Volume 405, Number 2, July II 2003
|Page(s)||425 - 443|
|Section||Cosmology (including clusters of galaxies)|
|Published online||19 June 2003|
Clusters and superclusters in the Sloan Digital Sky Survey
Tartu Observatory, 61602 Tõravere, Estonia
2 Fermi National Accelerator Laboratory, MS 127, PO Box 500, Batavia, IL 60510, USA
3 Astrophysical Institute Potsdam, An der Sternwarte 16, 14482 Potsdam, Germany
4 Tuorla Observatory, Väisäläntie 20, Piikkiö, Finland
5 National Research Institute for Astronomy & Geophysics, Helwan Observatory, Cairo, Egypt
Corresponding author: J. Einasto, firstname.lastname@example.org
Accepted: 13 March 2003
We apply the 2-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 to extract clusters and groups of galaxies, and a low-resolution field with smoothing lengths 10 h-1 Mpc to extract superclusters of galaxies. We investigate properties of density field clusters and superclusters and compare properties of these 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 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.
Key words: cosmology: large-scale structure of the Universe / clusters of galaxies; cosmology: large-scale structure of the Universe / galaxies: clusters: general
© ESO, 2003
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.