Vol 7, No 5

Local Environmental Dependence of Galaxy Properties in a Volume-Limited Sample of Main Galaxies

Xin-Fa Deng, Ji-Zhou He, Qun Zhang, Xiao-Xia Qian, Peng Jiang, Yong Xin


Abstract Using a volume-limited sample of Main Galaxies from SDSS Data Release 5, we investigate the dependence of galaxy properties on local environment. For each galaxy, a local three-dimensional density is calculated. We find that the galaxy morphological type depends strongly on the local environment: galaxies in dense environments have predominantly early type morphologies. Galaxy colors have only a weak dependence on the environment. This puts an important constraint on the process of galaxy formation.



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