(ICM, intracluster gas)
(hot plasma throughout a galaxy cluster)
The intracluster medium (ICM or intracluster gas) is
very hot plasma spread throughout a galaxy cluster
(most dense in the center),
typically hydrogen and helium ions at
10 to 100 megakelvins.
A cluster's total ICM mass is more than that of all
its stars, but still a fraction of the cluster's dark matter mass.
It is an X-ray source.
Referenced by pages:
star formation feedback
galaxy cluster (CL)
intergalactic medium (IGM)
Massive Cluster Survey (MACS)
Sunyaev-Zel'dovich effect (SZ effect)