Groups of galaxies. III. the CfA survey

Journal Article · Wed Jun 01 04:00:00 EDT 1983 · Astrophys. J., Suppl. Ser.; (United States)

DOI:https://doi.org/10.1086/190859· OSTI ID:6049291

Geller, M J; Huchra, J P

We present a statistically homogeneous group catalog (CfA) based on the CfA redshift survey (Huchra et al.). 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 our 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 our 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 our shallow catalog and the CfA catalog is excellent.

• Research Organization: Harvard-Smithsonian Center for Astrophysics
• OSTI ID: 6049291
• Journal Information: Astrophys. J., Suppl. Ser.; (United States), Journal Name: Astrophys. J., Suppl. Ser.; (United States) Vol. 52:2; ISSN APJSA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALGORITHMS
CATALOGS
CLASSIFICATION
DISTRIBUTION
DOCUMENT TYPES
GALAXIES
GALAXY CLUSTERS
IDENTIFICATION SYSTEMS
MATHEMATICAL LOGIC
MATHEMATICS
RED SHIFT
SPATIAL DISTRIBUTION
STATISTICS