Wormholes with tuned throat parameters can produce the same shadow and silhouette radii as Schwarzschild black holes but yield brighter accretion disk images dominated by Doppler boosting rather than gravitational redshift.
Of primary interest for our purposes is the existence of stable circular orbits, since they provide the foundation for a thin accretion disk
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Image of a wormhole with an arbitrary throat profile
Wormholes with tuned throat parameters can produce the same shadow and silhouette radii as Schwarzschild black holes but yield brighter accretion disk images dominated by Doppler boosting rather than gravitational redshift.