Effect of null aether field on weak deflection angle of black holes  

作　　者：A.Övgün İ.Sakallı J.Saavedra 

机构地区：[1]Physics Department,Faculty of Arts and Sciences,Eastern Mediterranean University,99628 Famagusta,North Cyprus,via Mersin 10,Turkey [2]Instituto de Física,Pontificia Universidad Católica de Valparaíso,Casilla 4950,Valparaíso,Chile

出　　处：《Chinese Physics C》2020年第12期234-239,共6页中国物理C（英文版）

摘　　要：We study light rays in the static and spherically symmetric gravitational field of the null aether theory(NAT).To this end,we employ the Gauss-Bonnet theorem to compute the deflection angle formed by a NAT black hole in the weak limit approximation.Using the optical metrics of the NAT black hole,we first obtain the Gaussian curvature and then calculate the leading terms of the deflection angle.Our calculations indicate how gravitational lensing is affected by the NAT field.We also illustrate that the bending of light stems from global and topological effects.

关 键 词：deflection of light Gauss-Bonnet theorem gravitational lensing black hole null aether theory 

分 类 号：P145.8[天文地球—天体物理]