Phys. Rev. D 104, 124010 (2021)
Observational signature and additional photon rings of an asymmetric thin-shell wormhole
Jun Peng2,†, Minyong Guo3,‡, and Xing-Hui Feng1,*
1 Center for Joint Quantum Studies and Department of Physics, School of Science, Tianjin University, Tianjin 300350, China
2 Van Swinderen Institute, University of Groningen, 9747 AG Groningen, Netherlands
3 Center for High Energy Physics, Peking University, Beijing 100871, China
† jun.peng@rug.nl
‡ minyongguo@pku.edu.cn
* xhfeng@tju.edu.cn
Abstract
Recently, a distinct shadow mechanism was proposed by Wang et al. from the asymmetric thin-shell wormhole (ATW) [X. Wang et al., Phys. Lett. B 811, 135930 (2020)]. On the other hand, Gralla, Holz, and Wald’s work [Phys. Rev. D 100, 024018 (2019)] represented a nice description of photon rings in the presence of an accretion disk around a black hole. In this paper, we are inspired to thoroughly investigate the observational appearance of an accretion disk around the ATW. Although the spacetime outside an ATW with a throat could be identical to that containing a black hole with its event horizon, we show evident additional photon rings from the ATW spacetime. Moreover, a potential lensing band between two highly demagnified photon rings is found. Our analysis provides an optically observational signature to distinguish ATWs from black holes.
