Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008lnea....3...63m&link_type=abstract
Lecture Notes and Essays in Astrophysics, vol. 3. Proceedings of the 3rd Symposium of the Astrophysics Group of the Spanish Roya
Astronomy and Astrophysics
Astrophysics
Active Galaxies, Galaxies Structure, Galaxies Environment
Scientific paper
One of the main issues concerning Nuclear Activity in galaxies (AGNs) is to understand the triggering mechanisms for the onset of non-thermal emission in their nuclei. Both the origin of the gas accreted onto the black hole and the physical mechanisms for the loose of angular momentum required for this funnelling to be effective, have to be elucidated. In other words, the goal is to understand the needed conditions to switch on the AGN activity. But still many aspects of the investigation are a matter of debate. Among them, the role played by gravitational interactions and the relevance of the host galaxy need to be clarified. In this review, the different relationships between AGN activity, the morphological type of the host galaxy and the environment are discussed, in order to understand whether the AGN activity is more related to interacting effects or otherwise can be due to the secular evolution in the hosting galaxies.
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