gas question

[Bartosz Lew]

this might be a bit off topic but still interesting...

Is it correct that intergalactinc gas, made of relativistic electrons,
seen in X-rays by bremstrahlung rediation caused by collisions with DM
particles, comes originally from galaxies, where the electrons are
accelerated in galactic magnetic fields and SN explosions and then some of
them escape the galactic grawitation ?



bartek