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Title:
Dissipative formation of an elliptical galaxy
Authors:
Carlberg, R. G.
Affiliation:
AA(Toronto, University, Toronto, Canada)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 286, Nov. 15, 1984, p. 403-415. Research supported by the Natural Sciences and Engineering Research Council of Canada. (ApJ Homepage)
Publication Date:
11/1984
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
ELLIPTICAL GALAXIES, GALACTIC EVOLUTION, GAS DYNAMICS, MANY BODY PROBLEM, MOLECULAR CLOUDS, ASTRONOMICAL MODELS, DARK MATTER, ENERGY DISSIPATION, GRAVITATIONAL COLLAPSE
DOI:
10.1086/162615
Bibliographic Code:
1984ApJ...286..403C

Abstract

The formation of elliptical galaxies is modeled using a simple scheme of gas cloud collisions incorporated into a restricted N-body code. The protogalaxies are required to be largely self-gravitating in order to give rise to a strongly anisotropic model galaxy. It is then expected that the ratio of dark material to gas varies from place to place, ellipticals arising in regions where gas has been piled up to dominate the dark matter. During collapse, gas pressure exerts considerable force, which leaves observable traces in the dynamical and chemical properties of the final model galaxies. The latter are found to be generally compatible with the observed properties of elliptical galaxies.

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