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In this paper, we present a model of the formation and chemical enrichment of elliptical galaxies that differs from the conventional picture in two fundamental ways. Ellipticals do not form in a single monolithic collapse and burst of star formation at high redshift. Instead, most of their stars form at modest rates in disc galaxies, which then merge to form the ellipticals. Galaxies do not underg...

Chemical enrichment and the origin of the colour—magnitude relation of elliptical galaxies in a hierarchical merger model