Fermat's principle in black-hole spacetimes

被引:6
作者
Hod, Shahar [1 ,2 ]
机构
[1] Ruppin Acad Ctr, IL-40250 Emek Hefer, Israel
[2] Hadassah Acad Coll, IL-91010 Jerusalem, Israel
来源
INTERNATIONAL JOURNAL OF MODERN PHYSICS D | 2018年 / 27卷 / 14期
关键词
Black holes; null circular geodesics;
D O I
10.1142/S0218271818470259
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Black-hole spacetimes are known to possess closed light rings. We here present a remarkably compact theorem which reveals the physically intriguing fact that these unique null circular geodesics provide the fastest way, as measured by asymptotic observers, to circle around spinning Kerr black holes.
引用
收藏
页数:5
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