dx.doi.org/10.1103/PhysRevD.92.123521

ITP OpenIR > 理论物理所2015年知识产出

	Principal component analysis of the reionization history from Planck 2015 data
	Dai, WM; Guo, ZK; Cai, RG; Dai, WM (reprint author), Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, POB 2735, Beijing 100190, Peoples R China.
	2015
发表期刊	PHYSICAL REVIEW D
卷号	92 期号:12 页码:123521
文章类型	Article
摘要	The simple assumption of an instantaneous reionization of the Universe may bias estimates of cosmological parameters. In this paper a model-independent principal component method for the reionization history is applied to give constraints on the cosmological parameters from recent Planck 2015 data. We find that the Universe is not completely reionized at redshifts z >= 8.5 at 95% C.L. Both the reionization optical depth and matter fluctuation amplitude are higher than but consistent with those obtained in the standard instantaneous reionization scheme. The high estimated value of the matter fluctuation amplitude strengthens the tension between Planck cosmic microwave background observations and some astrophysical data, such as cluster counts and weak lensing. The tension can be significantly relieved if the neutrino masses are allowed to vary. Thanks to a high scalar spectral index, the low-scale spontaneously broken supersymmetry inflationary model can fit the data well, which is marginally disfavored at 95% C.L. in the Planck analysis.
学科领域	Astronomy & Astrophysics ; Physics
资助者	National Natural Science Foundation of China [11175225, 11335012] ; National Natural Science Foundation of China [11175225, 11335012] ; Strategic Priority Research Program of the Chinese Academy of Sciences [XDB09000000] ; Strategic Priority Research Program of the Chinese Academy of Sciences [XDB09000000] ; National Natural Science Foundation of China [11175225, 11335012] ; National Natural Science Foundation of China [11175225, 11335012] ; Strategic Priority Research Program of the Chinese Academy of Sciences [XDB09000000] ; Strategic Priority Research Program of the Chinese Academy of Sciences [XDB09000000]
DOI	http://dx.doi.org/10.1103/PhysRevD.92.123521
关键词[WOS]	MICROWAVE BACKGROUND ANISOTROPIES ; POLARIZATION ; CONSTRAINTS ; UNIVERSE ; MODELS
收录类别	SCI
语种	英语
资助者	National Natural Science Foundation of China [11175225, 11335012] ; National Natural Science Foundation of China [11175225, 11335012] ; Strategic Priority Research Program of the Chinese Academy of Sciences [XDB09000000] ; Strategic Priority Research Program of the Chinese Academy of Sciences [XDB09000000] ; National Natural Science Foundation of China [11175225, 11335012] ; National Natural Science Foundation of China [11175225, 11335012] ; Strategic Priority Research Program of the Chinese Academy of Sciences [XDB09000000] ; Strategic Priority Research Program of the Chinese Academy of Sciences [XDB09000000]
WOS类目	Astronomy & Astrophysics ; Physics, Particles & Fields
引用统计
文献类型	期刊论文
条目标识符	http://ir.itp.ac.cn/handle/311006/20748
专题	理论物理所2015年知识产出
通讯作者	Dai, WM (reprint author), Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, POB 2735, Beijing 100190, Peoples R China.
推荐引用方式 GB/T 7714	Dai, WM,Guo, ZK,Cai, RG,et al. Principal component analysis of the reionization history from Planck 2015 data[J]. PHYSICAL REVIEW D,2015,92(12):123521.
APA	Dai, WM,Guo, ZK,Cai, RG,&Dai, WM .(2015).Principal component analysis of the reionization history from Planck 2015 data.PHYSICAL REVIEW D,92(12),123521.
MLA	Dai, WM,et al."Principal component analysis of the reionization history from Planck 2015 data".PHYSICAL REVIEW D 92.12(2015):123521.

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