论文标题
将牛顿宇宙学的类比变成相对论问题
Turning a Newtonian analogy for FLRW cosmology into a relativistic problem
论文作者
论文摘要
牛顿统一的球在空白空间中扩展是FLRW宇宙学的常见启发式类比。我们讨论了相应的一般流行性问题的可能实现以及它们引起的各种新的宇宙学类比。我们强调了牛顿类比的基本要素，包括准能量始终是“牛顿”的，因为韦尔张量的磁性部分不影响它。爱因斯坦 - 弗里德曼方程的对称性在原始牛顿系统中产生了另一个。
A Newtonian uniform ball expanding in empty space constitutes a common heuristic analogy for FLRW cosmology. We discuss possible implementations of the corresponding general-relativistic problem and a variety of new cosmological analogies arising from them. We highlight essential ingredients of the Newtonian analogy, including that the quasilocal energy is always `Newtonian' in the sense that the magnetic part of the Weyl tensor does not contribute to it. A symmetry of the Einstein-Friedmann equations produces another one in the original Newtonian system.
