Probing for dynamics of dark energy and curvature of universe with latest cosmological observations
Zhao GB(赵公博); Xia JQ(夏俊卿); Zhao, GB; Xia, JQ; Li, H; Tao, C; Virey, JM; Zhu, ZH; Zhang, XM; Zhang XM(张新民)
刊名PHYSICS LETTERS B
2007
卷号648期号:1页码:8-13
学科分类Physics
DOI10.1016/j.physletb.2007.02.070
通讯作者Zhao, GB (reprint author), Chinese Acad Sci, Inst High Energy Phys, POB 918-4, Beijing 100049, Peoples R China.
文章类型Article
英文摘要We use the newly released 182 type la supernova data combined with the third-year Wilkinson Microwave Anisotropic Probe data (WMAP3) and large scale structure (LSS) information including SDSS and 2dFGRS to constrain the dark energy equation of state (EoS) as well as the curvature of universe Omega(K). Using the full dataset of Cosmic Microwave Background (CMB) and LSS rather than the shift parameter and linear growth factor, we make a Markov Chain Monte Carlo (MCMC) global fit, while paying particular attention to the dark energy perturbation. Parameterizing the EoS as w(DE)(a) = w(0)+w(1)(1-a), we find the best fit of (w(0), w(1)) is(-1.053, 0.944) and for W-DE(a) = w(0)+w(1) sin(3/2 pi ln(a)), the best fit for (w(0), w(1)) is (- 1.614, -1.046)). We find that a flat universe is a good approximation, namely, \Omega(K)\ > 0.06 has been excluded by 2 sigma yet the inclusion of Omega(K) can affect the measurement of DE parameters owing to their correlation and the present systematic effects of SNIa measurements. (c) 2007 Elsevier B.V. All rights reserved.
类目[WOS]Physics, Multidisciplinary
收录类别SCI
WOS记录号WOS:000246376700002
引用统计
被引频次:69[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/225468
专题中国科学院高能物理研究所_理论物理室_期刊论文
中国科学院高能物理研究所_粒子天体物理中心
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Zhao GB,Xia JQ,Zhao, GB,et al. Probing for dynamics of dark energy and curvature of universe with latest cosmological observations[J]. PHYSICS LETTERS B,2007,648(1):8-13.
APA 赵公博.,夏俊卿.,Zhao, GB.,Xia, JQ.,Li, H.,...&张新民.(2007).Probing for dynamics of dark energy and curvature of universe with latest cosmological observations.PHYSICS LETTERS B,648(1),8-13.
MLA 赵公博,et al."Probing for dynamics of dark energy and curvature of universe with latest cosmological observations".PHYSICS LETTERS B 648.1(2007):8-13.
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