Globular Cluster Systems and their Host Galaxies: Comparison of Spatial
  Distributions and Colors
  We present a study of the spatial and color distributions of four early-type
galaxies and their globular cluster (GC) systems observed as part of our
ongoing wide-field imaging survey. We use $BVR$ KPNO-4m+MOSAIC imaging data to
characterize the galaxies' GC populations, perform surface photometry of the
galaxies, and compare the projected two-dimensional shape of the host galaxy
light to that of the GC population. The GC systems of the ellipticals NGC 4406
and NGC 5813 both show an elliptical distribution consistent with that of the
host galaxy light. Our analysis suggests a similar result for the giant
elliptical NGC 4472, but a smaller GC candidate sample precludes a definite
conclusion. For the S0 galaxy NGC 4594, the GCs have a circular projected
distribution, in contrast to the host galaxy light which is flattened in the
inner regions. For NGC 4406 and NGC 5813 we also examine the projected shapes
of the metal-poor and metal-rich GC subpopulations and find that both
subpopulations have elliptical shapes that are consistent with those of the
host galaxy light. Lastly, we use integrated colors and color profiles to
compare the stellar populations of the galaxies to their GC systems. For each
galaxy, we explore the possibility of color gradients in the individual
metal-rich and metal-poor GC subpopulations. We find statistically significant
color gradients in both GC subpopulations of NGC 4594 over the inner $\sim 5$
effective radii ($\sim 20$ kpc). We compare our results to scenarios for the
formation and evolution of giant galaxies and their GC systems.
