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Modified Friedmann equations in R-1-modified gravity
Meng, XH; Wang, P; Meng, XH , Nankai Univ, Dept Phys, Tianjin 300071, Peoples R China.
2003
发表期刊CLASSICAL AND QUANTUM GRAVITY
ISSN0264-9381
卷号20期号:22页码:4949-4961
摘要Recently, corrections to the Einstein-Hilbert action that become important at small curvature have been proposed. We discuss the first-order and second-order approximations to the field equations derived by the Palatini variational principle. We work out the first- and second-order modified Friedmann equations and present the upper redshift bounds when these approximations are valid. We show that the second-order effects can be neglected in the cosmological predictions involving only the Hubble parameter, e.g. the various cosmological distances, but the second-order effects cannot be neglected in the predictions involving the derivatives of the Hubble parameter. Furthermore, the modified Friedmann equations fit the SNe Ia data at an acceptable level.
部门归属Nankai Univ, Dept Phys, Tianjin 300071, Peoples R China; Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
关键词Cosmological Constant Accelerating Universe Newtonian Dynamics Quintessence Supernovae Brane
学科领域Physics
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收录类别SCI
WOS记录号WOS:000187122900019
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文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/14181
专题理论物理所SCI论文
通讯作者Meng, XH , Nankai Univ, Dept Phys, Tianjin 300071, Peoples R China.
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GB/T 7714
Meng, XH,Wang, P,Meng, XH , Nankai Univ, Dept Phys, Tianjin 300071, Peoples R China.. Modified Friedmann equations in R-1-modified gravity[J]. CLASSICAL AND QUANTUM GRAVITY,2003,20(22):4949-4961.
APA Meng, XH,Wang, P,&Meng, XH , Nankai Univ, Dept Phys, Tianjin 300071, Peoples R China..(2003).Modified Friedmann equations in R-1-modified gravity.CLASSICAL AND QUANTUM GRAVITY,20(22),4949-4961.
MLA Meng, XH,et al."Modified Friedmann equations in R-1-modified gravity".CLASSICAL AND QUANTUM GRAVITY 20.22(2003):4949-4961.
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