Horizon pretracking

被引：13

作者：

Schnetter, E ^{[1
]}

Herrmann, F ^{[1
]}

Pollney, D ^{[1
]}

机构：

[1] Max Planck Inst Gravitat Phys, Albert Einstein Inst, D-14476 Potsdam, Germany

来源：

PHYSICAL REVIEW D | 2005年 / 71卷 / 04期

关键词：

D O I：

10.1103/PhysRevD.71.044033

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We introduce horizon pretracking as a method for analyzing numerically generated spacetimes of merging black holes. Pretracking consists of following certain modified constant expansion surfaces during a simulation before a common apparent horizon has formed. The tracked surfaces exist at all times, and are defined so as to include the common apparent horizon if it exists. The method provides a way for finding this common apparent horizon in an efficient and reliable manner at the earliest possible time. We can distinguish inner and outer horizons by examining the distortion of the surface. Properties of the pretracking surface such as its expansion, location, shape, area, and angular momentum can also be used to predict when a common apparent horizon will appear, and its characteristics. The latter could also be used to feed back into the simulation by adapting, e.g., boundary or gauge conditions even before the common apparent horizon has formed.

引用

页码：044033 / 1

页数：14

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