The Nature of the Activity in Hickson Compact Groups of Galaxies

Details The Nature of the Activity in Hickson Compact Groups of Galaxies The Nature of the Activity in Hickson Compact Groups of Galaxies

1997-09-10

arxiv.org/abs/astro-ph/9709098v1

Astronomy and Astrophysics

Astrophysics

22 pages, LaTeX (aasms4.sty) + 7 figures; accepted for publication in the Astrophysical Journal

Scientific paper

10.1086/305160

We present the results of the spectral classification of the 82 brightest galaxies in a sample of 17 compact groups. We verify that the AGNs are preferentially located in the most early-type and luminous galaxies of the groups, as is usually observed in the field. But these AGNs also appear to be systematically concentrated towards the central parts of the groups. Our observations suggest a correlation between activity types, morphologies and densities of galaxies in the compact groups. This is consistent with a scenario in which galaxies of compact groups evolve by interacting with their environment and are currently in a quiet phase of their activity

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