Low stellar velocity dispersion rings around nearby Active Galactic nuclei

Details Low stellar velocity dispersion rings around nearby Active Galactic nuclei Low stellar velocity dispersion rings around nearby Active Galactic nuclei

Nov 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011sacm.confe...6s&link_type=abstract

The Starburst-AGN Connection under the Multiwavelength Limelight, held 14-16 September 2011. Published online at http://www.scio

Physics

Scientific paper

I will report recent studies using Integral Field Spectroscopy showing the presence of low stellar velocity dispersion rings within the inner few hundred parsecs of nearby Active Galactic Nuclei (AGN). Resolved spectral synthesis show that at the location of these rings the stellar population is dominated by intermediate age stars (younger than 10^8 yrs), supporting a scenario in which the origin of the low-sigma rings is a past event which triggered an inflow of gas to the nuclear region and formed stars which still keep the colder kinematics of the gas from which they have formed. Considering the age of the starburst and distance from the nucleus, the triggering of the AGN seems to have occurred after this past episode of star-formation.

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