High Velocity Outflows in AGNs Observed with Gratings

Details High Velocity Outflows in AGNs Observed with Gratings High Velocity Outflows in AGNs Observed with Gratings

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010ssrv..157..249k&link_type=abstract

Space Science Reviews, Volume 157, Issue 1-4, pp. 249-264

Physics

X-Ray, Galaxies, Absorption Lines

Scientific paper

Several Active Galactic Nuclei (AGNs) have been reported to harbor fast outflows exceeding 10,000 km s-1, which are detected mostly in their low-resolution CCD X-ray spectra. Only few, however, were detected with high-resolution grating spectrometers. Most of the grating detected outflows have been observed multiple times. In these cases, the absorption spectrum changes are indicating that variability is common among these high-velocity winds. In this paper we revisit the grating observations of PG 1211+143, and PDS 456, and report preliminary results on 4C 74.26. We discuss the spectral variability of the first two sources and its implications to the outflows.

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