Strong deflection gravitational lensing by a modified Hayward black hole

被引：56
|
作者：
Zhao, Shan-Shan [1 ,2 ]
Xie, Yi [1 ,2 ]
机构：
[1] Nanjing Univ, Sch Astron & Space Sci, Nanjing 210023, Jiangsu, Peoples R China
[2] Nanjing Univ, Minist Educ, Key Lab Modern Astron & Astrophys, Nanjing 210093, Jiangsu, Peoples R China
来源：
EUROPEAN PHYSICAL JOURNAL C | 2017年 / 77卷 / 05期
基金：
中国国家自然科学基金;
关键词：
SGR A-ASTERISK; LIGHT PHOTONS; VACUUM POLARIZATION; ACCRETION; FASTER; FIELD; STAR; PROPAGATION; TELESCOPE; VELOCITY;
D O I：
10.1140/epjc/s10052-017-4850-5
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：
A modified Hayward black hole is a nonsingular black hole. It is proposed that it would form when the pressure generated by quantum gravity can stop matter's collapse as the matter reaches the Planck density. Strong deflection gravitational lensing occurring nearby its event horizon might provide some clues of these quantum effects in its central core. We investigate observables of the strong deflection lensing, including angular separations, brightness differences and time delays between its relativistic images, and we estimate their values for the supermassive black hole in the Galactic center. We find that it is possible to distinguish the modified Hayward black hole from a Schwarzschild one, but it demands a very high resolution, beyond current stage.
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页数：10
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