Protogalaxy interactions in newly formed clusters: galaxy luminosities, colors, and intergalactic gas.
Abstract
The role of protogalaxy interactions in galactic evolution is studied during the formation of galaxy clusters. In the early stages of the collapse, coalescent encounters of protogalaxies lead to the development of a galactic luminosity function. Once galaxies acquire appreciable random motions, mutual collisions between galaxies in rich clusters will trigger the collapse of interstellar clouds to form stars. This provides both a source for enriched intracluster gas and an interpretation of the correlation between luminosity and color for cluster elliptical galaxies. Other observational consequences that are considered include optical, X-ray, and diffuse nonthermal radio emission from newly formed clusters of galaxies.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- March 1978
- DOI:
- 10.1086/155918
- Bibcode:
- 1978ApJ...220..390S
- Keywords:
-
- Galactic Clusters;
- Galactic Evolution;
- Interacting Galaxies;
- Intergalactic Media;
- Elliptical Galaxies;
- Gravitational Collapse;
- Nonthermal Radiation;
- Random Processes;
- Stellar Luminosity;
- X Ray Astronomy;
- Astrophysics;
- Clusters of Galaxies:Galaxy Formation;
- Clusters of Galaxies:Protogalaxies