Dick, Frank A.
The Sloan Digital Sky Survey (SDSS) is a large imaging and spectroscopic survey. We took the imaging and spectral data of a sample of galaxies at redshift from 0 to 1 from the SDSS database and aimed at studying the evolution of their rest-frame luminosity and color with redshift. We found that the galaxy distribution is bimodal in all colors in all redshift bins, from which we can classify galaxies into red and blue types. Further, this bimodal distribution has become redder towards present, which suggests the aging of galaxies. Additionally, we found that galaxy luminosity increases with redshift and the number ratio of red to blue galaxies increases with luminosity.
Worcester Polytechnic Institute
Major Qualifying Project
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