Shadow of a regular black hole in scalar-tensor-vector gravity theory

被引：20

作者：

Sau, Subhadip ^{[1
,2
]}

Moffat, John W. ^{[3
,4
]}

机构：

[1] Jhargram Raj Coll, Dept Phys, Jhargram 721507, West Bengal, India

[2] Indian Assoc Cultivat Sci, Sch Phys Sci, 2A & 2B Raja SC Mullick Rd, Kolkata 700032, India

[3] Perimeter Inst Theoret Phys, Waterloo, ON N2L 2Y5, Canada

[4] Univ Waterloo, Dept Phys & Astron, Waterloo, ON N2L 3G1, Canada

来源：

PHYSICAL REVIEW D | 2023年 / 107卷 / 12期

关键词：

WEAK-FIELD APPROXIMATION; TELESCOPE RESULTS. VI; A-ASTERISK; DARK-MATTER; OBSERVATIONAL TEST; MASS; MODELS; EHT; I;

D O I：

10.1103/PhysRevD.107.124003

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We investigate the shadow cast by a regular black hole in scalar-tensor-vector modified gravity theory. This black hole differs from a Schwarzschild-Kerr black hole by the dimensionless parameter f. The size of the shadow depends on this parameter. Increasing the value of the parameterf shrinks the shadow. A critical value of the parameter f is found to be fcrit 1/4 0.40263. The shadow for the horizonless dark compact object has been analyzed for the static, spherically symmetric case and compared with M87* and Sgr A* data. Shadow observables have been determined in the context of the regular black hole and used for obtaining the energy emission rate. The peak of the energy emission rate shifts to lower frequency for the increasing value of the parameter f.

引用

页数：16

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