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Are Cluster Ellipticals Formed by Mergers?

Published online by Cambridge University Press:  03 August 2017

G.A. Mamon  and
D Gerbal
G.A. Mamon
Affiliation:
DAEC, Observatoire de Meudon F-92195 Meudon Cedex, FRANCE
D Gerbal
Affiliation:
DAEC, Observatoire de Meudon F-92195 Meudon Cedex, FRANCE

Extract

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A major argument against forming ellipticals by mergers is that the large velocity dispersions of clusters preclude slow enough encouters that may lead to mergers (Ostriker 1980). We show below that the observed morphology-density relation in clusters (Postman & Geller 1984) is consistent with the formation of cluster ellipticals by mergers, using a simple “chemical evolution” calculation embedded in the standard spherical cosmological infall scenario.

Type
XI- Galaxy Evolution
Information
Symposium - International Astronomical Union , Volume 146: Dynamics of Galaxies and their Molecular Cloud Distributions , 1991 , pp. 376
Copyright
Copyright © Kluwer 1991