The UZC-SSRS2 Group Catalog | Zendy

M. Ramella | Zendy; Margaret J. Geller | Zendy; A. Pisani | Zendy; L. N. da Costa | Zendy

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The UZC-SSRS2 Group Catalog

Author(s) -

M. Ramella,

Margaret J. Geller,

A. Pisani,

L. N. da Costa

Publication year - 2002

Publication title -

the astronomical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.61

H-Index - 271

eISSN - 1538-3881

pISSN - 0004-6256

DOI - 10.1086/340357

Subject(s) - redshift , sky , group (periodic table) , homogeneous , redshift survey , galaxy , statistical survey , astrophysics , contrast (vision) , geography , physics , astronomy , mathematics , statistics , combinatorics , quantum mechanics , optics

We apply a friends-of-friends algorithm to the combined UZC and SSRS2redshift surveys to construct a catalog of 1168 groups of galaxies; 411 ofthese groups have 5 or more members within the redshift survey. The groupcatalog covers 4.69 steradians and all groups exceed a number density contrastthreshold of 80. We demonstrate that the groups catalog is homogeneous acrossthe two underlying redshift surveys; the catalog of groups and their membersthus provides a basis for other statistical studies of the large-scaledistribution of groups and their physical properties. The median physicalproperties of the groups are similar to those for groups derived fromindependent surveys including the ESO Key Programme and the Las CampanasRedshift Survey. We include tables of groups and their members.Comment: Accepted for publication on A

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