Groups of galaxies. III - The CfA survey

Details Groups of galaxies. III - The CfA survey Groups of galaxies. III - The CfA survey

Jun 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apjs...52...61g&link_type=abstract

Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 52, June 1983, p. 61-87.

Astronomy and Astrophysics

Astrophysics

395

Astronomical Catalogs, Galactic Clusters, Red Shift, Algorithms, Luminosity

Scientific paper

A statistically homogeneous group catalog (CfA) is based on the CfA redshift survey (Huchra et al.) is presented. Groups in the catalog are all density enhancements in redshift space of a factor greater than 20. Group members are identified according to the procedure described in a previous study (Huchra and Geller) of a shallower whole-sky sample. All groups contain at least three members. Of the 176 groups in the CfA catalog, 102 have been identified in one or more previous studies. Because the utilized algorithm searches for volume rather than surface density enhancements, the groups in a given region generally change only through the addition of fainter members when the magnitude limit of the galaxy catalog increases. In the region of overlap, agreement between the shallow catalog and the CfA catalog is excellent.

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