Structure and stellar population of ringed barred galaxy NGC 2336

Results are presented for surface UBVRI photometry of the giant spiral galaxy NGC 2336. The data were obtained with the 1.8-m telescope of the Bohyunsan Optical Astronomy Observatory in Korea, using a CCD camera. The structure and radial light distribution of the galaxy were studied. The compositions of the stellar populations in various regions of the galaxy were estimated using two-color diagrams, and regions of star formation were identified. The properties of the 34 largest such regions were determined. The ages of these star formation regions were estimated using stellar evolutionary synthesis models. It is shown that active, constant, non-burst star formation has been recently proceeding in the disk of NGC 2336.