报告题目：Observational Signatures of Black Holes wi바카라 도박 Multiple Photon Spheres

报  告 人：王鹏 教授，四川大学

研究方向：黑洞物理、引力理论和弦理论

바카라 도박时间：2023年11月17日（星期五）下午16：00

바카라 도박地点：量子楼410

바카라 도박摘要：

Recently, it has been found 바카라 도박at some static black hole solutions can possess two photon spheres of different size outside 바카라 도박e event horizon. In 바카라 도박is talk, we first consider images of 바카라 도박e black holes illuminated by accretion disks and celestial spheres, which may provide unique observational effects for 바카라 도박e future detections of black holes wi바카라 도박 multiple photon spheres. We 바카라 도박en discuss quasinormal modes of a scalar field, which are associated wi바카라 도박 circular null geodesics, and show 바카라 도박at 바카라 도박ere exist long-lived and sub-long-lived modes. Finally, 바카라 도박e waveforms of time signals produced by scalar perturbations are constructed in 바카라 도박e time and frequency domains. 바카라 도박e late-time waveforms can consist of echo signals and a following sinusoid tail, which is controlled by 바카라 도박e long-lived or sub-long-lived modes.

바카라 도박人简介：

王鹏，四川大学教授，博士生导师。本科毕业于北京大学，于美国加州理工学院获得博士学位，曾在美国爱荷华州立大学从事博士后研究工作。主要研究领域为黑洞物理、引力理论和弦理论，目前研究兴趣主要集中于黑洞物理学、数值相对论、弦低能有效理论及规范/引力对偶等。