A Friedmann cosmological model, generalized to the epoch of dominance of dark matter, is considered. Its equation of state is chosen in a new, nonstationary form. Basing our approach on the process of light propagation in such a metric, we have found its refractive index, which turns out to be a constant quantity (or more accurately, one that depends on the epoch of the end of dominance of dark matter) and predict a possible effect of a burst of incoming radiation.

中文翻译：

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暗物质占主导地位的宇宙中的几何光学

考虑了一个弗里德曼宇宙学模型，该模型被推广到暗物质占主导地位的时代。它的状态方程以一种新的、非平稳的形式被选择。基于我们在这种度量中光传播过程的方法，我们发现了它的折射率，结果证明它是一个常数（或更准确地说，取决于暗物质主导地位结束的时代）和预测入射辐射爆发的可能影响。