IHEP OpenIR  > 理论物理室
Constraining cosmological parameters with observational data including weak lensing effects
Li H(李虹); Liu J(刘杰); Li, H; Liu, J; Xia, JQ; Sun, L; Fan, ZH; Tao, CL; Tilquin, A; Zhang, XM; Zhang XM(张新民)
2009
发表期刊PHYSICS LETTERS B
卷号675期号:2页码:#REF!
通讯作者Li, H (reprint author), Chinese Acad Sci, Inst High Energy Phys, POB 918-4, Beijing 100049, Peoples R China.
文章类型Article
摘要In this Letter we study the cosmological implications of the 100 square degree Weak Lensing survey (the CFHTLS-Wide, RCS, VIRMOS-DESCART and GaBoDS surveys). We combine these weak lensing data with the cosmic microwave background (CMB) measurements from the WMAP5, BOOMERanG, CBI, VSA, ACBAR, the SDSS LRG matter power spectrum and the Type la Supernoave (SNla) data with the "Union" compilation (307 sample), using the Markov Chain Monte Carlo method to determine the cosmological parameters, such as the equation-of-state (EoS) of dark energy w, the density fluctuation amplitude sigma(8), the total neutrino mass Sigma m(v), and the parameters associated with the power spectrum of the primordial fluctuations. Our results show that the Lambda CDM model remains a good fit to all of these data. In a flat universe, we obtain a tight limit on the constant EoS of dark energy, w = -0.97 +/- 0.041 (1 sigma). For the dynamical dark energy model with time evolving EoS parameterized as w(de)(a) = w(0) + w(a) (1-a), we find that the best-fit values are w(0) = -1.064 and w(a) = 0.375, implying the mildly preference of Quintom model whose EoS gets across the cosmological constant boundary during evolution. Regarding the total neutrino mass limit, we obtain the tipper limit, Sigma m(v) < 0.471 eV (95% C.L.) within the framework of the flat Lambda CDM model. Due to the obvious degeneracies between the neutrino mass and the EoS of dark energy model, this upper limit will be relaxed by a factor of 2 in the framework of dynamical dark energy models. Assuming that the primordial fluctuations are adiabatic with a power law spectrum, within the Lambda CDM model, we find that the upper limit on the ratio of the tensor to scalar is r < 0.35 (95% C.L.) and the inflationary models with the slope n(s) >= 1 are excluded at more than 2 sigma confidence level. In this Letter we pay particular attention to the contribution front the weak lensing data and find that the current weak lensing data do improve the constraints on matter density Omega(m), sigma(8), Sigma m(v), and the EoS of dark energy. (C) 2009 Elsevier B.V. All rights reserved.
学科领域Physics
DOI10.1016/j.physletb.2009.04.015
收录类别SCI
WOS类目Physics, Multidisciplinary
WOS记录号WOS:000266131900004
引用统计
被引频次:19[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/311005/226614
专题理论物理室
粒子天体物理中心
推荐引用方式
GB/T 7714
Li H,Liu J,Li, H,et al. Constraining cosmological parameters with observational data including weak lensing effects[J]. PHYSICS LETTERS B,2009,675(2):#REF!.
APA 李虹.,刘杰.,Li, H.,Liu, J.,Xia, JQ.,...&张新民.(2009).Constraining cosmological parameters with observational data including weak lensing effects.PHYSICS LETTERS B,675(2),#REF!.
MLA 李虹,et al."Constraining cosmological parameters with observational data including weak lensing effects".PHYSICS LETTERS B 675.2(2009):#REF!.
条目包含的文件
文件名称/大小 文献类型 版本类型 开放类型 使用许可
1793.pdf(488KB)期刊论文作者接受稿限制开放CC BY-NC-SA请求全文
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[李虹]的文章
[刘杰]的文章
[Li, H]的文章
百度学术
百度学术中相似的文章
[李虹]的文章
[刘杰]的文章
[Li, H]的文章
必应学术
必应学术中相似的文章
[李虹]的文章
[刘杰]的文章
[Li, H]的文章
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。