Astrophysics (index)

Intergalactic Medium

(IGM)
(matter between galaxies)

The Intergalactic Medium (IGM) is matter such as Cosmic Dust and gas between galaxies. Similar matter between stars within a galaxy is called the Interstellar Medium (ISM). Between galaxies it is often Plasma in filaments, mostly ionized Hydrogen (H).

The IGM can heat to 10*5 to 10*7 K, called the warm-hot intergalactic medium (WHIM), observed in Ultraviolet (UV) and low-energy X-ray radiation.

The Intracluster Medium (ICM) has a similar meaning, but more specifically means the medium within a Galaxy Cluster (CL).


(galaxies,gas,dust)
http://en.wikipedia.org/wiki/Intergalactic_medium

Referenced by:
Cold Gas
Filament
Fast Radio Burst (FRB)
Galaxy
Galaxy Cluster (CL)
Gunn-Peterson Trough
Interplanetary Medium (IPM)
Interstellar Medium (ISM)
Lyman-Alpha Forest
Plasma
Ram Pressure

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