We analyze accretion onto CCEGA black stars — ultracompact objects in the mass range 4. 56–14. 75 M☉ without event horizon. The physical surface at ρc modifies the accretion efficiency, disk structure, and thermal emission relative to GR black holes. Key predictions: (1) no quiescence — the surface provides a stable energy sink; (2) absent radio jets — surface emission quenches jet formation; (3) absent Type I X-ray bursts — surface temperature too high for hydrogen accumulation; (4) modified disk truncation radius. These four simultaneous properties distinguish black stars from both neutron stars and GR black holes observationally.
Marc López Sánchez (Sat,) studied this question.