The (log re,μe) Plane of Hot Stellar Systems
Two families of hot stellar systems, named {it `ordinary'/} and {it 'bright'/}, are identified in the ($log R_e, mu_e$) plane built with a luminosity--limited sample of ellipticals and bulges of S0s and spirals of the Virgo and Fornax clusters. This finding, based on {it ad hoc/} new observations, is confirmed by a much larger set of literature
Capaccioli, M. et al.
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1993