منابع مشابه
Compact Groups of Galaxies
Compact groups of galaxies have posed a number of challenging questions. Intensive observational and theoretical studies are now providing answers to many of these, and at the same time, are revealing unexpected new clues about the nature and role of these systems. Most compact groups contain a high fraction of galaxies having morphological or kinematical peculiarities, nuclear radio and infrar...
متن کاملRosat Observations of Compact Groups of Galaxies
The detection of X-ray emission from Hickson's compact groups of galaxies (HCGs) and its origin are the subject of this work. A search for X-ray emission from compact groups revealed detection from 8 out of the 12 HCG images extracted from the ROSAT public archive. For two of them (HCG16 and HCG44), the Xray emission originates from point-like sources spatially coincident with galaxies in the g...
متن کاملEnvironments of Redshift Survey Compact Groups of Galaxies
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 1h Mpc of 14 RSCGs to explore the relationship between RSCGs and their environments. 13 of 14 RSCGs are embedded in overdense regions of r...
متن کاملEvolution of Compact Groups of Galaxies I . Merging rates
We discuss the merging rates in compact groups of 5 identical elliptical galaxies. All groups have the same mass and binding energy. We consider both cases with individual halos and cases where the halo is common to all galaxies and enveloping the whole group. In the latter situation the merging rate is slower if the halo is more massive. The mass of individual halos has little influence on the...
متن کاملOn the reality of compact groups of galaxies
The problem of the reality of Compact Groups of galaxies (CGs) is discussed. We separated two classes of groups: elongated, chain-like groups (I), and round ones (II). The number of chain-like groups among Hickson Compact Groups (HCGs) is about twice as large as that of the round ones. In Shakhbazian Compact galaxy Groups (ShCGs) the proportion of chain-like groups is smaller than that of the r...
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ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 1999
ISSN: 0074-1809
DOI: 10.1017/s0074180900113130