Physics – Optics
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004sf2a.conf..617m&link_type=abstract
SF2A-2004: Semaine de l'Astrophysique Francaise, meeting held in Paris, France, June 14-18, 2004. Edited by F. Combes, D. Barret
Physics
Optics
Scientific paper
The coronal line region of emission (CLR) in AGN is located in the vicinity of the central source, where higly ionized gas is detected. The emission lines of silicon are very brights in the infrared, in particular it is detected [SiVI] 1.96µm, [SiVII] 2.48µm, and [SiIX] 3.93µm in several AGN. Because of their high level of ionization potential, these lines are produced by photoionization or excitation by energetics shocks. The typical size of the CLR is of the order of a few tens of parsecs, and it is located at the interface between the BLR and the NLR (depending on the species). Thanks to the high angular resolution achieved with adaptive optics systems, we could study a sample of a few AGN. These new data, combined with other existing images from the HST and radio VLA maps, allow to build a sketch of the central region of the AGN.
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