The ring-shaped shadow of rotating naked singularity with a complete photon sphere
The ring-shaped shadow of rotating naked singularity with a complete photon sphere
Abstract We investigate the shadows of Konoplya-Zhidenko naked singularity. In the spacetime of Konoplya-Zhidenko naked singularity, not only can unstable retrograde light ring (LR) exist, but also unstable prograde LR, leading to the formation of a complete photon sphere (PS). Due to the absence of an event horizon, a dark …