Substructure in Abell clusters

Details Substructure in Abell clusters Substructure in Abell clusters

Jun 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...246..301r&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 246, no. 2, June 1991, p. 301-312. Research supported by ASTRON.

Astronomy and Astrophysics

Astrophysics

26

Astronomical Models, Cosmology, Galactic Clusters, Galactic Structure, Image Processing, Astronomical Maps, Data Reduction, Hubble Constant, Red Shift

Scientific paper

The substructure of 107 selected Abell clusters was investigated in order to determine what fraction of these clusters have a clumpy galaxy distribution. Six tests were used to search for different kinds of clumpiness: two tests which were based on the percolation or cluster analysis method, one test which uses the minimal spanning three algorithm, one test using the distribution of angular spacings, one test that is sensitive to deviations from symmetry about the cluster center, and one that is based on Lee statistical searches for clusters whose members are grouped in two clumps. In total, it was found that 28 clusters showed significant substructure, with four clusters showing significant substructure in more than one test.

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