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Hu, B; Hu, JW; Guo, ZK; Cai, RG; Hu, B (reprint author), Leiden Univ, Inst Lorentz Theoret Phys, NL-2333 CA Leiden, Netherlands.
Reconstruction of the primordial power spectra with Planck and BICEP2 data
Source PublicationPHYSICAL REVIEW D
Language英语
KeywordMicrowave Background Anisotropies South-pole Telescope Damping Tail Wmap
AbstractBy using the cubic spline interpolation method, we reconstruct the shape of the primordial scalar and tensor power spectra from the recently released Planck temperature and BICEP2 polarization cosmic microwave background data. We find that the vanishing scalar index running (dn(s)= d ln k) model is strongly disfavored at more than 3 sigma confidence level on the k = 0.0002 Mpc(-1) scale. Furthermore, the power-law parametrization gives a blue-tilt tensor spectrum, no matter using only the first five bandpowers n(t) = 1.20(-0.64)(+0.56) (95% C.L.) or the full nine bandpowers nt 1.24(-0.58)(+0.51) (95% C.L.) of BICEP2 data sets. Unlike the large tensor-to-scalar ratio value (r similar to 0.20) under the scale-invariant tensor spectrum assumption, our interpolation approach gives r(0.002) < 0.060 (95% C.L.) by using the first five bandpowers of BICEP2 data. After comparing the results with/without BICEP2 data, we find that Planck temperature with small tensor amplitude signals and BICEP2 polarization data with large tensor amplitude signals dominate the tensor spectrum reconstruction on the large and small scales, respectively. Hence, the resulting blue tensor tilt actually reflects the tension between Planck and BICEP2 data.
2014
ISSN1550-7998
Volume90Issue:2Pages:23544
Subject AreaPhysics
DOI10.1103/PhysRevD.90.023544
Indexed BySCI
Funding OrganizationDutch Foundation for Fundamental Research on Matter (FOM); Knowledge Innovation Program of Chinese Academy of Science; NSFC [11175225, 11335012]; National Basic Research Program of China [2010CB832805, 2010CB833004]; Strategic Priority Research Program "The Emergence of Cosmological Structures" of the Chinese Academy of Sciences [XDB09000000] ; Dutch Foundation for Fundamental Research on Matter (FOM); Knowledge Innovation Program of Chinese Academy of Science; NSFC [11175225, 11335012]; National Basic Research Program of China [2010CB832805, 2010CB833004]; Strategic Priority Research Program "The Emergence of Cosmological Structures" of the Chinese Academy of Sciences [XDB09000000] ; Dutch Foundation for Fundamental Research on Matter (FOM); Knowledge Innovation Program of Chinese Academy of Science; NSFC [11175225, 11335012]; National Basic Research Program of China [2010CB832805, 2010CB833004]; Strategic Priority Research Program "The Emergence of Cosmological Structures" of the Chinese Academy of Sciences [XDB09000000] ; Dutch Foundation for Fundamental Research on Matter (FOM); Knowledge Innovation Program of Chinese Academy of Science; NSFC [11175225, 11335012]; National Basic Research Program of China [2010CB832805, 2010CB833004]; Strategic Priority Research Program "The Emergence of Cosmological Structures" of the Chinese Academy of Sciences [XDB09000000]
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Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/15701
Collection理论物理所科研产出_SCI论文
Corresponding AuthorHu, B (reprint author), Leiden Univ, Inst Lorentz Theoret Phys, NL-2333 CA Leiden, Netherlands.
Recommended Citation
GB/T 7714
Hu, B,Hu, JW,Guo, ZK,et al. Reconstruction of the primordial power spectra with Planck and BICEP2 data[J]. PHYSICAL REVIEW D,2014,90(2):23544.
APA Hu, B,Hu, JW,Guo, ZK,Cai, RG,&Hu, B .(2014).Reconstruction of the primordial power spectra with Planck and BICEP2 data.PHYSICAL REVIEW D,90(2),23544.
MLA Hu, B,et al."Reconstruction of the primordial power spectra with Planck and BICEP2 data".PHYSICAL REVIEW D 90.2(2014):23544.
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