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arXiv 1904.06752gr-qchep-th
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自举牛顿恒星和黑洞

Bootstrapped Newtonian stars and black holes

Roberto Casadio, Michele Lenzi, Octavian Micu

摘要:

我们研究了一个均匀的球的物质在一个自举描述的重力,其中包括一个超越牛顿耦合的重力自相互作用项的平衡配置。物质密度和压力都被认为是测试粒子引力势的来源。与广义相对论的情况不同,没有发现布赫达尔极限,并且原则上压力可以支持任意大的紧凑型恒星。通过将视界定义为测试粒子的逃逸速度等于光速的位置,就像在牛顿引力中一样,我们找到了发生这种情况的紧致度的最小值。这里找到的引力势的解可以有效地描述量子理论中宏观黑洞的内部,以及预测在非常紧凑的物体的强场区域中与广义相对论的偏差。

英文摘要:

We study equilibrium configurations of a homogenous ball of matter in a bootstrapped description of gravity which includes a gravitational self-interaction term beyond the Newtonian coupling. Both matter density and pressure are accounted for as sources of the gravitational potential for test particles. Unlike the general relativistic case, no Buchdahl limit is found and the pressure can in principle support a star of arbitrarily large compactness. By defining the horizon as the location where the escape velocity of test particles equals the speed of light, like in Newtonian gravity, we find a minimum value of the compactness for which this occurs. The solutions for the gravitational potential here found could effectively describe the interior of macroscopic black holes in the quantum theory, as well as predict consequent deviations from general relativity in the strong field regime of very compact objects.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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