Cluster Member Galaxies’ Morphology Type Vs. Color-color Gradient

Color distribution and type segregation of galaxy cluster is a statisticphenomenon of cluster formation and evolution. Based on this phenomenon,combine with morphology type character, We can study environment contribution togalaxy evolution. Recent researches show that the ratio of early-late type of clustermember galaxies are not similar to field galaxies. Take morphol-ogy type as anindictor of color function, which could study cluster dynamic evolution model, andanalysis their dynamic history. In this paper, we choose Beijersbergen& van derHulst’s observation data, consider filters, galaxies classified, and possible inaccuratedata, then get the suitable data. We study their luminosity center, color center,galaxies spatial, color segregation of early=late galaxies, and color gradient of wholecluster, found that its color center is not coincide with luminosity center, and also notnumber density center. In conclusion: galaxies color center is red and then decrease,but color gradient is positive in outer region, especially late types. Their color seemsto be gradational in small scale, but not in large scale. This results show that theComa cluster is not well virialised, and spatial, color distribution of each morphologytype is not the same.