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Y. Krongold, F. Nicastro, M. Elvis, N.S. Brickhouse (SAO), S. Mathur (Ohio State University), D. Liedahl (LLNL)
In this contribution we will present X-ray spectroscopic data of the warm absorbers present in Active Galactic Nuclei. We will show that high resolution X-ray spectra of nearby Seyferts can be modelled by a simple 2 or 3 phase photoionized wind, with the phases often appearing in pressure balance. We argue that this outflow, responsible for the complex X-ray and UV absorption in more than half of the Seyfert 1 galaxies, seems to be an ubiquitous characteristic of AGN, and we will analize the physical conditions needed for this multi-phase wind to exist. Finally, we will discuss the possible geometrical scenarios compatible with the X-ray and UV observations, as well as the connection of this wind with other components present in the nuclear environment of AGN.
This work was supported in part by NASA Grant G02-3122A.
The author(s) of this abstract have provided an email address for comments about the abstract: ykrongold@cfa.harvard.edu
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Bulletin of the American Astronomical Society, 36 #2
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