Dyson Spheres Around Black Holes: Energy Harvest, Emission Signatures, and Archival Sky Survey Searches
To the point
Freeman Dyson’s idea is extended to a black hole, imagining a Dyson sphere or ring that harvests energy from the black hole’s accretion disk and jets, reemits it at longer wavelengths to avoid overheating, and could be detectable via infrared or ultraviolet signatures in sky surveys.
