Mathematics – Logic
Scientific paper
Oct 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aspc..427..349d&link_type=abstract
Accretion and Ejection in AGN: a Global View. Proceedings of a conference held June 22-26, 2009 in Como, Italy. Edited by Laura
Mathematics
Logic
Scientific paper
To explore the connection between AGN activity and environment in the nearby Universe, we have carried out a spectroscopic study to determine the frequency and nature of the nuclear activity in two well-defined samples of compact groups (CGs) of galaxies: Hickson Compact Groups and Updated Zwicky Catalogue of Compact Groups. We found that a large fraction of the member-galaxies, 63% of the HCG galaxies and 67% of the UZC-CG galaxies, show emission lines. From them, low luminosity AGN is the most frequent activity type found in Compact Groups. Only 8 BLAGNs have been detected, showing a clear deficiency of broad line AGNs that must be related to the compact group environment, where galaxies suffer slow encounters and morphological transformations that result in an important decrease of the total content of gas.
Coziol Roger
Del Olmo Ascension
Focardi Paola
Martinez Angeles M.
Perea Jaime
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