中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Cosmological parameter fittings with the BICEP2 data

文献类型:期刊论文

作者Wu FengQuan1; Li YiChao1,2; Lu YouJun1; Chen XueLei1,3
刊名SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
出版日期2014-08-01
卷号57期号:8页码:1449-1454
关键词BICEP2 B-mode inflation
英文摘要Combining the latest Planck, Wilkinson Microwave Anisotropy Probe (WMAP), and baryon acoustic oscillation (BAO) data, we exploit the recent cosmic microwave background (CMB) B-mode power spectra data released by the BICEP2 collaboration to constrain the cosmological parameters of the ACDM model, especially the primordial power spectra parameters of the scalar and the tensor modes, n(s), alpha(s), r, n(t). We obtain constraints on the parameters for a lend ole, ACDM model using the Markov Chain Monte Carlo (MCMC) technique, the marginalized 68% bounds are r = 0.1043(-0.0914)(+0.0307), n(s) = 0.9617(-0.0061)(+0.0061), alpha(s) = -0.0175(-0.0097)(+0.0105), n(t) = 0.5198(-0.4579)(+0.4515). We find that a blue tilt for nt is favored slightly, but it is still well consistent with flat or even red tilt. Our r value is slightly smaller than the one obtained by the BICEP group, in that we permit nt as a free parameter without imposing the single-field slow roll inflation consistency relation. When we impose this relation, then r = 0.2130(-0.0609)(+0.0446) For most other parameters, the best fit values and measurement errors are not altered significantly by the introduction of the BICEP2 data.
收录类别SCI
语种英语
WOS记录号WOS:000339365800005
源URL[http://ir.bao.ac.cn/handle/114a11/6581]  
专题国家天文台_星系宇宙学研究部
作者单位1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China
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GB/T 7714
Wu FengQuan,Li YiChao,Lu YouJun,et al. Cosmological parameter fittings with the BICEP2 data[J]. SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,2014,57(8):1449-1454.
APA Wu FengQuan,Li YiChao,Lu YouJun,&Chen XueLei.(2014).Cosmological parameter fittings with the BICEP2 data.SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,57(8),1449-1454.
MLA Wu FengQuan,et al."Cosmological parameter fittings with the BICEP2 data".SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY 57.8(2014):1449-1454.

入库方式: OAI收割

来源:国家天文台

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