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arXiv 1503.08803gr-qc
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牛顿引力坍缩中的Schwarzschild度规和Friedmann方程

The Schwarzschild metric and the Friedmann equations from Newtonian Gravitational collapse

Eduardo I. Guendelman, Arka Prabha Banik, Gilad Granit, Tomer Ygael, Christian Rohrhofer

摘要:

众所周知,史瓦西空间的0 - 0分量可以通过缓慢运动粒子的测地线与牛顿方程匹配的要求来获得。给出这个结果,我们在这里表明,其余的组件可以通过要求,在一个自由落体半径与外部空间相匹配的牛顿尘埃球的内部确定该空间是史瓦西,如果没有病理存在。我们也能够确定,在牛顿宇宙学中出现的积分常数,与FLRW度规的空间曲率一致。这些结果至少在两个方面是有趣的,一个是从它的教学价值的角度来看,实际上不使用爱因斯坦方程的教学广义相对论和第二,事实上,一些结果归因于广义相对论可以得到不使用广义相对论表明,这些结果比特定的动力学指定的广义相对论更普遍。

英文摘要:

As is well known, the 0 - 0 component of the Schwarzschild space can be obtained by the requirement that the geodesic of slowly moving particles match the Newtonian equation. Given this result, we show here that the remaining components can be obtained by requiring that the inside of a Newtonian ball of dust matched at a free falling radius with the external space determines that space to be Schwarzschild, if no pathologies exist. Also we are able to determine that the constant of integration that appears in the Newtonian Cosmology, coincides with the spatial curvature of the FLRW metric. These results are of interest at least in two respects, one from the point of view of its pedagogical value of teaching General Relativity without in fact using Einstein's equation and second, the fact that some results attributed to General Relativity can be obtained without using General Relativity indicates that these results are more general than the particular dynamics specified by General Relativity.

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