Detection of X-ray emission from distant clusters of galaxies.
Abstract
The paper reports the first extensive detection of X-ray emission from clusters of galaxies at cosmological distances. The properties of these objects are similar to those observed in objects at low redshifts. The 0.5-4.5 keV luminosities are in the range of less than 1 x 10 to the 43rd to 2 x 10 to the 45th ergs/s; the core radii are on the order of 0.5 Mpc; and Bautz-Morgan type I clusters are more luminous than types II or III. The observations are consistent with models assuming an evolving cluster potential and moderately efficient galaxy formation, but do not require them when observational selection is considered. X-ray observations of the 3C 295 cluster indicate that there is sufficient intergalactic medium to cause stripping of the cluster spirals, but the colors of these galaxies imply that they have not been stripped. A possible explanation of this discrepancy is discussed.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- November 1979
- DOI:
- 10.1086/183101
- Bibcode:
- 1979ApJ...234L..15H
- Keywords:
-
- Galactic Clusters;
- Radiation Detectors;
- X Ray Sources;
- Astrophysics;
- Galactic Evolution;
- Luminosity;
- Red Shift;
- Astrophysics;
- Clusters of Galaxies:Evolution;
- Clusters of Galaxies:X Rays