Ringed galaxies: ring

The parameter ring is set to R if the detection of a ring in a galaxy has been reported.

Note, that as well as for bars, the detection of a ring is subject to strong observational effects (bandpass, spatial resolution, ...). Only a small fracteion of the largest galaxies in the database have been searched for a ring and the parameter ring is strongly biased. There are 3168 galaxies with ring=R (in the May 2003 version). The parameter bar reports another morphological particularity of the galaxies: The presence of a bar.