Mapping Seyfert and LINER excitation modes in the inner kpc of NGC 3393

• Main Author: Maksym, W. Peter
• Publication Date: 2016
• Other Authors: Fabbiano, Giuseppina, Elvis, Martin, Karovska, Margarita, Paggi, Alessandro, Raymond, John Charles, Wang, Junfeng, Storchi-Bergmann, Thaisa
• Format: Article
• Language: eng
• Source: Repositório Institucional da UFRGS
• Download full: http://hdl.handle.net/10183/163691
• topic: Galaxias seyfert; Galáxia NGC 3393; Mapeamentos astronômicos; Galaxies: active; Galaxies: individual (NGC 3393); Galaxies: Seyfert

We mapped the extended narrowline region (ENLR) of NGC 3393 on scales of r  4 (~1 kpc) from the nucleus using emission line images of Hα λ6563, [O III]l5007, and [S II]ll6717, 6731, taken with the Hubble Space Telescope as part of the CHandra survey of Extended Emission line Regions in nearby Seyfert galaxies (CHEERS). By mapping these lines onto a spatially resolved Baldwin–Phillips–Terlevich diagram, we investigate the impact of feedback from a Compton-thick active galactic nucleus on its circumnuclear ISM. We find that the expected Seyfert-like emission within the ionization bicone (3; 770 pc). We also find a new, figure-8-shaped low ionization emission line region (LINER) cocoon enveloping the bicone and defining a sharp (100 pc) transition between higher and lower-ionization zones. These data illustrate the morphological dependence of ionization states of the ENLR relative to bicone and host gas geometries.