ICM Substructure in Low-Redshift Galaxy Clusters

Details ICM Substructure in Low-Redshift Galaxy Clusters ICM Substructure in Low-Redshift Galaxy Clusters

Dec 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aas...195.6401g&link_type=abstract

American Astronomical Society, 195th AAS Meeting, #64.01; Bulletin of the American Astronomical Society, Vol. 31, p.1466

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Scientific paper

Clusters of galaxies are believed to be the largest virialized structures in the Universe and are believed to have formed by a process of hierarchical merging. Evidence of cluster substructure provides information on the merger history of the clusters and can be used to constrain cosmological models. Substructure in the intra-cluster medium (ICM), may also be a significant source of systematic error in gas mass fraction and distance measurements made from cluster observations. We use a sample of x-ray luminous clusters to characterize substructure in the ICM of 24 nearby (z<0.2) clusters. Using a wavelet decomposition technique on ROSAT PSPC images, we locate and quantify significant structure in the images. We present and discuss the results for the sample.

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