The nature of the nuclear and extended emission in NGC 5643

Details The nature of the nuclear and extended emission in NGC 5643 The nature of the nuclear and extended emission in NGC 5643

Oct 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008xmm..prop...36m&link_type=abstract

XMM-Newton Proposal ID #06014201

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Active Galactic Nuclei, Quasars, Bl-Lac Objects, X-Ray Background, Ngc 5643

Scientific paper

We propose a 50 ks XMM-Newton observation of the Seyfert 2 galaxy, NGC 5643, with the aim of answering two questions left unanswered by the previous, much shorter (less than 10 ks) XMM-Newton observation. In particular, we want to: a) Measure the O vii triplet with sufficient signal-to-noise to unambiguously distinguish between photoionized and collisionally ionized matter. Contrary to most other Seyferts, in this source collisional plasma seems to dominate, but the previous measures are inconclusive. b) Distinguish between the two alternative models for the hard X-ray emission, i.e. nuclear emission plus scattering component or partially absorbed Compton reflect ion. This will help us to better understand the nature and morphology of the obscuring matter.

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