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Probing the curvature and dark energy
Gong, YG; Zhang, YZ; Gong, YG , Chongqing Univ Posts & Telecommun, Coll Elect Engn, Chongqing 400065, Peoples R China.
2005
发表期刊PHYSICAL REVIEW D
ISSN1550-7998
卷号72期号:4页码:-
摘要Two new one-parameter tracking behavior dark energy representations omega=omega(0)/(1+z) and omega=omega(0)e(z/(1+z))/(1+z) are used to probe the geometry of the Universe and the property of dark energy. The combined type Ia supernova, Sloan Digital Sky Survey, and Wilkinson Microwave Anisotropy Probe data indicate that the Universe is almost spatially flat and that dark energy contributes about 72% of the matter content of the present universe. The observational data also tell us that omega(0)similar to-1. It is argued that the current observational data can hardly distinguish different dark energy models to the zeroth order. The transition redshift when the expansion of the Universe changed from deceleration phase to acceleration phase is around z(T)similar to 0.6 by using our one-parameter dark energy models.
部门归属Chongqing Univ Posts & Telecommun, Coll Elect Engn, Chongqing 400065, Peoples R China; CCAST World Lab, Beijing 100080, Peoples R China; Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
关键词Hubble-space-telescope Cosmological Constant Cosmic Acceleration Supernova Constraints Universe Model Quintessence Redshift Equation
学科领域Physics
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收录类别SCI
WOS记录号WOS:000231565000032
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文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/13774
专题理论物理所1978-2010年知识产出
通讯作者Gong, YG , Chongqing Univ Posts & Telecommun, Coll Elect Engn, Chongqing 400065, Peoples R China.
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Gong, YG,Zhang, YZ,Gong, YG , Chongqing Univ Posts & Telecommun, Coll Elect Engn, Chongqing 400065, Peoples R China.. Probing the curvature and dark energy[J]. PHYSICAL REVIEW D,2005,72(4):-.
APA Gong, YG,Zhang, YZ,&Gong, YG , Chongqing Univ Posts & Telecommun, Coll Elect Engn, Chongqing 400065, Peoples R China..(2005).Probing the curvature and dark energy.PHYSICAL REVIEW D,72(4),-.
MLA Gong, YG,et al."Probing the curvature and dark energy".PHYSICAL REVIEW D 72.4(2005):-.
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