Characteristic extraction tool for gravitational waveforms

被引：55

作者：

Babiuc, M. C. ^{[1
,3
]}

Szilagyi, B. ^{[2
,3
]}

Winicour, J. ^{[3
,4
]}

Zlochower, Y. ^{[5
,6
]}

机构：

[1] Marshall Univ, Dept Phys, Huntington, WV 25755 USA

[2] CALTECH, Pasadena, CA 91125 USA

[3] Univ Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260 USA

[4] Albert Einstein Inst, Max Planck Inst Gravitat Phys, D-14476 Golm, Germany

[5] Rochester Inst Technol, Ctr Computat Relat & Gravitat, Rochester, NY 14623 USA

[6] Rochester Inst Technol, Sch Math Sci, Rochester, NY 14623 USA

来源：

PHYSICAL REVIEW D | 2011年 / 84卷 / 04期

基金：

美国国家科学基金会;

关键词：

CAUCHY-CHARACTERISTIC EXTRACTION; NUMERICAL RELATIVITY; CHARACTERISTIC EVOLUTION; GENERAL RELATIVITY; BLACK-HOLES; EQUATIONS; RADIATION; COLLAPSE; FIELDS;

D O I：

10.1103/PhysRevD.84.044057

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We develop and calibrate a characteristic waveform extraction tool whose major improvements and corrections of prior versions allow satisfaction of the accuracy standards required for advanced LIGO data analysis. The extraction tool uses a characteristic evolution code to propagate numerical data on an inner worldtube supplied by a 3 + 1 Cauchy evolution to obtain the gravitational waveform at null infinity. With the new extraction tool, high accuracy and convergence of the numerical error can be demonstrated for an inspiral and merger of mass M binary black holes even for an extraction worldtube radius as small as R = 20M. The tool provides a means for unambiguous comparison between waveforms generated by evolution codes based upon different formulations of the Einstein equations and based upon different numerical approximations.

引用

页数：23

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