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
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| 刊名 | SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
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| 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 |
| 推荐引用方式 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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