The angular size-redshift relation. I - Sizes and shapes of nearby clusters of galaxies

Details The angular size-redshift relation. I - Sizes and shapes of nearby clusters of galaxies The angular size-redshift relation. I - Sizes and shapes of nearby clusters of galaxies

Oct 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...217...16h&link_type=abstract

Astrophysical Journal, Part 1, vol. 217, Oct. 1, 1977, p. 16-23.

Mathematics

Logic

46

Astronomical Photography, Galactic Clusters, Galactic Structure, Red Shift, Classifications, Cosmology, Galactic Evolution, Size (Dimensions), Tables (Data)

Scientific paper

Sixty-four cosmologically near clusters are examined on the basis of the projected separations between their brightest galaxies. Cluster angular sizes determined from these separations are found to be inversely proportional to the cluster redshifts, with a relatively small dispersion. The size and structure parameters correlate with Rood and Sastry (1971) types. Type classifications are presented for 23 clusters. Mean-surface-density profiles are determined for the various cluster types. It is found that many clusters are deficient in separations of 1 to 2 Mpc.

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