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Ultraluminous Infrared Galaxy

(a galaxy emitting a more far infrared than an LIRG)

An Ultraluminous Infrared Galaxy (ULIRG) is a Galaxy emitting more than 1012 times solar Luminosity in the Far Infrared. It can be considered a type of Luminous Infrared Galaxy, i.e., having 1011 times solar luminosity in far infrared. A Hyperluminous Infrared Galaxy is a galaxy with 1013 times solar luminosity in far infrared.

A LIRG is often a Starburst Galaxy and/or has an Active Galactic Nucleus or a Quasar. A ULIRG is typically a nearby galaxy (low Redshift), and often a Merger.

(galaxy type,infrared)

Referenced by:
Hyperluminous Infrared Galaxy (HLIRG)
Luminous Infrared Galaxy (LIRG)