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Environmental Effects in the Stellar Populations of Elliptical Galaxies

Published online by Cambridge University Press:  07 August 2017

J. R. Lucey
J. R. Lucey*
Affiliation:
Department of Physics, University of Durham, Science Labs., South Road, Durham, DE1 3LE, UK. (John.Lucey@durham.ac.uk)

Extract

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While early work successfully modelled the stellar population of elliptical galaxies as old, single-age, metal-rich systems, there is evidence that a small amount of recent (i.e. a few Gyrs ago) star formation has occurred in some nearby ellipticals (O'Connell, 1980; Rose, 1985; Pickles, 1985; Bica, 1988). Elliptical galaxies reside in environments ranging from the dense cores of rich clusters to isolated field regions. It has long been suggested that the global properties of ellipticals depend on environment. For example, McClure and Van den Bergh (1968) noted apparent differences in the 380-450nm colours between a set of cluster ellipticals and three from the field. Recent work has tended to support the view that the properties of ellipticals depend on environment (e.g. de Carvalho and Djorgovski, 1992). The most likely cause of these differences is the presence of a small amount of recent star formation in the field ellipticals. This environmental dependency may have important consequences for the use of ellipticals as distance indicators.

Type
Session 6: Stellar Populations in Elliptical Galaxies
Information
Symposium - International Astronomical Union , Volume 164: Stellar Populations , 1995 , pp. 281 - 287
Copyright
Copyright © Kluwer 1995 

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