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The Shapes and Ages of Elliptical Galaxies

Published online by Cambridge University Press:  25 May 2016

Roelof S. de Jong  and
Roger L. Davies
Roelof S. de Jong
Affiliation:
University of Durham, Department of Physics, South Road, Durham DH1 3LE, UK
Roger L. Davies
Affiliation:
University of Durham, Department of Physics, South Road, Durham DH1 3LE, UK

Extract

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Normally elliptical galaxies are thought to be old, evolved systems, but recently a controversy has arisen over the age of ellipticals. Measurements by Gonzáles (1993, Ph.D. thesis, UCSC) show that the Hβ absorption indices of ellipticals span a range of values. Population synthesis models indicate that the Hβ index is a good age indicator and hence, contrary to normal perception, the ages of ellipticals seem to span a range of values.

Type
Poster Papers
Information
Symposium - International Astronomical Union , Volume 171: New Light on Galaxy Evolution , 1996 , pp. 359
Copyright
Copyright © Kluwer 1996