Astrophysics (index)

Active Galaxy

(galaxy with an active, i.e., extremely luminous central region)

An Active Galaxy is a Galaxy whose central region has a very high Luminosity (L). Such excess Emission has been observed in Radio, Infrared (IR), Visible Light, X-ray, and Gamma Rays wave bands. The nucleus is called an Active Galactic Nucleus (AGN).

The radiation is assumed to be due to Accretion of mass by a Supermassive Black Hole (SMBH). Often associated with a nucleus is a relativistic Jet.

(galaxy type)

Referenced by:
Active Galactic Nucleus (AGN)
Canadian Institute for Theoretical Astrophysics (CITA)
Extended Chandra Deep Field-South Survey (ECDFS)
Gas Flow
Radio Galaxy (RG)
Seyfert Galaxy