近日，重庆大学物理学院的何柯腱及其研究小组与广西大学的郭森以及西华师范大学的李国平合作并取得一项新进展。经过不懈努力，他们对具有巴丁剖面的非对称薄壳虫洞的观测外观和额外光子环进行研究。相关研究成果已于2024年6月15日在国际知名学术期刊《中国物理C》上发表。

本文研究了具有巴丁剖面的非对称薄壳虫洞的光学外观。首先，研究人员需要利用Visser提出的剪切-粘贴技术构建一个非对称薄壳虫洞，然后确定其相关物理量，如光子球半径和不同磁荷g值下的临界碰撞参数。随后，他们在具有巴丁剖面的非对称薄壳虫洞框架内研究光子的有效势和运动行为。结果表明，薄壳虫洞的有效势、射线轨迹和方位角与黑洞质量比有较强的相关性。

考虑吸积盘作为唯一的背景光源，研究人员观察到与巴丁黑洞相比，具有巴丁剖面的非对称薄壳虫洞在光学外观上有额外的光子环和透镜带。研究人员可以发现，随着磁荷g的增强，这些特定附加光带的尺寸也随之增大，这与黑洞的特性形成鲜明对比。这些异常明亮的环成为了识别和表征薄壳虫洞时空的可靠判据。

附：英文原文

Title: Observational appearance and extra photon rings of an asymmetric thin-shell wormhole with a Bardeen profile

Author: Ke-Jian He, Zhi Luo, Sen Guo, Guo-Ping Li

Issue&Volume: 2024-06-15

Abstract: In this work, the optical appearance of an asymmetric thin-shell wormhole with a Bardeen profile is studied. To initiate the process, we need to construct an asymmetric thin-shell wormhole utilizing the cut-and-paste technique proposed by Visser and subsequently ascertain its pertinent physical quantities such as the radius of the photon sphere and critical impact parameters for different values of magnetic charge g. Then, the effective potential and motion behavior of photons are also investigated within the framework of asymmetric thin-shell wormholes with a Bardeen profile. It can be found that the effective potential, ray trajectory, and azimuthal angle of the thin-shell wormhole exhibit a strong correlation with the mass ratio of black holes. By considering the accretion disk as the sole background light source, we observe additional photon rings and lensing bands in the optical appearance of the asymmetric thin-shell wormhole with a Bardeen profile compared to those exhibited by the Bardeen black hole. One can find that there is an increase in the size of the specific additional light bands with increasing magnetic charge g, which is different from the black hole case. These exceptionally luminous rings can serve as a robust criterion for the identification and characterization of the thin-shell wormhole spacetime.

DOI: 10.1088/1674-1137/ad34bf

Source: http://hepnp.ihep.ac.cn/article/doi/10.1088/1674-1137/ad34bf