Scaling relations for globular cluster systems in early-type galaxies
  The formation and growth of globular cluster systems (GCSs) is closely
related to the evolutionary processes experienced by their host galaxies. In
particular, their radial distributions scale with several properties of the
galaxies and their halos. We performed a photometric study, by means of HST/ACS
archival data of several intermediate luminosity galaxies located in low
density environments. It was supplemented with available photometric data of
GCSs from the Virgo and Fornax clusters, resulting in a sample of almost 30
GCSs for which we fitted their radial profiles. The resulting overall
properties agree with those from previous studies, as we found that the
effective radius, extension and concentration of the GCS radial profiles
correlate with the stellar mass, effective radius and number of globular
clusters, presenting in some cases a bilinear relation. The extension also
correlates with the central velocity dispersion for central galaxies, but not
for satellites. From a statistical comparison with numerical simulations we
obtained good agreement between the effective radius and extension of the GCS
scale with the effective and virial radius of the halos, respectively. Finally,
we analysed these results in the literature context.
