Redshift of a photon emitted along the black hole horizon

被引：10

作者：

Toporensky, A. V. ^{[1
,2
]}

Zaslavskii, O. B. ^{[2
,3
]}

机构：

[1] Lomonosov Moscow State Univ, Sternberg Astron Inst, Moscow, Russia

[2] Kazan Fed Univ, Kremlevskaya 18, Kazan 420008, Russia

[3] Kharkov VN Karazin Natl Univ, Dept Phys & Technol, 4 Svoboda Sq, UA-61022 Kharkov, Ukraine

来源：

EUROPEAN PHYSICAL JOURNAL C | 2017年 / 77卷 / 03期

关键词：

Black Hole; Frequency Shift; Wave Packet; Event Horizon; Bifurcation Point;

D O I：

10.1140/epjc/s10052-017-4747-3

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

In this work we derive some general features of the redshift measured by radially moving observers in the black hole background. Let observer 1 cross the black hole horizon emitting a photon, while observer 2 crossing the same horizon later receives it. We show that if (i) the horizon is the outer one (event horizon) and (ii) it is nonextremal, the received frequency is redshifted. This generalizes recent results in the literature. For the inner horizon (like in the Reissner-Nordstrom metric) the frequency is blueshifted. If the horizon is extremal, the frequency does not change. We derive explicit formulas describing the frequency shift in generalized Kruskal-and Lemaitre-like coordinates.

引用

页数：8