论文标题
暗物质是动态宇宙的自然结果吗？
Could dark matter be a natural consequence of a dynamical universe?
论文作者
论文摘要
我们在常规的一般相对性中构造了孤立的复合系统的引力质量，并调查何时定义该数量。对于固定空间，已知该数量完全等于物理（ADM）质量。但是，在没有及时的杀伤向量的情况下，这两个群众是否相等仍然是一个悬而未决的问题。这尤其是属性，因为我们的宇宙具有“起源”，因此没有这样的杀戮向量。此外，如果这些群众不同意，那么复合系统就会表现得好像它们具有“黑暗成分”，其重力质量不会等于存在的物理质量能量。这种明显的差异的存在确实在星系和星系簇中无处不在，尽管目前归因于暗物质的存在。我们得出的结论是，这些质量在动力学上的关系的理论问题已经成熟。
We construct the gravitating mass of an isolated composite system on asymptotically-flat spacetimes within conventional general relativity and investigate when this quantity is well defined. For stationary spacetimes, this quantity is known to exactly equal the physical (ADM) mass. However, it remains an open question whether these two masses are equal in the absence of a timelike Killing vector. This is especially apropos since our universe has an `origin' and hence no such Killing vector. Further, if these masses failed to agree then composite systems could behave as if they had a `dark component,' whose gravitating mass would not equal the physical mass-energy present. The existence of such an apparent discrepancy is indeed ubiquitous in galaxies and galaxy clusters, though currently it is attributed to the presence of dark matter. We conclude that the theoretical question of the relation between these masses for dynamical spacetimes is ripe for attention.
