f(R) gravity:: From the Pioneer anomaly to cosmic acceleration

被引：64

作者：

Saffari, Reza ^{[1
]}

Rahvar, Sohrab ^{[2
]}

机构：

[1] Inst Adv Studies Basic Sci, Zanjan, Iran

[2] Sharif Univ Technol, Dept Phys, Tehran, Iran

来源：

PHYSICAL REVIEW D | 2008年 / 77卷 / 10期

关键词：

D O I：

10.1103/PhysRevD.77.104028

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We use metric formalism in f (R) modified gravity to study the dynamics of various systems from the solar system to the cosmological scale. We assume an ansatz for the derivative of action as a function of distance and describe the Pioneer anomaly and the flat rotation curve of the spiral galaxies. Having the asymptotic behavior of action, we propose the action of f(R) = (R + Lambda)(1 + ln(R/R-c)/(R/R-0 + 2/alpha)) where in galactic and solar system scales it can recover our desired form. The vacuum solution of this action also results in a positive late time acceleration for the Universe. We fix the parameters of this model, comparing with the Pioneer anomaly, rotation curve of spiral galaxies, and supernova type la gold sample data.

引用

页数：6

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