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arXiv 0806.2365gr-qcastro-phmath-phmath.MP
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修正的Brans-Dicke宇宙方程的对称性分析和精确解

Symmetry analysis and exact solutions of modified Brans-Dicke cosmological equations

Metin Arik, Mikhail B. Sheftel

摘要:

我们对修正的Brans-Dicke宇宙学方程进行了对称性分析,并给出了精确解。我们讨论的解决方案可能有助于建立宇宙学模型,在早期宇宙中,膨胀是线性的,状态方程只是改变膨胀速度,但不是线性。对于晚期宇宙,膨胀是指数的,状态方程对膨胀率的影响只是改变了常数哈勃参数。

英文摘要:

We perform a symmetry analysis of modified Brans-Dicke cosmological equations and present exact solutions. We discuss how the solutions may help to build models of cosmology where, for the early universe, the expansion is linear and the equation of state just changes the expansion velocity but not the linearity. For the late universe the expansion is exponential and the effect of the equation of state on the rate of expansion is just to change the constant Hubble parameter.

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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