Strong deflection gravitational lensing by an Einstein-Lovelock ultracompact object

被引：19
|
作者：
Gao, Yuan-Xing [1 ]
Xie, Yi [2 ]
机构：
[1] Nanjing Univ, Sch Astron & Space Sci, Nanjing 210023, Peoples R China
[2] Chinese Acad Sci, Purple Mt Observ, Nanjing 210023, Peoples R China
来源：
EUROPEAN PHYSICAL JOURNAL C | 2022年 / 82卷 / 02期
基金：
中国国家自然科学基金;
关键词：
BLACK-HOLES; EVENT; FIELD; LENSES; SHADOW; TESTS; MASS;
D O I：
10.1140/epjc/s10052-022-10128-z
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：
We investigate the strong deflection gravitational lensing by an Einstein-Lovelock ultracompact object. Its unique features are the relativistic images inside its photon sphere which are absent for an Einstein-Lovelock black hole. We obtain its lensing observables and evaluate their observability for the direct images of two supermassive black holes in the Galaxy and M87 respectively, Sgr A* and M87*, and for the relativistic microlensing on a star closely around Sgr A*. We find that although it is impossible to tell difference of the ultracompact object from the black hole in Einstein-Lovelock gravity by the direct images, it might be possible to distinguish the Einstein-Lovelock ultracompact object by measuring the total flux of the relativistic microlensing in the not-so-far future.
引用
收藏
页数：17
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