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

页数：5

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