Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007sf2a.conf..332d&link_type=abstract
SF2A-2007: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics held in Grenoble, France, July
Astronomy and Astrophysics
Astrophysics
Scientific paper
We investigate the kinematic properties of the stars and ionised gas in the circumnuclear regions of a matched sample of Seyfert and non-active galaxies, using the SAURON Integral-Field Unit (IFU) on the William Herschel Telescope (WHT). The stellar velocity fields present regular rotation patterns. After removal of the non-gravitational components due to e.g. AGN-driven outflows, the ionised gas kinematics are dominated by rotation. The non-active galaxies present global alignment between stellar and gaseous components while a majority of the Seyfert galaxies present strong kinematic misalignments. A more refined analysis of our two-dimensional kinematic maps reveal evidence for deviations from axial-symmetry in the gaseous velocity fields, these deviations being stronger in the case of Seyfert galaxies than the associated non-active galaxies. This suggests the presence of weak dynamical perturbations in the circumnuclear regions of Seyfert galaxies and provides a tentative link between host galaxy dynamics in these regions and the nuclear activity.
Dumas Gaelle
Emsellem Eric
Mundell Carole G.
Nagar Neil
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