文献类型：期刊文献

英文题名：Analytical discussion on strong gravitational lensing for a massive source with a f(R) global monopole

作者：Man, Jingyun[1];Cheng, Hongbo[1]

机构：[1]E China Univ Sci & Technol, Dept Phys, Shanghai 200237, Peoples R China

年份：2015

卷号：92

期号：2

外文期刊名：PHYSICAL REVIEW D

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000357262400005)】；

基金：This work is supported by NSFC Grant No. 10875043.

语种：英文

摘要：Here we investigate the gravitational lensing in the strong field limit of a Schwarzschild black hole with a solid deficit angle owing to a global monopole within the context of the f(R) gravity theory. We obtain the expressions of the deflection angle and time delay in the forms of elliptic integrals and discuss the asymptotic behavior of the elliptic integrals to find the explicit formulas of the angle and time difference in the strong field limit. We show that the deflection angle and the time delay between multiple images are related not only to the monopole but also to the f(R) correction psi(0) by taking the cosmological boundary into account. Some observables such as the minimum impact parameter, the angular separation, the relative magnification, and the compacted angular position are estimated as well. It is intriguing that a tiny modification on standard general relativity will make a remarkable deviation on the angle and the time lag, offering a significant way to explore some possible distinct signatures of the topological soliton and the correction of Einstein's general relativity.