Statistics – Computation
Scientific paper
Aug 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989ap%26ss.158..197b&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 158, no. 2, Aug. 1989, p. 197-204.
Statistics
Computation
1
Computational Astrophysics, Galactic Clusters, Galactic Evolution, Galactic Mass, Equations Of Motion, Galactic Structure, Gravitational Fields
Scientific paper
The formation of massive galaxies at the center of a cluster is discussed here. The protogalaxies move with both rotatinn and random velocities through the gaseous medium pervading the cluster. Each galaxy is supposed to move through a resisting medium under the general gravitational field produced by the cluster as a whole. Also, the mass of the galaxy increases by accretion all the time as it moves through the medium. Using plausible laws for density of the medium and accretion of matter and solving equation of motion, we find that the galaxy loses angular momentum in the course of the time. The loss of angular momentum drives the galaxy towards the center of the cluster. Thus, over a sufficiently long time-scale, several galaxies may merge in the central region of the cluster resulting in a single massive galaxy. The process can drive rise to several massive galaxies in the central region of the cluster.
Basu Baidyanath
Bhattacharyya Tara
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