论文标题
黑洞的一般参数化：重要的参数
General parametrization of black holes: the only parameters that matter
论文作者
论文摘要
在任意重力理论中黑洞时空的一般参数化包括一组无限的参数。自然而然地假设必需的天体可观察的数量，例如准模式，阴影参数，电磁辐射的参数，电磁辐射和黑洞附近的积聚物，必须主要取决于其中一些参数。从以无限的持续分数的形式开始的球形对称配置的参数化开始，我们建议以仅三个和四个参数的形式对渐近平坦的球形对称和缓慢旋转的黑洞进行紧凑的表示。属于卡特家族的任意旋转黑洞的子类也只能通过四个参数进行参数。黑洞度量的大概表示应允许人们描述强力区域中的物理可观察物。
The general parametrization of a black-hole spacetime in arbitrary metric theories of gravity includes an infinite set of parameters. It is natural to suppose that essential astrophysically observable quantities, such as quasinormal modes, parameters of shadow, electromagnetic radiation and accreting matter in the vicinity of a black hole, must depend mostly on a few of these parameters. Starting from the parametrization for spherically symmetric configurations in the form of infinite continued fraction, we suggest a compact representation of the asymptotically flat spherically symmetric and slowly rotating black holes in terms of only three and four parameters respectively. A subclass of arbitrarily rotating black holes belonging to the Carter family can also be parametrized by only four parameters. This approximate representation of a black-hole metric should allow one to describe physical observables in the region of strong gravity.
