Among astronomers, the accepted explanation for the active nucleus in NGC 5548 is the accretion of matter onto a supermassive black hole (SMBH) at the core. This object is surrounded by an orbiting disk of accreted matter drawn in from the surroundings.
In astronomy, the prevailing explanation for the active nucleus of NGC 5548 is that it's formed by matter accumulating around a supermassive black hole (SMBH) at its center. This black hole is surrounded by a disk of material pulled in from the surroundings.