Alignment effects of clusters of galaxies

Details Alignment effects of clusters of galaxies Alignment effects of clusters of galaxies

Oct 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990aj....100.1006l&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 100, Oct. 1990, p. 1006-1013. Research supported by CONICET and Consejo de Investiga

Mathematics

Logic

16

Galactic Clusters, Galactic Structure, Alignment, Brightness Distribution, Monte Carlo Method, Red Shift

Scientific paper

The measurement os 204 position angles of the brightest cluster galaxies in a sample of southern clusters is presented. Cluster-cluster alignment effects in this sample are analyzed and this is extended with a previous sample of Abell clusters in the northern hemisphere. Results suggest a weak but statically significant signal of alignment of the brightest galaxy in a cluster with the projected vector toward the nearest-neighbor cluster. The anistropy detected amounts approximately to a 30 percent excess of brightest cluster galaxies pointing to the nearest cluster of galaxies. The mean acute angle between the galaxy position angle and the direction toward the nearest neighbor is 30 + or -2 deg, or less. The scale of the detected anisotropy is D approximately equal to 15 Mpc/h.

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