Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006pmpa.conf...51g&link_type=abstract
2005: PAST MEETS PRESENT IN ASTRONOMY AND ASTROPHYSICS. Proceedings of the 15th Portuguese National Meeting. Held 28-30 July 200
Astronomy and Astrophysics
Astrophysics
Scientific paper
The "Warm Absorber" (WA) observed in Active Galactic Nuclei (AGN) displays zones of different density, temperature and ionization. Our approach to the study of the WA relies on the assumption of total pressure equilibrium, which results in the natural stratification of the medium and allows to explain the presence of lines from different ionization states in many AGN observed by XMM-Newton and Chandra. We have used the photoionization code TITAN, developed by our team, to calculate a grid of constant total pressure models dedicated to fit the WA in NGC 3783. Our study shows that the WA can be modelled in pressure equilibrium. Finally, this work provides a good example of the application of the TITAN code to the study of the WA in AGN, and opens perspectives for its use by a larger community, through a grid of constant total pressure models to be made available via XSPEC and/or via Virtual Observatory facilities.
Chevallier Loïc
Collin Suzy
Dumont Anne-Marie
Goncalves Alexandre C.
Goosmann Rene W.
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