The ring-shaped shadow of a rotating naked singularity with a complete photon sphere -

\begin{document}$ |\eta| $\end{document} increases. Moreover, stable LRs and stable photon spherical orbits can exist in the Konoplya-Zhidenko naked singularity spacetime, but they have no effect on the image of the naked singularity. This study demonstrates that a rotating naked singularity can exhibit not only an arc-shaped shadow but also a ring-shaped shadow."> The ring-shaped shadow of a rotating naked singularity with a complete photon sphere -

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