The unified model of AGN suggests that quasars, Seyfert galaxies, and radio galaxies:
A) are unrelated, although they are all very luminous galaxies at radio wavelengths
B) are powered by similar mass accretion rates onto supermassive black holes
C) are driven by violent mergers of two gas-rich spiral galaxies
D) are similar phenomena but viewed from different orientation angles
E) are all powered by high rates of star formation and supernova explosions

Question

Quizplus · Accepted Answer

The unified model of AGN proposes that quasars, Seyfert galaxies, and radio galaxies are fundamentally the same type of object, with differences in their observed properties arising from the angle at which we view them relative to their accretion disks and obscuring material.

The Unified Model of AGN Suggests That Quasars, Seyfert Galaxies