On dark energy isocurvature perturbation

	On dark energy isocurvature perturbation
	Liu J(刘杰); Zhang XM(张新民); Liu, J; Li, MZ; Zhang, XM
刊名	JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
	2011
期号	6 页码:28
关键词	dark energy experiments dark energy theory
通讯作者	[Liu, Jie ; Zhang, Xinmin] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China ; [Li, Mingzhe] Nanjing Univ, Dept Phys, Nanjing 210093, Peoples R China ; [Zhang, Xinmin] Chinese Acad Sci, TPCSF, Beijing 100049, Peoples R China ; [Li, Mingzhe] Nanjing Univ, Purple Mt Observ, Joint Ctr Particle Nucl Phys & Cosmol, Nanjing 210093, Peoples R China
英文摘要	Determining the equation of state of dark energy with astronomical observations is crucially important to understand the nature of dark energy. In performing a likelihood analysis of the data, especially of the cosmic microwave background and large scale structure data the dark energy perturbations have to be taken into account both for theoretical consistency and for numerical accuracy. Usually, one assumes in the global fitting analysis that the dark energy perturbations are adiabatic. In this paper, we study the dark energy isocurvature per analytically and discuss its implications for the cosmic microwave background radiation and large scale structure. Furthermore, with the current astronomical observational data and by employing Markov Chain Monte Carlo method, we perform a global analysis of cosmological parameters assuming general Initial conditions for the dark energy perturbations. The results show that the dark energy isocurvature perturbations are very weakly constrained and that purely adiabatic initial conditions are consistent with the data.
学科主题	Astronomy & Astrophysics; Physics
类目[WOS]	Astronomy & Astrophysics ; Physics, Particles & Fields
研究领域[WOS]	Astronomy & Astrophysics ; Physics
原文出处	SCI
语种	英语
WOS记录号	WOS:000292332400028
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/240372]
专题	高能物理研究所_理论物理室
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Liu J,Zhang XM,Liu, J,et al. On dark energy isocurvature perturbation[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2011(6):28.
APA	刘杰,张新民,Liu, J,Li, MZ,&Zhang, XM.(2011).On dark energy isocurvature perturbation.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(6),28.
MLA	刘杰,et al."On dark energy isocurvature perturbation".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .6(2011):28.