Weak gravitational lensing around dyonic Mod Max black hole in plasma  

作　　者：Ziyodulla Turakhonov Farruh Atamurotov Ali Ovgun Ahmadjon Abdujabbarov Sunnatillo Urinov 

机构地区：[1]Institute of Fundamental and Applied Research,National Research University TIIAME,Kori Niyoziy 39,Tashkent100000,Uzbekistan [2]Shahrisabz State Pedagogical Institute,Shahrisabz Str.10,Shahrisabz 181301,Uzbekistan [3]Tashkent State Technical University,Tashkent 100095,Uzbekistan [4]Physics Department,Eastern Mediterranean University,Famagusta,99628 North Cyprus,via Mersin 10,Turkey [5]University of Tashkent for Applied Sciences,Str.Gavhar 1,Tashkent 100149,Uzbekistan

出　　处：《Communications in Theoretical Physics》2024年第11期85-99,共15页理论物理通讯（英文版）

基　　金：partly supported by Research Grants FZ-20200929344 and F-FA-2021-510 of the Uzbekistan Ministry for Innovative Development;TUBITAK;SCOAP3 for their support。

摘　　要：In this study,we examine the effects of weak gravitational lensing and determine the shadow radius around black holes within the Dyonic ModMax(DM)spacetime,also accounting for models with nonuniform plasma distributions.By analyzing various gravitational lens models,we compare corrections to vacuum lensing due to gravitational effects within plasma and plasma inhomogeneity,finding that these effects could be observed in hot gas within galaxy clusters.Starting with the orbits of photons around a black hole in DM,we investigate the shadow and weak gravitational lensing phenomena.Utilizing observational data from the Event Horizon Telescope for M87*and SgrA*,we constrain parameters within DM gravity.To connect our findings to observations,we examine the magnification and positioning of lensed images,along with the weak deflection angle and magnification for sources near different galaxies.

关 键 词：black hole gravitational lensing modified gravity plasma medium 

分 类 号：P145.8[天文地球—天体物理] O53[天文地球—天文学]