Clusters and Superclusters in the Sloan Digital Sky Survey

Details Clusters and Superclusters in the Sloan Digital Sky Survey Clusters and Superclusters in the Sloan Digital Sky Survey

2002-12-13

arxiv.org/abs/astro-ph/0212312v1

Astron.Astrophys.405:425-444,2003

Astronomy and Astrophysics

Astrophysics

19 pages LaTeX text, 7 PostScript Figures, 7 jpg Figures (Figures 1, 2A,B,C,D, 3A,B,C,D, 4A,B, 5A,B, 12, 14), submitted to Ast

Scientific paper

10.1051/0004-6361:20030419

Two-dimensional high-resolution density field of galaxies of the Early Data Release of the Sloan Digital Sky Survey with a smoothing lengths 0.8 h^{-1} Mpc is applied to extract clusters of galaxies, and a low-resolution field with smoothing lengths 10^{-1} Mpc to extract superclusters of galaxies. We compare properties of density field clusters and superclusters with Abell clusters, and superclusters found on the basis of Abell clusters. We found that clusters in high-density environment have a luminosity a factor of about 5 higher than in low-density environment. There exists a large anisotropy between the SDSS Northern and Southern sample in the properties of clusters and superclusters: most luminous clusters and superclusters in the Northern sample are a factor of 2 more luminous than the respective systems in the Southern sample.

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