Journal
CRAL-2010: A UNIVERSE OF DWARF GALAXIES
Volume 48, Issue -, Pages 231-236Publisher
E D P SCIENCES
DOI: 10.1051/eas/1148052
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Dwarf elliptical galaxies are frequently excluded from bright galaxy samples because they do not follow the same linear relations in diagrams involving effective half light radii, R-e, or mean effective surface brightnesses, (e). However, using two linear relations which unite dwarf and bright elliptical galaxies we explain how these lead to curved relations when one introduces either R-e or (e). In particular, the curved (e) - R-e relation is derived here. This and other previously misunderstood curved relations, once heralded as evidence for a discontinuity between faint and bright elliptical galaxies at M-B approximate to -18 mag, actually support the unification of such galaxies as a single population whose structure (i.e. stellar concentration) varies continuously with stellar luminosity and mass.
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