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Environments of Redshift Survey Compact Groups of Galaxies

机译:红移调查紧凑星系群的环境

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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. Thirteen of 14 RSCGs are embedded in overdense regions of redshift space. The systems range from a loose group of five 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, three are distinct from their general environments (RSCG 9, RSCG 11, and RSCG 85).
机译:红移调查紧凑群(RSCG)是从CfA2 + SSRS2红移调查中选出的N≥3个星系的紧密结。该选择仅基于物理范围和红移空间中的关联。我们在14个RSCG的1 h-1 Mpc范围内测量了300个微弱星系的新红移,以探索RSCG与环境之间的关系。 14个RSCG中有13个嵌入红移空间的密集区域。系统范围从五个成员的松散小组到Abell集群。其余的组RSCG 64似乎是孤立的。 RSCG与Hickson紧凑型群体一样,与世隔绝,与周围环境有所不同。在13种嵌入式RSCG中,有3种不同于其一般环境(RSCG 9,RSCG 11和RSCG 85)。

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