On the Dichotomy between Normal and Dwarf Ellipticals
  Using images from the SDSS DR13 library, we examine the structural properties
of 374 bright (classed E0 to E6) and dwarf ellipticals (classed dE(nN) to
dE(N)). The sample combines a multicolor sample of bright ellipticals (252
galaxies with $M_g < -20$) with a new sample of faint ellipticals (60 galaxies
with $M_g > -20$) which overlaps the dwarf elliptical sample (62 galaxies) in
luminosity and size. The faint ellipticals extend the linear structural
correlations found for bright ellipticals into parameter space not occupied by
dwarf ellipticals indicating a dichotomy exists between the two types. In
particular, many faint ellipticals have significantly higher effective surface
brightnesses compared to dE's which eliminates any connection at a set stellar
mass. Template analysis of the three subsets of ellipticals demonstrates that
the bright and faint ellipticals follow the same trends of profile shape (weak
homology), but that dwarf ellipticals form a separate and distinct structural
class with lower central surface brightnesses and extended isophotal radii.
