Substructures in Abell clusters of galaxies

Free access article

Issue		A&A Volume 450, Number 1, April IV 2006


Page(s)		9 - 14
Section		Cosmology (including clusters of galaxies)
DOI		http://dx.doi.org/10.1051/0004-6361:20041635

A&A 450, 9-14 (2006)
DOI: 10.1051/0004-6361:20041635

Substructures in Abell clusters of galaxies

P. Flin and J. Krywult

Pedagogical University, Institute of Physics, ul. Swietokrzyska 15, 25-406 Kielce, Poland
e-mail: sfflin@cyf-kr.edu.pl

(Received 10 July 2005 / Accepted 18 November 2005)

Abstract
Aims. We present the results of substructure detection on a large sample of Abell clusters.
Methods. We apply the wavelet transform to positions of galaxies in 183 Abell clusters. The significance of the substructuring detected was determined using Monte Carlo simulations on sets of 1000 randomly generated distributions of galaxies for each cluster and wavelet scale.
Results. 62 of the investigated clusters are strongly substructured; the frequency of occurrence of substructure is 0.34. The investigated clusters were classified as unimodal, bimodal or complex systems. The clusters were divided into clusters having substructures in the field of the cluster S $_{\rm f}$ or in the core region S $_{\rm c}$ . The Kolmogorov-Smirnov test show no significant differences at the level $\alpha=0.05$ in the distribution of clusters having S $_{\rm c}$ and S $_{\rm f}$ substructures with redshift. Using a $\chi^2$ test we found no correlation between the existence of subclustering and the morphological type of galaxy clusters.

Key words: galaxies: clusters: general

SIMBAD Objects

What is OpenURL?

The OpenURL standard is a protocol for transmission of metadata describing the resource that you wish to access. An OpenURL link contains article metadata and directs it to the OpenURL server of your choice. The OpenURL server can provide access to the resource and also offer complementary services (specific search engine, export of references...). The OpenURL link can be generated by different means.

If your librarian has set up your subscription with an OpenURL resolver, OpenURL links appear automatically on the abstract pages.
You can define your own OpenURL resolver with your EDPS Account. In this case your choice will be given priority over that of your library.
You can use an add-on for your browser (Firefox or I.E.) to display OpenURL links on a page (see http://www.openly.com/openurlref/). You should disable this module if you wish to use the OpenURL server that you or your library have defined.