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arXiv 1604.020652016-04astro-ph.HEastro-ph.GA

Mapping Seyfert and LINER Excitation Modes in the Inner kpc of NGC 3393

W. Peter Maksym, Giuseppina Fabbiano, Martin Elvis, Margarita Karovska, Alessandro Paggi, John Raymond, Junfeng Wang, Thaisa Storchi-Bergmann

备注：: Accepted by ApJ and published (2016, ApJ, 829, 46). Updated to reflect the accepted version
发表信息：: The Astrophysical Journal, Volume 829, Issue 1, article id. 46, 5 pp. (2016)
DOI：: 10.3847/0004-637X/829/1/46

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We have mapped the extended narrow line region (ENLR) of NGC 3393 on scales of $r\lesssim4^{\prime\prime}$ ($\sim1\,$kpc) from the nucleus using emission line images of H$α\,\lambda6563$, [O III]$\lambda5007$, and [S II]$λ\lambda6717,6731$ taken with HST 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 (BPT) diagram, we investigate the impact of feedback from a Compton-thick AGN on its circumnuclear ISM. We find the expected Seyfert-like emission within the ionization bicone ($\lesssim3^{\prime\prime}$; 770 pc). We also find a new, figure 8 shaped LINER cocoon enveloping the bicone and defining a sharp ($\lesssim100\;$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.

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