Shadows and weak gravitational lensing for black holes within Einstein-Maxwell-scalar theory  

作　　者：Ahmad Al-Badawi Mirzabek Alloqulov Sanjar Shaymatov Bobomurat Ahmedov 

机构地区：[1]Department of Physics,Al-Hussein Bin Talal University,P.O.Box:20,Ma'an 71111,Jordan [2]Institute of Fundamental and Applied Research,National Research University TIIAME,Kori Niyoziy 39,Tashkent 100000,Uzbekistan [3]University of Tashkent for Applied Sciences,Str.Gavhar 1,Tashkent 100149,Uzbekistan [4]Institute for Theoretical Physics and Cosmology,Zhejiang University of Technology,Hangzhou 310023,China [5]Western Caspian University,Baku AZ1001,Azerbaijan

出　　处：《Chinese Physics C》2024年第9期234-243,共10页中国物理C（英文版）

基　　金：Supported by the National Natural Science Foundation of China(11675143);the National Key Research and Development Program of China(2020YFC2201503);the support from Research Grant F-FA-2021-432 of the Ministry of Higher Education,Science and Innovations of the Republic of Uzbekistan。

摘　　要：In this study,we investigated the optical properties of charged black holes within the Einstein-Maxwellscalar(EMS)theory.We evaluated the shadow cast by these black holes and obtained analytical solutions for both the radius of the photon sphere and that of the shadow.We observed that black hole parametersγandβboth influence the shadow of black holes.We also found that the photon sphere and shadow radius increase as a consequence of the presence of the parameterγ.Interestingly,the shadow radius decreases first and then remains unchanged owing to the impact of the parameterβ.Finally,we analyzed the weak gravitational lensing and total magnification of lensed images around black holes.We found that the charge of the black holes and the parameterβboth have a significant impact,reducing the deflection angle.Similarly,the same behavior for the total magnification was observed,also as a result of the effect of the charge of the black holes and the parameterβ.

关 键 词：Einstein Maxwell gravity shadow gravitational weak lensing 

分 类 号：P145.8[天文地球—天体物理]