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Multi-level images around Kerr-Newman black holes

SourceSeminar Date of Publication:Jun 09,2022
06/09 2022 Seminar
  • Title Multi-level images around Kerr-Newman black holes
  • Speaker 闫浩鹏 (北京大学)
  • Date 2022年6月9日 15:00
  • Venue 腾讯会议链接 南楼6509
  • Abstract
    In this talk, I will talk about the lensing effects of Kerr-Newman (KN) black holes and the multi-level images of luminous sources around the black holes. I will first introduce the analytic forms of the lens equations in KN spacetime before introducing the limiting forms of these lens equations for photon emissions near the bounded photon orbits. Meanwhile, I will introduce the three key parameters γ, δ and τ, which respectively correspond to the demagnification, rotation and time delay between successive images. Then I will discuss the primary, the secondary and the higher-order images of spherical sources and equatorial disk-like sources. I will end up with some closing remarks.
    简介:闫浩鹏于2017年在北京师范大学获硕士学位,导师刘文彪教授,2020年在哥本哈根大学获博士学位,导师Niels Obers教授,目前在北京大学高能中心做博士后研究工作,合作导师陈斌教授。他的研究兴趣为引力与黑洞物理,目前主要关注与黑洞照片相关的理论问题。