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Redshift-Distance Survey of Early-Type Galaxies. II. The [ITAL]D[/ITAL][TINF][CLC][ITAL]n[/ITAL][/CLC][/TINF]-σ Relation
R-band photometric and velocity dispersion measurements for a sample of 452 elliptical and S0 galaxies in 28 clusters are used to construct a template Dn-σ relation. This template relation is constructed by combining the data from the 28 clusters, under the assumption that galaxies in different clusters have similar properties. …