Intrinsic Absorbers in Active Galactic Nuclei

Details Intrinsic Absorbers in Active Galactic Nuclei Intrinsic Absorbers in Active Galactic Nuclei

May 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aipc.1135...49d&link_type=abstract

FUTURE DIRECTIONS IN ULTRAVIOLET SPECTROSCOPY: A Conference Inspired by the Accomplishments of the Far Ultraviolet Spectroscopic

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Quasars, Active Or Peculiar Galaxies, Objects, And Systems, Interstellar Medium And Nebulae In External Galaxies, Spectroscopy And Spectrophotometry

Scientific paper

We present Far Ultraviolet Spectroscopic Explorer (FUSE) measurements and photoionization analysis of UV absorption in the 3 observations of the low-z Seyfert 1 object IRAS F22456-5125. These 5 distinct, narrow (FWHM>200 km/s) absorbers span a significant range in velocity (+100 to -700 km/s) and ionization (Lyman series, C III, N III, and O VI). We find that the object shows little evidence for corresponding X-ray absorption, and shows variability in the continuum flux of the object (by a factor of 6) the timescale covered by the FUSE observations.
In the coming HST cycle we will observe this object and 5 other low-z quasars and Seyfert galaxies with the Cosmic Origins Spectrograph (COS) as part of a systematic effort to determine the chemical abundances of AGN. These objects show strong C III absorption, which leads us to believe that these targets are good candidates to search for C III* 1173 Å. This will provide us with both the density and the distance to the absorbers for several objects, which therefore yield the kinetic luminosity for the outflows.

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