Observational appearances of hairy black holes in the framework of gravitational decoupling

作     者：Yizhi Liang Xin Lyu Jun Tao 

作者机构：Center for Theoretical PhysicsCollege of PhysicsSichuan UniversityChengdu 610065China 

出 版 物：《Communications in Theoretical Physics》 (理论物理通讯（英文版）)

年 卷 期：2024年第76卷第8期

页      面：103-117页

核心收录：

学科分类：07[理学] 070401[理学-天体物理] 070402[理学-天体测量与天体力学] 0704[理学-天文学] 

基　　金：supported by the National Natural Science Foundation of China (NSFC) with grant nos 12175212  12275183 and 12275184 

主　　题：hairy black hole shadow gravitational decoupling accretion disk 

摘      要：We investigate the observational appearance of static and spherically symmetric hairy black holes in the framework of gravitational decoupling with the weak energy condition(WEC). Two types of thin illumination conditions are studied: spherical accretion and disk accretion. As the hairy parameter increases, the size of the photon sphere and photon rings in both models decreases, and the overall luminosity attenuation becomes more pronounced. In spherical accretion, the luminosity of infalling accretion is significantly lower than that of stationary accretion. In disk accretion the luminosity of the black hole is contributed by direct emission, the lensing ring and the photon ring. Employing four types of astrophysical disk luminosity model,we investigate the appearance of halos and note that their luminosities do not superimpose when the source is on or beyond the innermost stable circular orbit.