Photon orbits and phase transition for Letelier AdS black holes immersed in perfect fluid dark matter

作     者：Ashima Sood Md Sabir Ali J.K.Singh Sushant G.Ghosh Ashima Sood;Md Sabir Ali;J.K.Singh;Sushant G.Ghosh

作者机构：Department of MathematicsNetaji Subhas University of TechnologyNew Delhi-110078India Centre for Theoretical PhysicsJamia Millia IslamiaNew Delhi 110025India Department of PhysicsMahishadal Raj CollegePurba MedinipurWest Bengal721628India Institute of Theoretical Physics&Research Center of GravitationLanzhou UniversityLanzhou 730000China Key Laboratory of Quantum Theory and Applications of MoELanzhou UniversityLanzhou 730000China Lanzhou Center for Theoretical Physics&Key Laboratory of Theoretical Physics of Gansu ProvinceLanzhou UniversityLanzhou 730000China Astrophysics and Cosmology Research UnitSchool of MathematicsStatistics and Computer ScienceUniversity of KwaZulu-NatalPrivate Bag X54001Durban 4000South Africa 

出 版 物：《Chinese Physics C》 (中国物理C（英文版）)

年 卷 期：2024年第48卷第6期

页      面：247-259页

核心收录：

学科分类：07[理学] 070401[理学-天体物理] 0704[理学-天文学] 

基　　金：Supported by the National Natural Science Foundation of China(11875151,12347177,12247101) the 111 Project under(B20063) the Lanzhou City's Scientific Research Funding Subsidy to Lanzhou University 

主　　题：AdS black holes perfect fluid dark matter Letelier spacetime photon orbit extended phase space thermodynamics correlation of photon orbit and thermodynamics 

摘      要：We obtain an exact solution for spherically symmetric Letelier AdS black holes immersed in perfect fluid dark matter(PFDM).Considering the cosmological constant as the positive pressure of the system and volume as its conjugate variable,we analyze the thermodynamics of our black holes in the extended phase *** to the background clouds of strings parameter(a)and the parameter endowed with PFDM(β),we analyze the Hawking temperature,entropy,and specific ***,we investigate the relationship between the photon sphere radius and phase transition for the Letelier AdS black holes immersed in *** the analysis,with a particular condition,non-monotonic behaviors are found between the photon sphere radius,impact parameter,PFDM parameter,temperature,and *** can regard the changes in both the photon sphere radius and impact parameter before and after phase transition as the order parameter;their critical exponents near the critical point are equal to the same value,1/2,similar to that in ordinary thermal *** indicates that a universal relation of gravity may exist near the critical point for a black hole thermodynamic system.