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Probing dark energy dynamics from current and future cosmological observations
Zhao, GB; Zhang XM(张新民); Zhang, XM
2010
发表期刊PHYSICAL REVIEW D
卷号81期号:4页码:43518
通讯作者[Zhao, Gong-Bo] Inst Cosmol & Gravitat, Portsmouth PO1 3FX, Hants, England ; [Zhao, Gong-Bo] Simon Fraser Univ, Dept Phys, Burnaby, BC V5A 1S6, Canada ; [Zhang, Xinmin] Chinese Acad Sci, Inst High Energy Phys, Div Theoret Phys, Beijing 100049, Peoples R China ; [Zhang, Xinmin] Chinese Acad Sci, TPCSF, Beijing 100864, Peoples R China
文章类型Article
摘要We report the constraints on the dark energy equation-of-state w(z) using the latest "Constitution" SNe sample combined with the WMAP5 and Sloan Digital Sky Survey data. Assuming a flat Universe, and utilizing the localized principal component analysis and the model selection criteria, we find that the Lambda CDM model is generally consistent with the current data, yet there exists a weak hint of the possible dynamics of dark energy. In particular, a model predicting w(z) < -1 at z is an element of [0.25, 0.5) and w(z) > -1 at z is an element of [0.5, 0.75), which means that w(z) crosses -1 in the range of z is an element of [0.25, 0.75), is mildly favored at 95% confidence level. Given the best fit model for current data as a fiducial model, we make future forecast from the joint data sets of Joint Dark Energy Mission, Planck, and Large Synoptic Survey Telescope, and we find that the future surveys can reduce the error bars on the w bins by roughly a factor of 10 for a 5-w-bin model.
学科领域Astronomy & Astrophysics; Physics
DOI10.1103/PhysRevD.81.043518
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语种英语
WOS研究方向Astronomy & Astrophysics ; Physics
WOS类目Astronomy & Astrophysics ; Physics, Particles & Fields
WOS记录号WOS:000275898500032
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被引频次:27[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/311005/240614
专题理论物理室
作者单位中国科学院高能物理研究所
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Zhao, GB,Zhang XM,Zhang, XM. Probing dark energy dynamics from current and future cosmological observations[J]. PHYSICAL REVIEW D,2010,81(4):43518.
APA Zhao, GB,张新民,&Zhang, XM.(2010).Probing dark energy dynamics from current and future cosmological observations.PHYSICAL REVIEW D,81(4),43518.
MLA Zhao, GB,et al."Probing dark energy dynamics from current and future cosmological observations".PHYSICAL REVIEW D 81.4(2010):43518.
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