Galaxies with High Radio Emissions Could be Home to Many Advanced Civilizations

belaUniverse Today8 hours ago1 Views

Centaurus A is a famous example of a relatively nearby radio galaxy. Inside the galaxy is a supermassive black hole, which generates the large jets that can be seen emerging perpendicular to the disc of the galaxy. Credit: NASA/ESO/WFI/MPIfR/APEX/CXC/CfA/A.Weiss et al.

arXiv:2508.00249v1 Announce Type: new Abstract: Any population of artificial radio broadcasts in a galaxy contributes to its integrated radio luminosity. If this radio emission is bright enough, inhabited galaxies themselves form a cosmic population of artificial radio galaxies. We can detect these broadcasts individually or set constraints from their collective emission. Using the formalism in Paper I and II, I set bounds on the artificial radio galaxy population using both of these methodol…

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