Environments of Redshift Survey Compact Groups of Galaxies

Abstract

Redshift Survey Compact Groups (RSCGs) are tight knots of N >= 3 galaxies selected from the CfA2+SSRS2 redshift survey. The selection is based on physical extent and association in redshift space alone. We measured 300 new redshifts of fainter galaxies within 1 h^{-1} Mpc of 14 RSCGs to explore the relationship between RSCGs and their environments. 13 of 14 RSCGs are embedded in overdense regions of redshift space. The systems range from a loose group of 5 members to an Abell cluster. The remaining group, RSCG 64, appears isolated. RSCGs are isolated and distinct from their surroundings to varying degrees, as are the Hickson Compact Groups. Among the 13 embedded RSCGs, 3 are distinct from their general environments (RSCG 9, RSCG 11 and RSCG 85).

35 pages, including 10 figures and 5 tables, accepted for publication in the Astronomical Journal

References in corpus (4)

• The Properties of Poor Groups of Galaxies: I. Spectroscopic Survey and Results
• The Properties of Poor Groups of Galaxies: II. X-ray and Optical Comparisons
• Compact groups of galaxies
• The Nature of the Activity in Hickson Compact Groups of Galaxies

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• Compact groups in the UZC galaxy sample
• The Dynamics of Poor Systems of Galaxies
• UV+IR Star Formation Rates: Hickson Compact Groups with Swift and Spitzer
• The Relation Between Activity and Environment in Compact Groups of Galaxies
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• AGN population in Hickson's Compact Groups. I. Data and Nuclear Activity Classification
• Where are compact groups in the local Universe?
• Compact groups in theory and practice -- IV. The connection to large-scale structure
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• ROSAT-HRI investigation of the NGC 507 X-ray halo
• Compact Groups of Galaxies in Sloan Digital Sky Survey and LAMOST Spectral Survey. II. Dynamical Properties of Isolated and Embedded Groups
• Hierarchical Formation in Action: Characterizing Accelerated Galaxy Evolution in Compact Groups Using Whole-Sky WISE Data
• The Global Environment of Small Galaxy Systems
• Is the Fast Evolution Scenario for Virialized Compact Groups Really Compelling? The Role of a Dark Massive Group Halo
• Galaxy evolution in compact groups II. Witnessing the influence of major structures in their evolution
• Galaxy groups in the 2dF galaxy redshift survey: A Compactness Analysis of Groups
• Characterising galaxy groups: spectroscopic observations of the Shakhbazyan sample
• On the Characteristic Isolation of Compact Subgroups within Loose Groups of Galaxies