Abundances in AGN Outflows: Putting Real Numbers Into Quasar Feedback Scenarios

Details Abundances in AGN Outflows: Putting Real Numbers Into Quasar Feedback Scenarios Abundances in AGN Outflows: Putting Real Numbers Into Quasar Feedback Scenarios

Jul 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004hst..prop10225a&link_type=abstract

HST Proposal ID #10225

Physics

Hst Proposal Id #10225 Agn/Quasars

Scientific paper

AGN outflows impact the evolution of supermassive black holes, host galaxies, and the surrounding IGM. To assess the importance of these processes, it is essential to obtain the physical properties of real AGN winds. Our proposed HST/STIS observations of the Seyfert 1 galaxy Mrk 509, in combination with dedicated FUSE time, are designed to obtain the first reliable determination of chemical abundances for an AGN outflow. Previous attempts to measure abundances from outflow absorption troughs did not account for velocity dependent covering factors of the absorbers. This led to large uncertainties in measuring absorption column densities, uncertainties which are magnified when translated to abundances. To extract reliable column densities, we created an array of analysis tools for modeling high-S/N echelle data of doublets and higher multiplet lines from the same ion. After carefully reviewing all the available targets we conclude that the combination of high UV flux and unblended outflow troughs makes Mrk 509 the most promising target for obtaining abundances in AGN outflows. Our proposed Mrk 509 observations will provide the best input to date for accurately modeling the influence of AGN winds on the galactic and inter-galactic environments.

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