Clusters and Superclusters in the Sloan Survey

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

2004-08-25

arxiv.org/abs/astro-ph/0408463v1

Astronomy and Astrophysics

Astrophysics

12 pages of LaTex text with 12 ps figures, submitted for Proceedings of the workshop "Nearby Large-Scale Structures and the Zo

Scientific paper

We find clusters and superclusters of galaxies using the Data Release 1 of the Sloan Digital Sky Survey. Density fields with smoothing lengthst of 10 and 0.8 Mpc/h are calculated. We found that galaxies and clusters in a high-density environment have luminosities that are five to ten times higher than in a low-density environment. Numerical simulations show that in underdense regions most particles form a rarefied population of pregalactic matter whereas in overdense regions most particles form a clustered population in rich clusters. Simulations show also that very massive superclusters are great attractors and have small bulk motions.

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