Based on a new survey of AGN activity in Compact Groups of Galaxies, we report a remarkable deficiency of Broad Line AGNs as compared to Narrow Line AGNs. The cause of such deficiency could be related to the average low luminosity of AGNs in CGs: 1039 erg s−1. This result may imply lower accretion rates in CG AGNs, making Broad Line Regions (BLR) undetectable, or may indicate a genuine absence of BLRs. Both phenomena are consistent with gas stripping through tidal interaction and dry mergers.
@article{arxiv.0803.3506,
title = {Deficiency of Broad Line AGNs in Compact Groups of Galaxies},
author = {M. A. Martinez and A. del Olmo and R. Coziol and P. Focardi},
journal= {arXiv preprint arXiv:0803.3506},
year = {2009}
}