Morphological segregation in the Pisces-Perseus supercluster

Evidence for continuous morphological segregation among galaxies along the entire Hubble sequence is sought for the wide range of galactic densities represented by the Pisces-Perseus supercluster. Observational data makes it possible to outline the gross structure of the supercluster. To the first order, enhancements in the projected surface density distribution of galaxies reflect volume density enhancements in the supercluster. The two-point autocorrelation function is computed for various subsets of the galaxy sample, and it is shown that early-type galaxies in the Pisces-Perseus region tend to cluster on smaller angular scales than later types. In addition, the population fractions of elliptical and S0 galaxies are found to grow with increasing density throughout the supercluster, while the spiral fraction correspondingly decreases. 35 references