submillimeter galaxy

English

Alternative forms
  • submillimetre galaxy

Etymology

submillimeter +‎ galaxy. From being a high-redshift galaxy whose emissions are primarily submillimetre-wave radiation (terahertz-radiation (T-wave/T-ray); electromagnetic radiation with wavelengths longer than infrared and shorter than microwave/radiowave).

Noun

submillimeter galaxy (plural submillimeter galaxies)

  1. (astronomy) A type of starburst galaxy that primarily emits radiation in the sub-mm/T-hertz range. Due to the extreme dustiness of the galaxy, they are visible mostly in infrared emissions at their redshift, which are subsequently redshifted into the submm/THz range by Hubble expansion.

Hypernyms

Coordinate terms
  • compact elliptical galaxy / compact elliptical (cE/CEG) (the type of galaxy that submillimeter galaxies evolve into, at lower redshifts (z))
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