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The nature of the activity in hickson compact groups of galaxies

Sep, 1997
22 pages
Published in:
  • Astrophys.J. 493 (1998) 563
e-Print:
DOI:
Report number:
  • LNA-05-1997
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Abstract: (arXiv)
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