Thermal fluctuations,deflection angle,and greybody factor of a high-dimensional Schwarzschild black hole in scalar-tensor-vector gravity  

作　　者：Qian Li Yu Zhang Qi-Quan Li Qi Sun 

机构地区：[1]Faculty of Science,Kunming University of Science and Technology,Kunming,Yunnan 650500,China

出　　处：《Communications in Theoretical Physics》2024年第11期100-112,共13页理论物理通讯（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant No.12065012);Yunnan Fundamental Research Projects (202301AS070029);Yunnan High-Level Talent Training Support Plan Young&Elite Talents Project (Grant No.YNWR-QNBJ-2018-360)。

摘　　要：In this study,we examined the thermal fluctuations,deflection angle,and greybody factor of a high-dimensional Schwarzschild black hole in scalar-tensor-vector gravity(STVG).We calculated some thermodynamic quantities related to the correction of the black hole entropy caused by thermal fluctuations and discussed the effect of the correction parameters on these quantities.By analyzing the changes in the corrected specific heat,we found that thermal fluctuations made the small black hole more stable.It is worth noting that the STVG parameter did not affect the thermodynamic stability of this black hole.Additionally,by utilizing the Gauss-Bonnet theorem,the deflection angle was obtained in the weak field limit,and the effects of the two parameters on the results were visualized.Finally,we calculated the bounds on the greybody factor of a massless scalar field.We observed that as the STVG parameter around the black hole increased,the weak deflection angle became larger,and more scalar particles can reach infinity.However,the spacetime dimension has the opposite effect on the STVG parameter on the weak deflection angle and greybody factor.

关 键 词：black hole thermal fluctuations deflection angle greybody factor 

分 类 号：P145.8[天文地球—天体物理]