circumgalactic medium
(CGM)
(gas surrounding a galaxy)
The circumgalactic medium (CGM) is
the gas (and perhaps dust)
surrounding galaxies,
generally what's beyond the galactic disk but
within its virial radius.
(galaxies,gas,dust)
Further reading:
https://en.wikipedia.org/wiki/Warm%E2%80%93hot_intergalactic_medium#Circumgalactic_medium
https://ui.adsabs.harvard.edu/abs/2017ARA%26A..55..389T/abstract
http://rongmonbordoloi.com/CGM.html
Index