Constraints on a decomposed dark fluid with constant adiabatic sound speed by jointing the geometry test and growth rate after Planck data
文献类型：期刊论文
| 作者 | Yang, Weiqiang1; Xu, Lixin1,2; Wang, Yuting3 ; Wu, Yabo4
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| 刊名 | PHYSICAL REVIEW D
 |
| 出版日期 | 2014-02-20 |
| 卷号 | 89期号:4 |
| 英文摘要 | In this paper, a unified dark fluid with constant adiabatic sound speed is decomposed into cold dark matter interacting with vacuum energy. Based on a Markov-chain Monte Carlo method, we constrain this model by jointing the geometry and dynamical measurement. The geometry test includes cosmic microwave background radiation from Planck, baryon acoustic oscillation, and type-Ia supernovae; the dynamic measurement is f sigma(8)(z) data points, which is obtained from the growth rate via redshift space distortion, and sigma(8)(z) is the root-mean-square amplitude of the density contrast delta at the comoving 8h(-1) Mpc scale. The jointed constraint shows that alpha = 0.000662(-0.000662)(+0.000173) and alpha = 0.824(-0.0166)(+0.0128). The CMB and matter power spectra are both similar for the case of alpha = mean value and that of alpha = 0. However, the evolutionary curves of f sigma(8)(z) are different. This means that, to some extent, the data points of the growth rate could break the degeneracy of the dark energy models. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000332170600002 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/6606]  |
| 专题 | 国家天文台_射电天文研究部 |
| 作者单位 | 1.Dalian Univ Technol, Sch Phys & Optoelect Technol, Inst Theoret Phys, Dalian 116024, Peoples R China 2.Dalian Univ Technol, Coll Adv Sci & Technol, Dalian 116024, Peoples R China 3.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 4.Liaoning Normal Univ, Dept Phys, Dalian 116029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang, Weiqiang,Xu, Lixin,Wang, Yuting,et al. Constraints on a decomposed dark fluid with constant adiabatic sound speed by jointing the geometry test and growth rate after Planck data[J]. PHYSICAL REVIEW D,2014,89(4). |
| APA | Yang, Weiqiang,Xu, Lixin,Wang, Yuting,&Wu, Yabo.(2014).Constraints on a decomposed dark fluid with constant adiabatic sound speed by jointing the geometry test and growth rate after Planck data.PHYSICAL REVIEW D,89(4). |
| MLA | Yang, Weiqiang,et al."Constraints on a decomposed dark fluid with constant adiabatic sound speed by jointing the geometry test and growth rate after Planck data".PHYSICAL REVIEW D 89.4(2014). |
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来源：国家天文台
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