Using an apparent-magnitude limited Main galaxy sample of the Sloan Digital Sky Survey Data Release 7(SDSS DR7), we investigate the correlation between morphologies and luminosity for the Main galaxy sample. Our Main galaxy sample is divided into two classes: Main galaxies only with TARGET_GALAXY flag (bestPrimtarget = 64), and ones also with other flags. It is found that for the second class Main galaxies, the early-type proportion monotonously increases with increasing luminosity nearly in the whole luminosity region. But for the first class Main galaxies, the early-type proportion increases with increasing luminosity only within a certain luminosity region (−22.2 < M r < −19.8). In the high luminosity region (M r < −22.2), the early-type proportion of the first class Main galaxies even decreases dramatically with increasing luminosity. We also analyze the correlation between morphologies and luminosity of galaxies around the peak of the redshift distribution ( 0.07 ≤ z ≤ 0.08 ). In such a narrow redshift region, we still observe strong correlation between morphologies and luminosity, which shows that this correlation is fundamental.
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Published in Astrofizika, Vol. 55, No. 1, pp. 55–63 (February 2012).
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Deng, XF., Qian, XX., Luo, CH. et al. Investigation of the correlation between morphology and luminosity for two classes of main galaxies. Astrophysics 55, 45–52 (2012). https://doi.org/10.1007/s10511-012-9213-1
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DOI: https://doi.org/10.1007/s10511-012-9213-1