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Determination of Young Population Ages in Cluster Galaxies

Published online by Cambridge University Press:  07 August 2017

B.M. Poggianti  and
G. Barbaro
B.M. Poggianti
Affiliation:
Department of Astronomy, vicolo dell'Osservatorio 5, 35122 Padova – Italy
G. Barbaro
Affiliation:
Department of Astronomy, vicolo dell'Osservatorio 5, 35122 Padova – Italy

Extract

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The “Butcher–Oemler” effect was originally defined as the excess of blue galaxies observed in distant rich clusters when compared to local counterparts. Subsequent observations revealed that a larger fraction of objects in clusters between 0.1 < z < 1 show signs in their spectra of the presence of young stars, i.e. of a recent (during the last 2 Gyrs) or current burst of star formation.

Type
Poster Papers
Information
Symposium - International Astronomical Union , Volume 164: Stellar Populations , 1995 , pp. 460
Copyright
Copyright © Kluwer 1995