2016/04/30 by W. Peter Maksym, Giuseppina Fabbiano, G. Fabbiano +10 · 2 citations
Physics and Astronomy · #Active galactic nucleus #Astronomy #Astrophysical Phenomena and Observations #Astrophysics #Diagram #Doubly ionized oxygen #Emission spectrum #Galaxies: Formation, Evolution, Phenomena #Galaxy #Geometry #Ion #Ionization #Lambda #Line (geometry) #Optics #Physics #Prime (order theory) #Spectral line #Stellar, planetary, and galactic studies #astro-ph.GA #astro-ph.HE
paper · pdf · doi:10.3847/0004-637x/829/1/46
published as The Astrophysical Journal, Volume 829, Issue 1, article id. 46, 5 pp. (2016) · Accepted by ApJ and published (2016, ApJ, 829, 46). Updated to reflect the accepted version
openalex publication_date 2016/09/20 · arxiv created 2016/10/26 · arxiv updated 2016/10/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
ABSTRACT We mapped the extended narrowline region (ENLR) of NGC 3393 on scales of ( kpc) from the nucleus using emission line images of H α λ 6563, [O iii ] , and [S ii ] , 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 ( 770 pc). We also find a new, figure-8-shaped low ionization emission line region (LINER) cocoon enveloping the bicone and defining a sharp ( 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.