Impact of densitized lapse slicings on evolutions of a wobbling black hole

被引：21

作者：

Sperhake, U ^{[1
]}

Smith, KL

Kelly, B

Laguna, P

Shoemaker, D

机构：

[1] Penn State Univ, Ctr Gravitat Phys & Geometry, University Pk, PA 16802 USA

[2] Penn State Univ, Ctr Gravitat Wave Phys, University Pk, PA 16802 USA

[3] Cornell Univ, Ctr Radiophys & Space Res, Ithaca, NY 14853 USA

来源：

PHYSICAL REVIEW D | 2004年 / 69卷 / 02期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevD.69.024012

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present long-term stable and convergent evolutions of an excised wobbling black hole. Our results clearly demonstrate that the use of a densitized lapse function extends the lifetime of simulations dramatically. We also show the improvement in the stability of single static black holes when an algebraic densitized lapse condition is applied. In addition, we introduce a computationally inexpensive approach for tracking the location of the singularity suitable for mildly distorted black holes. The method is based on investigating the fall-off behavior and asymmetry of appropriate grid variables. This simple tracking method allows one to adjust the location of the excision region to follow the coordinate motion of the singularity.

引用

页数：10

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