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The Age of Elliptical Galaxies in Clusters

  • Bodo Ziegler
  • Ralf Bender
Conference paper
Part of the International Astronomical Union / Union Astronomique Internationale book series (IAUS, volume 171)

Abstract

Nearby cluster ellipticals follow a very tight relation between velocity dispersion σ and Mg absorption (e.g. Bender et al. 1993, ApJ 411, 153). The small scatter in Mg implies that the age and metallicity spread at a given σ in ellipticals is smaller than 15% (applying Worthey’s population synthesis models 1994, ApJ S 95, 107). This means that ellipticals cannot have formed continuously over the Hubble time and ongoing merger processes represent only a tail of latecomers.

Copyright information

© Springer Science+Business Media Dordrecht 1996

Authors and Affiliations

  • Bodo Ziegler
    • 1
  • Ralf Bender
    • 1
  1. 1.UniversitätssternwarteMünchenGermany

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