Compact Groups of Galaxies with Complete Spectroscopic Redshifts in the
  Local Universe
  Dynamical analysis of compact groups provides important tests of models of
compact group formation and evolution. By compiling 2066 redshifts from
FLWO/FAST, from the literature, and from SDSS DR12 in the fields of compact
groups in \citet{McC09}, we construct the largest sample of compact groups with
complete spectroscopic redshifts in the redshift range $0.01 < z < 0.22$. This
large redshift sample shows that the interloper fraction in the \citet{McC09}
compact group candidates is $\sim 42\%$. A secure sample of 332 compact groups
includes 192 groups with four or more member galaxies and 140 groups with three
members. The fraction of early-type galaxies in these compact groups is 62\%,
slightly higher than for the original Hickson compact groups. The velocity
dispersions of early- and late-type galaxies in compact groups change little
with groupcentric radius; the radii sampled are less than $100 ~h^{-1}$ kpc,
smaller than the radii typically sampled by members of massive clusters of
galaxies. The physical properties of our sample compact groups include size,
number density, velocity dispersion, and local environment; these properties
slightly differ from those derived for the original Hickson compact groups and
for the DPOSS II compact groups. Differences result from subtle differences in
the way the group candidates were originally selected. The space density of the
compact groups changes little with redshift over the range covered by this
sample. The approximate constancy of the space density for this sample is a
potential constraint on the evolution of compact groups on a few Gigayear
timescale.
