Color–magnitude relations in nearby galaxy clusters

  • Mariwan A. Rasheed
  • Khalid K. Mohammad


The rest-frame (g–r) /\(\hbox {M}_{\mathrm{r}}\) color–magnitude relations of 12 Abell-type clusters are analyzed in the redshift range \((0.02\lesssim \hbox {z} \lesssim 0.10)\) and within a projected radius of 0.75 Mpc using photometric data from SDSS-DR9. We show that the color–magnitude relation parameters (slope, zero-point, and scatter) do not exhibit significant evolution within this low-redshift range. Thus, we can say that during the look-back time of z \(\sim \) 0.1 all red sequence galaxies evolve passively, without any star formation activity.


Galaxies: clusters Galaxies evolution Galaxies: photometry 



Funding for SDSS-III has been provided by the Alfred P. Sloan Foundation, the Participating Institutions, the National Science Foundation, and the U.S. Department of Energy Office of Science. The SDSS-III web site is SDSS-III is managed by the Astrophysical Research Consortium for the Participating Institutions of the SDSS-III Collaboration including the University of Arizona, the Brazilian Participation Group, Brookhaven National Laboratory, Carnegie Mellon University, University of Florida, the French Participation Group, the German Participation Group, Harvard University, the Instituto de Astrofisica de Canarias, the Michigan State/Notre Dame/JINA Participation Group, Johns Hopkins University, Lawrence Berkeley National Laboratory, Max Planck Institute for Astrophysics, Max Planck Institute for Extraterrestrial Physics, New Mexico State University, New York University, Ohio State University, Pennsylvania State University, University of Portsmouth, Princeton University, the Spanish Participation Group, University of Tokyo, University of Utah, Vanderbilt University, University of Virginia, University of Washington, and Yale University. This research has made use of the NASA/IPAC Extragalactic Database (NED) which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. The research has also made use of “Aladin Sky Atlas” developed at CDS, Strasbourg Observatory, France (Bonnarel et al. 2000 and Boch and Fernique 2014). It has also made use of the TOPCAT software (Taylor 2005). This research has made use of the X-Rays Clusters Database (BAX) which is operated by the Laboratoire d’Astrophysique de Tarbes-Taulouse (LATT), under contract with the Centre National d’Etude Spatiales (CNES).


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Copyright information

© Indian Academy of Sciences 2018

Authors and Affiliations

  1. 1.Department of Physics, College of ScienceUniversity of SulaimaniSulaimaniIraq
  2. 2.Development Center for Research and Training (DCRT)University of Human DevelopmentSulaimaniIraq

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