球对称的电平衡尘埃要么坍缩要么弥散
Spherically symmetric electrically counterpoised dust either collapses or disperses
AI总结:
本研究分析广义相对论中球对称电平衡尘埃的动力学,证明任何微小速度扰动都会使其坍缩为极端 Reissner-Nordström 黑洞或发生弥散,否定其中性平衡与黑洞模拟体可行性。
摘要:
我们在广义相对论中探究由电平衡尘埃构成的球对称天体的动力学演化。此前有人声称这些天体处于中性平衡状态,因此由电平衡尘埃构成的黑洞模拟体是可行的。在此我们表明,若流体元被赋予速度,无论该速度多么微小,演化都将导致黑洞或流体弥散。此外,在坍缩情形下,所得天体必然是一个极端 Reissner-Nordström 黑洞。
英文摘要:
We explore the dynamical evolution of spherically symmetric objects made of electrically counterpoised dust in general relativity. It has been claimed that these objects are in neutral equilibrium and, therefore, that black hole mimickers made of electrically counterpoised dust are feasible. Here we show that if a velocity is imparted to the fluid elements, no matter how small, the evolution leads either to a black hole or to the dispersion of the fluid. Furthermore, in the case of collapse, the resulting object is necessarily an extremal Reissner-Nordström black hole.
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。