In the unified model of active galactic nuclei, the broad line region in an active galactic nucleus is

Question

Quizplus · Accepted Answer

The unified model of active galactic nuclei proposes that the broad line region consists of clouds of gas and stars in close proximity to a supermassive black hole. These clouds are believed to be moving at very high orbital velocities, which produces the broad emission lines seen in Type 1 Seyfert galaxies. Type 2 Seyfert galaxies exhibit narrow absorption lines, which are produced by gas and dust located further from the central black hole. The unified model of active galactic nuclei suggests that the broad line region is made up of clouds of gas and stars orbiting around a supermassive black hole. These clouds emit broad emission lines in response to the intense radiation from the vicinity of the black hole.

In the Unified Model of Active Galactic Nuclei, the Broad