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arXiv 1303.0519gr-qcastro-ph.COhep-th
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旋转黑洞毛

Rotating black hole hair

Ruth Gregory, David Kubiznak, Danielle Wills

摘要:

在阿贝尔Higgs模型涡旋的背景下研究了一个带有宇宙弦毛的Kerr黑洞。结果表明,这样一个系统显示出比静态Schwarzschild或Reissner-Nordstrom表兄弟更丰富的现象,例如,旋转产生近视界电场。在极端旋转的黑洞中,希格斯头发可能有两个阶段:大型黑洞呈现出标准的头发,漩涡穿透事件视界。另一方面,小黑洞则呈现出通量驱逐解,规范场和标量场在事件视界上保持相同的假真空状态。然而,这个解决方案是非常敏感的数值确认,我们推测,它是不稳定的,由于superradiant机制类似的克尔adS不稳定性。最后,我们计算了涡旋的引力反作用,结果证明它比简单的锥形赤字要微妙得多。当弦产生圆锥效应时,它是相对于局部共旋转坐标系的圆锥,而不是相对于无穷远处的静态坐标系的圆锥。结果,我们发现能层被移动,黑洞周围的测地线被扰动。

英文摘要:

A Kerr black hole sporting cosmic string hair is studied in the context of the abelian Higgs model vortex. It is shown that a such a system displays much richer phenomenology than its static Schwarzschild or Reissner--Nordstrom cousins, for example, the rotation generates a near horizon electric field. In the case of an extremal rotating black hole, two phases of the Higgs hair are possible: Large black holes exhibit standard hair, with the vortex piercing the event horizon. Small black holes on the other hand, exhibit a flux-expelled solution, with the gauge and scalar field remaining identically in their false vacuum state on the event horizon. This solution however is extremely sensitive to confirm numerically, and we conjecture that it is unstable due to a supperradiant mechanism similar to the Kerr-adS instability. Finally, we compute the gravitational back reaction of the vortex, which turns out to be far more nuanced than a simple conical deficit. While the string produces a conical effect, it is conical with respect to a local co-rotating frame, not with respect to the static frame at infinity. As a consequence, we find that the ergosphere is shifted, and geodesics around the black hole are perturbed.

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