Probing an Extended Uncertainty Principle black hole with gravitational lensings

被引：24

作者：

Lu, Xu ^{[1
,2
]}

Xie, Yi ^{[1
,2
]}

机构：

[1] Nanjing Univ, Sch Astron & Space Sci, Nanjing 210023, Jiangsu, Peoples R China

[2] Nanjing Univ, Key Lab Modern Astron & Astrophys, Minist Educ, Nanjing 210023, Jiangsu, Peoples R China

来源：

MODERN PHYSICS LETTERS A | 2019年 / 34卷 / 20期

基金：

中国国家自然科学基金;

关键词：

Extended uncertainty principle; black hole; gravitational lensing; GRAVITY; FIELD; DEFLECTION;

D O I：

10.1142/S0217732319501529

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study signals of the weak and strong deflection gravitational lensings by an Extended Uncertainty Principle (EUP) black hole, which is based on a modified Heisenberg relation with an additional correction of position-uncertainty. Gravitational lensing observables, including positions, magnifications and differential time delays between lensed images, are obtained in both scenarios and analyzed for the supermassive black holes (SMBHs) in the Galactic Center (Sgr A*) and M87. We find that, for Sgr A*, measurements on the separation between the primary and secondary images in the weak deflection lensing and the apparent size of the photon sphere in the strong deflection lensing are two feasible ways to constrain EUP, imposing comparable lower bounds on the fundamental scale of EUP as similar to 10(10) m. For the SMBH in M87, measurements on strong deflection lensing observables are only available and they can give a much bigger lower bound as similar to 10(13) m. These results might provide hints for probing EUP black holes by gravitational lensings.

引用

页数：11

共 58 条

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