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报告题目Black Holes with Multiple Photon SpheresA15AB

报告人王鹏 教授(四川大学)




Recent discoveries have revealed the existence of static black hole solutions harboring two photon spheres of distinct sizes outside the event horizon. This talk explores the potential observational signatures and (in)stabilities of these black holes. We begin by investigating the imaging of such black holes, highlighting the unique effects that future detections might exhibit. Subsequently, we focus on quasinormal modes of a scalar field associated with circular null geodesics. We demonstrate the presence of both long-lived and sub-long-lived modes, which can contribute to the echo signals observed in the late-time waveforms. Finally, the discussion concludes with an exploration of superradiant instabilities and the nonlinear stability of these multi-photon sphere black holes.



附件【天津大学-Black Holes with Multiple Photon Spheres.pdf已下载

天津大学理学院 量子交叉研究中心   地址:天津津南区 雅观路135号 天津大学北洋园校区32楼146 
Center for Joint Quantum Studies, School of Science, Tianjin University     Address : Yaguan Road 135, Jinnan District, 300350 Tianjin, P. R. China