The Shadows of Regular Black Holes with Asymptotic Minkowski Cores

被引：20

作者：

Ling, Yi ^{[1
,2
]}

Wu, Meng-He ^{[3
,4
]}

机构：

[1] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China

[2] Univ Chinese Acad Sci, Sch Phys, Beijing 100049, Peoples R China

[3] Shanghai Univ Engn Sci, Sch Math Phys & Stat, Shanghai 201620, Peoples R China

[4] Shanghai Univ Engn Sci, Ctr Applicat & Res Computat Phys, Shanghai 201620, Peoples R China

来源：

SYMMETRY-BASEL | 2022年 / 14卷 / 11期

基金：

英国科研创新办公室; 中国国家自然科学基金;

关键词：

regular black hole; black hole shadow; shadow cast;

D O I：

10.3390/sym14112415

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

We investigate the shadows cast by a sort of new regular black hole which are characterized by an asymptotic Minkowski core and sub-Planckian curvature. First, we extend the metric with spherical symmetry to the one of rotating Kerr-like black holes and derive the null geodesics with a circular orbit near the horizon of the black hole. Then, we plot the shadows of black holes with different values for the deviation parameter. It is found that the size of the shadow shrinks with the increase in the deviation parameter, while the shape of the shadow becomes more deformed. In particular, by comparing with the shadow a Bardeen black hole and Hayward black hole with the same parameter values, we find that, in general, the shadows of black holes with Minkowski cores have larger deformations than those with de Sitter cores, which potentially provides a strategy to distinguish these two sorts of regular black holes with different cores by astronomical observation in the future.

引用

页数：15

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