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AGN Characteristics

Processes found in Active Galaxies include:

Synchrotron Radiation

Emission lines

Galaxies with active nuclei (AGN), classically exhibit all or most of the following characteristics:

  1. High luminosity, greater than 1037 W
  2. Nonthermal radio source (synchrotron) with excessive UV, IR, radio, and X- ray flux as compared to an ordinary galaxy
  3. Small region of rapid variability, exhibiting significant variations over time periods of months or less, in the galactic nucleus
  4. High brightness in nuclear region as compared to other regions of the galaxy
  5. Jet-like protuberances
  6. Broad emission lines (sometimes)

The central region of the Milky Way galaxy has several of these characteristics, although the total energy output is well below that generally expected for an AGN.


If you have a question about the GTN, please contact one of the "Responsible SSU Personnel" below.

This page was last modified on Friday 30th January 2009 @ 15:17pm

Science Mission Directorate Universe Division

Responsible SSU Personnel:

Dr. Kevin McLin (mclin at universe dot sonoma dot edu)

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