Constraints on the extensions to the base ACDM model from BICEP2, Planck and WMAP

被引：23
作者：
Cheng Cheng [1 ,2 ]
Huang QingGuo [1 ]
Zhao Wen [3 ]
机构：
[1] Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100190, Peoples R China
[3] Univ Sci & Technol China, Dept Astron, Key Lab Res Galaxies & Cosmol, Hefei 230026, Peoples R China
来源：
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY | 2014年 / 57卷 / 08期
基金：
中国国家自然科学基金;
关键词：
relic gravitational waves; spectral index; dark energy; MICROWAVE BACKGROUND ANISOTROPIES; INFLATIONARY UNIVERSE; FLATNESS; HORIZON;
D O I：
10.1007/s11433-014-5514-1
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Recently Background Imaging of Cosmic Extragalactia Polarization (B2) discovered the relic gravitational waves at 7.0 sigma confidence level. However, the other cosmic microwave background (CMB) data, for example Planck data released in 2013 (P13), prefer a much smaller amplitude of the primordial gravitational waves spectrum if a power-law spectrum of adiabatic scalar perturbations is assumed in the six-parameter ACDM cosmology. In this paper, we explore whether the wCDM model and the running spectral index can relax the tension between B2 and other CMB data. Specifically we found that a positive running of running of spectral index is preferred at 1.7 sigma level from the combination of B2, P13 and WMAP Polarization data.
引用
收藏
页码：1460 / 1465
页数：6
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