Astrophysics (index)about

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. Such excess Emission has been observed in Radio, Infrared, Visible Light, X-ray, and Gamma Rays bands. The nucleus is called an Active Galactic Nucleus.

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


(galaxy type)
http://www.astro.virginia.edu/~jh8h/glossary/activegalaxy.htm

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

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