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29 March 2024
 
  » arxiv » astro-ph/0404050

 Article overview


The complex X-ray spectrum of NGC 4507
Giorgio Matt ; Stefano Bianchi ; Filippo D’Ammando ; Andrea Martocchia ;
Date 2 Apr 2004
Journal Astron.Astrophys. 421 (2004) 473-477
Subject astro-ph
AbstractXMM-Newton and Chandra/HETG spectra of the Compton-thin (NH 4x10^{23} cm^{-2}) Seyfert 2 galaxy, NGC 4507, are analyzed and discussed. The main results are: a) the soft X-ray emission is rich in emission lines; an (at least) two--zone photoionization region is required to explain the large range of ionization states. b) The 6.4 keV iron line is likely emitted from Compton-thick matter, implying the presence of two circumnuclear cold regions, one Compton-thick (the emitter), one Compton-thin (the cold absorber). c) Evidence of an Fe xxv absorption line is found in the Chandra/HETG spectrum. The column density of the ionized absorber is estimated to be a few x10^{22} cm^{-2}.
Source arXiv, astro-ph/0404050
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