ITP OpenIR  > SCI期刊论文
Dai, WM; Ma, YZ; Guo, ZK; Cai, RG
Constraining the reionization history with CMB and spectroscopic observations
Source PublicationPHYSICAL REVIEW D
Language英语
KeywordLY-ALPHA EMITTERS LYMAN-ALPHA NEUTRAL HYDROGEN EPOCH EVOLUTION REDSHIFT SPECTRUM UNIVERSE GALAXIES QUASAR
AbstractWe investigate the constraints on the reionization history of the Universe from a joint analysis of the cosmic microwave background and neutral hydrogen fraction data. The tanh parametrization and principal component analysis methods are applied to the reionization history respectively. The commonly used tanh parametrization is oversimplistic when the neutral hydrogen fraction data are taken into account. Using the principal component analysis method, the reconstructed reionization history is consistent with the neutral hydrogen fraction data. With the principal component analysis method, we reconstruct the neutral hydrogen fraction at z = 9.75 as x(HI) = 0.69(-0.30)(+0.32) for 6 < z < 20 range reconstruction, and x(HI) = 0.76(-0.22)(+0.27) for 6 < z < 30 range reconstruction. These results suggest that the Universe began to reionize at redshift no later than z = 10 at a 95% confidence level.
2019
ISSN2470-0010
Volume99Issue:4Pages:43524
Subject AreaAstronomy & Astrophysics ; Physics
MOST Discipline CatalogueAstronomy & Astrophysics ; Physics, Particles & Fields
DOI10.1103/PhysRevD.99.043524
Indexed BySCIE
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Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/23483
CollectionSCI期刊论文
Affiliation1.[Dai, Wei-Ming
2.Guo, Zong-Kuan
3.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, POB 2735, Beijing 100190, Peoples R China
4.[Guo, Zong-Kuan
5.Univ Chinese Acad Sci, Sch Phys Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
6.Univ KwaZulu Natal, Sch Chem & Phys, Westville Campus,Private Bag X54001, ZA-4000 Durban, South Africa
7.Univ KwaZulu Natal, NAOC UKZN Computat Astrophys Ctr NUCAC, ZA-4000 Durban, South Africa
Recommended Citation
GB/T 7714
Dai, WM,Ma, YZ,Guo, ZK,et al. Constraining the reionization history with CMB and spectroscopic observations[J]. PHYSICAL REVIEW D,2019,99(4):43524.
APA Dai, WM,Ma, YZ,Guo, ZK,&Cai, RG.(2019).Constraining the reionization history with CMB and spectroscopic observations.PHYSICAL REVIEW D,99(4),43524.
MLA Dai, WM,et al."Constraining the reionization history with CMB and spectroscopic observations".PHYSICAL REVIEW D 99.4(2019):43524.
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