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gr-qc2022
Multi-ring images of thin accretion disk of a regular naked compact object
Merce Guerrero, Gonzalo J. Olmo, Diego Rubiera-Garcia +1
We discuss the importance of multi-ring images in the optical appearance of a horizonless spherically symmetric compact object, when illuminated by an optically thin accretion disk…
gr-qc2022
Light ring images of double photon spheres in black hole and wormhole space-times
Merce Guerrero, Gonzalo J. Olmo, Diego Rubiera-Garcia +1
The silhouette of a black hole having a critical curve (an unstable bound photon orbit) when illuminated by an optically thin accretion disk whose emission is confined to the equat…