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arXiv 1011.0167gr-qcastro-ph.HEhep-th
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粒子被黑洞加速的一般解释

Acceleration of particles by black holes -- general explanation

Oleg B. Zaslavskii

摘要:

对黑洞对粒子的无束缚加速效应给出了简单而一般的解释。这是因为在某些特殊情况下,进入粒子的四速度的类时矢量与类光视界生成元的标量积趋于零,从而“在时间中向前运动”的条件勉强满足。在这个意义上,一个参数之间具有特殊关系的进入粒子模仿了黑洞未来视界附近的任何出射粒子的典型的无限红移特性。我们检查这个断言使用Reissner-Nordstrom和旋转轴对称度量作为例子。

英文摘要:

We give simple and general explanation to the effect of unbound acceleration of particles by black holes. It is related to the fact that the scalar product of a timelike vector of the four-velocity of an ingoing particle and the lightlike horizon generator tends to zero in some special cases, so the condition of "motion forward in time" is marginally satisfied. In this sense, an ingoing particle with special relation between parameters imitates the property of infinite redshift typical of any outgoing particle near the future horizon of a black hole. We check this assertion using the Reissner-Nordstrom and rotating axially-symmetric metrics as examples.

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