Horizon surface gravity as 2D geodesic expansion

被引：9
|
作者：
Jacobson, Ted [1 ]
Parentani, Renaud [2 ]
机构：
[1] Univ Maryland, Dept Phys, College Pk, MD 20742 USA
[2] Univ Paris 11, CNRS, Phys Theor Lab, UMR 8627, F-91405 Orsay, France
来源：
CLASSICAL AND QUANTUM GRAVITY | 2008年 / 25卷 / 19期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1088/0264-9381/25/19/195009
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The surface gravity of any Killing horizon, in any spacetime dimension, can be interpreted as a local, two-dimensional expansion rate seen by freely falling observers when they cross the horizon. Any two-dimensional congruence of geodesics invariant under the Killing flow can be used to define this expansion, provided that the observers have unit Killing energy.
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页数：5
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