当前位置: X-MOL 学术Phys. Rev. D › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Penrose process for a charged black hole in a uniform magnetic field
Physical Review D ( IF 5 ) Pub Date : 2021-10-15 , DOI: 10.1103/physrevd.104.084059
Kshitij Gupta , Y. T. Albert Law , Janna Levin

Spinning black holes create electromagnetic storms when immersed in ambient magnetic fields, illuminating the otherwise epically dark terrain. In an electromagnetic extension of the Penrose process, tremendous energy can be extracted, boosting the energy of radiating particles far more efficiently than the mechanical Penrose process. We locate the regions from which energy can be mined and demonstrate explicitly that they are no longer restricted to the ergosphere. We also show that there can be toroidal regions that trap negative energy particles in orbit around the black hole. We find that the effective charge coupling between the black hole and the superradiant particles decreases as energy is extracted, much like the spin of a black hole decreases in the mechanical analogue. While the effective coupling decreases, the actual charge of the black hole increases in magnitude reaching the energetically-favored Wald value, at which point energy extraction is impeded. We demonstrate the array of orbits for products from the electromagnetic Penrose process.

中文翻译:

均匀磁场中带电黑洞的彭罗斯过程

当沉浸在环境磁场中时,旋转的黑洞会产生电磁风暴,照亮原本极其黑暗的地形。在彭罗斯过程的电磁扩展中,可以提取巨大的能量,比机械彭罗斯过程更有效地提高辐射粒子的能量。我们定位了可以开采能源的区域,并明确证明它们不再局限于能层。我们还表明,可以有环形区域在黑洞周围的轨道上捕获负能量粒子。我们发现黑洞和超辐射粒子之间的有效电荷耦合随着能量的提取而减少,就像机械模拟中黑洞的自旋减少一样。当有效耦合降低时,黑洞的实际电荷量级增加,达到能量有利的 Wald 值,此时能量提取受到阻碍。我们展示了电磁彭罗斯过程产品的轨道阵列。
更新日期:2021-10-17
down
wechat
bug