Knowledge Management System of Institute of Theoretical Physics, CAS
| Meng, XH; Wang, P; Meng, XH , Nankai Univ, Dept Phys, Tianjin 300071, Peoples R China. | |
| Modified Friedmann equations in R-1-modified gravity | |
| 发表期刊 | CLASSICAL AND QUANTUM GRAVITY
 |
| 关键词 | Cosmological Constant Accelerating Universe Newtonian Dynamics Quintessence Supernovae Brane |
| 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. |
| 2003 | |
| ISSN | 0264-9381 |
| 卷号 | 20期号:22页码:4949-4961 |
| 学科领域 | Physics |
| 收录类别 | SCI |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.itp.ac.cn/handle/311006/14181 |
| 专题 | 理论物理所科研产出_SCI论文 |
| 通讯作者 | Meng, XH , Nankai Univ, Dept Phys, Tianjin 300071, Peoples R China. |
| 推荐引用方式 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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