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arXiv 1010.6205astro-ph.COgr-qc
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宇宙能量方程的推广

Generalizing the Cosmic Energy Equation

Yuri Shtanov, Varun Sahni

摘要:

我们将宇宙能量方程推广到大质量粒子通过形式为phi(a,r)的修正引力势相互作用的情况,该引力势可以通过膨胀因子a(t)明确地依赖于宇宙学时间。利用粒子动力学的非相对论近似,我们导出了具有重整化引力常量的Friedmann方程形式的宇宙膨胀方程。推广的Layzer-Irvine宇宙能量方程和相关的宇宙维里定理被应用到最近提出的一些修正的牛顿引力暗物质粒子之间的相互作用。我们还提请注意的可能性,宇宙能量方程可能被用来探测宇宙的膨胀历史,从而抛出的暗物质和暗能量的性质光。

英文摘要:

We generalize the cosmic energy equation to the case when massive particles interact via a modified gravitational potential of the form phi(a, r), which is allowed to explicitly depend upon the cosmological time through the expansion factor a(t). Using the nonrelativistic approximation for particle dynamics, we derive the equation for the cosmological expansion which has the form of the Friedmann equation with a renormalized gravitational constant. The generalized Layzer-Irvine cosmic energy equation and the associated cosmic virial theorem are applied to some recently proposed modifications of the Newtonian gravitational interaction between dark-matter particles. We also draw attention to the possibility that the cosmic energy equation may be used to probe the expansion history of the universe thereby throwing light on the nature of dark matter and dark energy.

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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