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题名: Reconstruction of the primordial power spectra with Planck and BICEP2 data
作者: Hu, B ;  Hu, JW ;  Guo, ZK ;  Cai, RG
刊名: PHYSICAL REVIEW D
出版日期: 2014
卷号: 90, 期号:2, 页码:23544
关键词: MICROWAVE BACKGROUND ANISOTROPIES ;  SOUTH-POLE TELESCOPE ;  DAMPING TAIL ;  WMAP
学科分类: Physics
DOI: 10.1103/PhysRevD.90.023544
通讯作者: Hu, B (reprint author), Leiden Univ, Inst Lorentz Theoret Phys, NL-2333 CA Leiden, Netherlands.
部门归属: [Hu, Bin] Leiden Univ, Inst Lorentz Theoret Phys, NL-2333 CA Leiden, Netherlands ;  [Hu, Jian-Wei ;  Guo, Zong-Kuan ;  Cai, Rong-Gen] Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China ;  [Cai, Rong-Gen] King Abdulaziz Univ, Jeddah 21589, Saudi Arabia
英文摘要: By 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.
资助者: 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]
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000339977300002
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/15701
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Recommended Citation:
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.
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