NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-06-26 T00:53:01 PDT
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For refcode 2005MNRAS.357..599B:
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NED Abstract

Copyright by Royal Astronomical Society. 2005MNRAS.357..599B FeXXV and FeXXVI lines from low-velocity, photoionized gas in the X-ray spectra of active galactic nuclei Bianchi, Stefano; Matt, Giorgio; Nicastro, Fabrizio; Porquet, Delphine; Dubau, Jacques Abstract. We have calculated the equivalent widths of the absorption lines produced by FeXXV and FeXXVI in a Compton-thin, low-velocity photoionized material illuminated by the nuclear continuum in active galactic nuclei. The results, plotted against the ionization parameter and the column density of the gas, are a complement to those presented by Bianchi & Matt for the emission lines from the same ionic species. As an extension to the work by Bianchi & Matt, we also present a qualitative discussion on the different contributions to the He-like iron emission line complex in the regimes where recombination or resonant scattering dominates, providing a useful diagnostic tool to measure the column density of the gas. Future high-resolution missions (e.g. Astro-E2) will allow us to fully take advantage of these plasma diagnostics. In the meantime, we compare our results with an up-to-date list of Compton-thick and unobscured (at least at the iron line energy) Seyfert galaxies with emission and/or absorption lines from H- and He-like iron observed with Chandra and XMM-Newton. Keywords: line: formation, galaxies: Seyfert, X-rays: galaxies
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