Gaseous halos: implications for cluster, galaxy, and radio-source evolution.
Abstract
Substantial amounts of enriched gas produced during the early stages of galactic evolution can be stably contained within massive extended halos and released into the intracluster medium by galaxy collisions at a relatively late epoch. If most of the intracluster gas in rich clusters originates in this manner, the onset of ram-pressure stripping can be delayed until z is no more than about 0.5. Prior to this, such clusters contain many spiral and gas-rich elliptical galaxies, thereby accounting for the unusually large proportion of blue galaxies found in distant clusters. Implications are drawn for X-ray observations of rich clusters and for the morphology of extended extragalactic radio sources.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- October 1979
- DOI:
- 10.1086/183064
- Bibcode:
- 1979ApJ...233L...1N
- Keywords:
-
- Cosmic Gases;
- Galactic Clusters;
- Galactic Evolution;
- Halos;
- Intergalactic Media;
- Radio Sources (Astronomy);
- Collisions;
- Elliptical Galaxies;
- High Temperature Gases;
- Thermal Stability;
- Astrophysics;
- Clusters of Galaxies:Evolution;
- Clusters of Galaxies:Intracluster Gas;
- Galactic Halos;
- Galaxies:Evolution;
- Radio Sources:Morphology