Fables of reconstruction: controlling bias in the dark energy equation of state
文献类型：期刊论文
| 作者 | Crittenden, RG ; Zhao, GB ; Pogosian, L ; Samushia, L ; Zhang, XM |
| 刊名 | JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
 |
| 出版日期 | 2012 |
| 期号 | 2 |
| 关键词 | PROBE WMAP OBSERVATIONS EXPANSION HISTORY UNIVERSE REDSHIFT SUPERNOVA CONSTRAINTS QUINTOM AGE |
| ISSN号 | 1475-7516 |
| 通讯作者 | Crittenden, RG: Univ Portsmouth, Inst Cosmol & Gravitat, Portsmouth PO1 3FX, Hants, England. |
| 中文摘要 | We develop an efficient, non-parametric Bayesian method for reconstructing the time evolution of the dark energy equation of state w(z) from observational data. Of particular importance is the choice of prior, which must be chosen carefully to minimise variance and bias in the reconstruction. Using a principal component analysis, we show how a correlated prior can be used to create a smooth reconstruction and also avoid bias in the mean behaviour of w(z). We test our method using Wiener reconstructions based on Fisher matrix projections, and also against more realistic MCMC analyses of simulated data sets for Planck and a future space-based dark energy mission. While the accuracy of our reconstruction depends on the smoothness of the assumed w(z), the relative error for typical dark energy models is less than or similar to 10% out to redshift z = 1.5 |
| 收录类别 | SCI |
| 资助信息 | STFC [ST/H002774/1]; NSERC; European Research Council; National Natural Science Foundation of China [11033005, 10803001, 10975142]; 973 program [2010CB833000] |
| 语种 | 英语 |
| 公开日期 | 2013-09-17 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/37861]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Crittenden, RG,Zhao, GB,Pogosian, L,et al. Fables of reconstruction: controlling bias in the dark energy equation of state[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2012(2). |
| APA | Crittenden, RG,Zhao, GB,Pogosian, L,Samushia, L,&Zhang, XM.(2012).Fables of reconstruction: controlling bias in the dark energy equation of state.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(2). |
| MLA | Crittenden, RG,et al."Fables of reconstruction: controlling bias in the dark energy equation of state".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .2(2012). |
入库方式： OAI收割
来源：物理研究所
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