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Although studying outflows in the host galaxies of AGN have become theforefront of extra-galactic astronomy in recent years, estimating the energyassociated with these outflows have been a major challenge. Determination ofthe energy associated with an outflow often involves an assumption of uniformdensity in the NLR, which span a wide range in literature leading to largesystematic uncertainties in energy estimation. In this paper, we presentelectron density maps for a sample of outflowing and non-outflowing Seyfertgalaxies at z<0.02 drawn from the S7 survey and understand the origin andvalues of the observed density structures to reduce the systematicuncertainties in outflow energy estimation. We use the ratio of the[SII]6716,6731 emission lines to derive spatially resolved electron densities(<50-2000 cm$^{-3}$). Using optical IFU observations, we are able to measuredensities across the central 2-5 kpc of the selected AGN host galaxies. Wecompare the density maps with the positions of the HII regions derived from thenarrow H$\alpha$ component, ionization maps from [OIII], and spatially resolvedBPT diagrams, to infer the origin of the observed density structures. We alsouse the electron density maps to construct density profiles as a function ofdistance from the central AGN. We find a spatial correlation between the sitesof high star formation and high electron density for targets without an activeionized outflow. The non-outflowing targets also show an exponential drop inthe electron density as a function of distance from the center, with a meanexponential index of ~0.15. The correlation between the star forming sites andelectron density ceases for targets with an outflow. The density within theoutflowing medium is not uniform and shows both low and high density sites,most likely due to the presence of shocks and highly turbulent medium.

Spatially resolved electron density in the Narrow Line Region of z<0.02 radio AGNs