Estimating total momentum at finite distances

被引：10

作者：

Gallo, Emanuel ^{[1
]}

Lehner, Luis ^{[2
]}

Moreschi, Osvaldo M. ^{[1
]}

机构：

[1] Natl Univ Cordoba, FaMAF, RA-5000 Cordoba, Argentina

[2] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA

来源：

PHYSICAL REVIEW D | 2008年 / 78卷 / 08期

关键词：

D O I：

10.1103/PhysRevD.78.084027

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study the difficulties associated with the evaluation of the total Bondi momentum at finite distances around the central source of a general (asymptotically flat) spacetime. Since the total momentum is only rigorously defined at future null infinity, both finite distance and gauge effects must be taken into account for a correct computation of this quantity. Our discussion is applicable in general contexts but is particularly relevant in numerically constructed spacetimes for both extracting important physical information and assessing the accuracy of additional quantities.

引用

页数：11

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