The baryonic halos of isolated elliptical galaxies
  Without the interference of a number of events, galaxies may suffer in
crowded environments (e.g., stripping, harassment, strangulation); isolated
elliptical galaxies provide a control sample for the study of galaxy formation.
We present the study of a sample of isolated ellipticals using imaging from a
variety of telescopes, focusing on their globular cluster systems as tracers of
their stellar halos. Our main findings are: (a) GC color bimodality is common
even in the most isolated systems; (b) the specific frequency of GCs is fairly
constant with galaxy mass, without showing an increase towards high-mass
systems like in the case of cluster ellipticals; (c) on the other hand, the red
fraction of GCs follows the same inverted V shape trend with mass as seen in
cluster ellipticals; and (d) the stellar halos show low S\'ersic indices which
are consistent with a major merger origin.
