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We apply a friends-of-friends algorithm to an enhanced SDSS DR12spectroscopic catalog including redshift from literature to construct a catalogof $1588~N\ge3$ compact groups of galaxies containing 5179 member galaxies andcovering the redshift range $0.01 < z < 0.19$. This catalog contains 18 timesas many systems and reaches 3 times the depth of similar catalog of Barton etal. (1996). We construct catalogs from both magnitude-limited andvolume-limited galaxy samples. Like Barton et al. (1996) we omit the frequentlyapplied isolation criterion in the compact group selection algorithm. Thus thegroups selected by fixed projected spatial and rest frame line-of-sightvelocity separation produce a catalog of groups with a redshift independentmedian size. In contrast with previous catalogs, the enhanced SDSS DR12 catalog(including galaxies with $r < 14.5$) includes many systems with $z\leq 0.05$.The volume-limited samples are unique to this study. The compact groupcandidates in these samples have a median stellar mass independent of redshift.Groups with velocity dispersion $\leq 100$ km s$^{-1}$ show abundant evidencefor ongoing dynamical interactions among the members. The number density of thevolume-limited catalogs agrees with previous catalogs at the lowest redshiftsbut decreases as the redshift increases. The SDSS fiber placement constraintslimit the catalog completeness. In spite of this issue the volume-limitedcatalogs provide a promising basis for detailed spatially resolved probes ofthe impact of galaxy-galaxy interactions within similar dense systems over abroad redshift range.

Catalogs of Compact Groups of Galaxies from the Enhanced SDSS DR12