The Cancer Cluster - an unbound collection of groups

Details The Cancer Cluster - an unbound collection of groups The Cancer Cluster - an unbound collection of groups

May 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...268...47b&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 268, May 1, 1983, p. 47-55. Research supported by the Smithsonian Instituti

Astronomy and Astrophysics

Astronomy

94

Astronomical Maps, Galactic Clusters, Red Shift, Astronomical Catalogs, Mass To Light Ratios, Radio Sources (Astronomy), Spatial Distribution, Spiral Galaxies

Scientific paper

A surface density contour map of the Cancer Cluster derived from galaxy counts in the Zwicky catalog is presented. The contour map shows that the galaxy distribution is clumpy. When this spatial distribution is combined with nearly complete velocity information, the clumps stand out more clearly; there are significant differences in the mean velocities of the clumps which exceed their internal velocity dispersions. The Cancer Cluster is not a proper 'cluster' but is a collection of discrete groups, each with a velocity dispersion of approximately 300 km/s, separating from one another with the cosmological flow. The mass-to-light ratio for galaxies in the main concentration is approximately 320 solar masses/solar luminosities (H0 = 100 km/s Mpc).

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