  With the aim of studying the influence of environment on the nuclear activity
of galaxies, we have selected a well defined sample of 65 Compact Groups of
galaxies with concordant redshift in the Hickson Catalog. In this proceeding,
we present the results of the classification of nuclear activity for 42
galaxies, based on newly obtained spectral observations. In this subsample, 71%
of the galaxies turned out to have emission lines in their nuclei. 73% of these
emission-line galaxies were found to have characteristics consistent with low
luminosity AGN (LLAGN), which makes compact groups extremely rich in such
objects.

Astrophysics