Computer Science
Scientific paper
Sep 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009hrxs.confe..16e&link_type=abstract
"High Resolution X-ray Spectroscopy: Towards IXO, Proceedings of the international workshop held at the Mullard Space Science La
Computer Science
Scientific paper
I will review how Chandra HETG spectroscopy provides us detailed diagnostics of the spatially resolved, multiphase narrow-line regions (NLRs) in Seyfert galaxies. The superb energy and spatial resolution of the HETG allows us to probe the ionization state and mechanism along the length of the NLR 'ionization cone', and in particular distinguish between the competing roles of AGN photoionization and jet-induced collisional ionization. I will present preliminary results from a new 400-ks HETG GTO observation of NGC 1068, and will argue that the detection of narrow RRC features and He-like triplets suggests that photoionization from the AGN dominates the energetics of these kpc-scale regions. I will also show that additional constraints from VLA, HST, and Chandra imaging of NGC 2110 indicate that jets can also play a significant role in shaping NLR environments. I will finally discuss the consequences of these results for models that link AGN outflows with feedback between accretion and black-hole growth.
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