Reconstruction of the primordial power spectra with Planck and BICEP2 data
文献类型：期刊论文
| 作者 | Cai, RG ; Guo, ZK
|
| 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 |
| ISSN号 | 1550-7998 |
| 通讯作者 | Hu, B (reprint author), Leiden Univ, Inst Lorentz Theoret Phys, NL-2333 CA Leiden, Netherlands. |
| 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. |
| 学科主题 | Physics |
| 收录类别 | SCI |
| 资助信息 | 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] |
| 原文出处 | http://dx.doi.org/10.1103/PhysRevD.90.023544 |
| 语种 | 英语 |
| WOS记录号 | WOS:000339977300002 |
| 公开日期 | 2015-06-03 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/15701]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 推荐引用方式 GB/T 7714 | Cai, RG,Guo, ZK. Reconstruction of the primordial power spectra with Planck and BICEP2 data[J]. PHYSICAL REVIEW D,2014,90(2):23544. |
| APA | Cai, RG,&Guo, ZK.(2014).Reconstruction of the primordial power spectra with Planck and BICEP2 data.PHYSICAL REVIEW D,90(2),23544. |
| MLA | Cai, RG,et al."Reconstruction of the primordial power spectra with Planck and BICEP2 data".PHYSICAL REVIEW D 90.2(2014):23544. |
入库方式： OAI收割
来源：理论物理研究所
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