Kerr black hole shadows cast by extraordinary light rays with Weyl corrections  

作　　者：Songbai Chen Jiliang Jing 

机构地区：[1]Department of Physics,Institute of Interdisciplinary Studies,Key Laboratory of Low Dimensional Quantum Structures and Quantum Control of Ministry of Education,Synergetic Innovation Center for Quantum Effects and Applications,Hunan Normal University,Changsha 410081,China [2]Center for Gravitation and Cosmology,College of Physical Science and Technology,Yangzhou University,Yangzhou 225009,China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2024年第5期18-26,共9页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.12035005,12275078,11875026,and 2020YFC2201400)。

摘　　要：We investigate the equation of motion for photons with Weyl corrections in a Kerr black hole spacetime in a small coupling case.Our results show that Weyl corrections yield phenomena of birefringence.The light rays propagating in the spacetime are separated into the ordinary rays and the extraordinary rays,and the propagation of the latter depends on the corrections.We probe the effects of Weyl corrections on the Kerr black hole shadows casted by the extraordinary rays and find that such corrections result in a weak stretching or squeezing in the vertical direction for the black hole shadows.Finally,we also study the change of the length of the Near-Horizon Extremal Kerr line(NHEK line)with Weyl corrections.These features could help us to understand the electrodynamics with Weyl corrections from black hole shadows.

关 键 词：correction light STRETCHING 

分 类 号：P145.8[天文地球—天体物理]