Photometric observations of southern Abell cluster redshifts survey clusters: Structure of galaxies in the inner region of clusters of galaxies

We analyze photometric properties of 1384 cluster galaxies as a function of normalized distance to the cluster center. These galaxies were selected in the central region (r/r(200) <= 0.8) of 14 southern Abell clusters chosen from the Southern Abell Redshift Survey. For 507 of these galaxies we also obtained luminosity profiles. We have studied the morphology-clustercentric distance relation on the basis of the shape parameter n of the Sersic law. We have also analyzed the presence of a possible segregation in magnitude for both the galaxy total luminosity and the luminosity of its components (i.e., the bulge and the disk). Results show a marginal (2 sigma level) decrease of the total luminosity as a function of normalized radius. However, when bulges are analyzed separately, a significant luminosity segregation is found (3 sigma and 2 sigma for galaxies in projection and member galaxies, respectively). The fraction of bulges brighter than M-B <= 22 is 3 times larger in the core of clusters than in the outer region. Our analysis of the disk component suggests that disks are, on average, less luminous in the cluster core than at r/r(200) similar to 0.8. In addition, we find that the magnitude-size relation as a function of r/r(200) indicates (at the 2 sigma level) that disks are smaller and centrally brighter in the cores of clusters. However, the Kormendy relation (the bulge magnitude-size relation) appears to be independent of environment.