Fables of reconstruction: controlling bias in the dark energy equation of state

	Fables of reconstruction: controlling bias in the dark energy equation of state
	Crittenden, RG; Zhao, GB; Pogosian, L; Samushia, L; Zhang, XM; Zhang XM(张新民)
刊名	JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
	2012
期号	2 页码:48
关键词	dark energy experiments dark energy theory
英文摘要	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
学科主题	Astronomy & Astrophysics; Physics
收录类别	SCI
WOS记录号	WOS:000301176000049
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/224400]
专题	高能物理研究所_理论物理室
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):48.
APA	Crittenden, RG,Zhao, GB,Pogosian, L,Samushia, L,Zhang, XM,&张新民.(2012).Fables of reconstruction: controlling bias in the dark energy equation of state.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(2),48.
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):48.