A Comprehensive Examination of the Optical Morphologies of 719 Isolated
  Galaxies in the AMIGA Sample
  Using images from Sloan Digital Sky Survey Data Release 8, we have
re-examined the morphology of 719 galaxies from the Analysis of the
interstellar Medium in Isolated GAlaxies (AMIGA) project, a sample consisting
of the most isolated galaxies that have yet been identified. The goal is to
further improve the classifications of these galaxies by examining them in the
context of the Comprehensive de Vaucouleurs revised Hubble-Sandage (CVRHS)
system, which includes recognition of features that go beyond the original de
Vaucouleurs point of view. Our results confirm previous findings that isolated
galaxies are found across the complete revised Hubble sequence, with
intermediate to late-type (Sb-Sc) spirals being relatively more common.
Elmegreen Arm Classifications are also presented, and show that more than 50%
of the 514 spirals in the sample for which an arm class could be judged are
grand design (AC 8,9,12). The visual bar fraction for the sample is ~50%, but
only 16% are classified as strongly-barred (SB). The dominant family
classification is SA (nonbarred), the dominant inner variety classification is
(s) (pure spiral), and the dominant outer variety classification is no outer
ring, pseudoring, or lens. The Kolmogorov-Smirnov test is used to check for
potential biases in the morphological interpretations, and for any possible
relation between rings, bars, and arm classes with local environment and
far-infrared excess. The connection between morphology and stellar mass is also
examined for a subset of the sample.
