Physics
Scientific paper
Nov 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011sacm.confe..40j&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
Outflows from Active Galactic Nuclei(AGNs) are an important diagnostic of the physical conditions in their inner regions. The kinetic luminosity (L_k) as a fraction of the total bolometric luminosity of the AGN, is a key parameter that let us describe the role that outflows may play in various AGN feedback mechanisms such as the enrichment of the intergalactic medium, the formation of the supermassive black holes and their host galaxies and their coevolution. To derive L_k, it is necessary to estimate the distance of theoutflow from the quasar nucleus. We presenta detailed analysis of several high-redshift (2.5<=z<=4.0) quasars presenting resolved absorption doublets (such as CIV, SiIV and NV) in their spectra, based on high-resolution WHT+ISIS observations. Covering factors and column densities of several atomic species in the absorbing gas have been measured by comparison of the residual intensities in the two components of the doublets. From these, the ionisation parameters have been estimated providing constraints on the distance of the gas from the nucleus (for plausible assumed values of electron densities), and therefore the kinetic luminosity of the outflow.
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