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.
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© 1996 Springer Science+Business Media Dordrecht
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Ziegler, B., Bender, R. (1996). The Age of Elliptical Galaxies in Clusters. In: Bender, R., Davies, R.L. (eds) New Light on Galaxy Evolution. International Astronomical Union / Union Astronomique Internationale, vol 171. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-0229-9_184
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DOI: https://doi.org/10.1007/978-94-009-0229-9_184
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