Revealing the hot intergalactic medium with ROSAT
Abstract
The X-ray background (XRB) intensity around galaxies and rich clusters of galaxies is investigated in three energy bands using the ROSAT All-Sky Survey maps. It is found that an amplitude of the XRB enhancements surrounding the Abell clusters and high density areas in the Lick galaxy counts depends on photon energy. Excess flux generated in the surroundings of the galaxy concentrations is consistent with the thermal emission by hot gas postulated by hydrodynamic simulations.
- Publication:
-
34th COSPAR Scientific Assembly
- Pub Date:
- 2002
- Bibcode:
- 2002cosp...34E2476S