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arXiv 0705.1312gr-qcastro-ph
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宇宙时空中的潮汐动力学

Tidal Dynamics in Cosmological Spacetimes

Bahram Mashhoon, Nader Mobed, Dinesh Singh

摘要:

我们研究宇宙时空中邻近自由测试粒子的相对运动,如FLRW和LTB模型。特别是,局部潮汐加速度的空间不均匀性的影响进行了研究。简要讨论了我们的结果对太阳系动力学的影响。也就是说,在本文所研究的模型的基础上,我们估计了宇宙引力场对地球绕日轨道的潮汐影响,并表明相应的天文单位的时间变化率是可以忽略不计的小。

英文摘要:

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. 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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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