Shadows and observation intensity of black holes in the Randall–Sundrum brane world model  

作　　者：Ke-Jian He Xiao Zhang Xin Li 何柯腱;张骁;李昕(Department of Physics and Chongqing Key Laboratory for Strongly Coupled Physics Chongqing University,Chongqing 401331,China;Hongshen Honors School,Chongqing University,Chongqing 401331,China)

机构地区：[1]Department of Physics and Chongqing Key Laboratory for Strongly Coupled Physics Chongqing University,Chongqing 401331,China [2]Hongshen Honors School,Chongqing University,Chongqing 401331,China

出　　处：《Chinese Physics C》2022年第7期212-219,共8页中国物理C（英文版）

基　　金：Supported by the National Natural Science Fund of China (11775038, 12047564)

摘　　要：The shadow and observation intensity of a black hole surrounded by a thin spherical accretion in the Randall–Sundrum brane world model are investigated.The bulk metric depends on the tidal charge parameter,q,and deformation parameter,C.It reduces to the metric that possesses similar form with the Reissner–Nordström metric if C=0.It is shown that the radius of the photon sphere of this black hole depends only on the tidal charge parameter.The radius of the photon sphere decreases with higher q.The observation intensity is mainly influenced by the tidal charge parameter,q,and the deformation parameter,C,is of secondary importance.In the optical observation,the black holes appear brighter with higher q or lower C.

关 键 词：SHADOWS observation intensity Randall-Sundrum brane 

分 类 号：P145.8[天文地球—天体物理]