具有排斥引力的超大质量星系中心
Supermassive galactic centre with repulsive gravity
摘要：
排斥引力起源于1939年奥本海默和斯奈德的文章，描述了一颗恒星，它是一颗理想化的恒星，由非相互作用的物质（尘埃）在自己的引力下坍缩。恒星物质有一个类似足球的最终状态，即它的一个重要部分集中在一个薄的表面壳层中。强引力场施加的内部压力相当于负质量。然而，OS的解决方案被误解了，壳层的位置被错误地等同于黑洞理论中的“事件视界“。虽然一半的物质集中在一个占据半径一小部分的壳层中，但一些物质散布在整个内部，这与黑洞奇点中的物质集中不同。我们处理的奇异性在壳层表面的密度，包括费米压力的退化电子的壳层密度相当于太阳质量大小的白矮星。由于高密度区域集中在壳层中，而不是像黑洞那样集中在中心，我们的结论是，排斥引力使超大质量白矮星的存在成为可能。
英文摘要：
Repulsive gravity has its origin in the 1939 article of Oppenheimer and Snyder which describes a collapsar, that is an idealized star of non-interacting material (dust) collapsing under its own gravity. The stellar material has a final state resembling a football, that is a significant part of it is concentrated in a thin surface shell. An interior pressure is exerted by the strong gravitational field, equivalent to a negative mass. However, the OS solution has been misunderstood, the shell's position being incorrectly identified with the "event horizon" in black-hole theory. While half the material is concentrated in a shell occupying a small fraction of the radius, some material is spread throughout the interior, unlike the concentration in a black hole's singularity. We deal with the singularity in density at the shell surface, by including Fermi pressure of degenerate electrons for a shell density comparable to a solar mass-sized white dwarf. Because the high-density region is concentrated in a shell, instead of at the centre as in a black hole, our conclusion is that repulsive gravity enables the existence of supermassive white dwarfs.
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