Tidal dynamics in cosmological spacetimes

被引：37

作者：

Mashhoon, Bahram ^{[1
]}

Mobed, Nader

Singh, Dinesh

机构：

[1] Univ Missouri, Dept Phys & Astron, Columbia, MO 65211 USA

[2] Univ Regina, Dept Phys, Regina, SK S4S 0A2, Canada

来源：

CLASSICAL AND QUANTUM GRAVITY | 2007年 / 24卷 / 20期

关键词：

D O I：

10.1088/0264-9381/24/20/008

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study the relative motion of nearby free test particles in cosmological spacetimes, such as the FLRW and LTB models. In particular, the influence of spatial inhomogeneities on local tidal accelerations is investigated by means of simple spherically symmetric models. The implications of our results for the dynamics of the solar system are briefly discussed. That is, on the basis of the models studied in this paper, we estimate the tidal influence of the cosmic gravitational field on the orbit of the Earth around the Sun and show that the corresponding temporal rate of variation of the astronomical unit is negligibly small.

引用

页码：5031 / 5046

页数：16

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