Isolated ellipticals and their globular cluster systems I: Washington
  photometry of NGC 3585 and NGC 5812
  The globular cluster (GC) systems of isolated elliptical galaxies have only
recently begun to be studied in detail, and may exhibit morphological
connections to the evolutionary histories of their hosts. Here we present the
first in a series of wide-field analyses of the GC systems of the isolated
ellipticals - Washington C and R photometry of NGC 3585 and NGC 5812 down to
~24 mag. The GC systems are characterised, with each system displaying both the
"Universal" blue peak at (C-R)~1.3, and a red peak, but each with differing
strengths. The total number of GCs in each system, and their specific
frequencies, are estimated. The GC colours and specific frequencies are highly
indicative that the host galaxy environment plays a role in shaping its GC
system. We produce, and subtract, accurate models of each galaxy, revealing
interesting underlying features, including the first definitive evidence that
NGC 5812 is interacting with a dwarf companion galaxy. From the galaxy models
we also determine surface brightness and colour profiles. Both colour profiles
appear quite flat and with (C-R)~1.7 and we discuss the apparent youth of NGC
3585 in the context of this work.
