Rapidly Variable Column Densities In A Sample Of AGN With XMM-Newton And Suzaku

Details Rapidly Variable Column Densities In A Sample Of AGN With XMM-Newton And Suzaku Rapidly Variable Column Densities In A Sample Of AGN With XMM-Newton And Suzaku

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21541123b&link_type=abstract

American Astronomical Society, AAS Meeting #215, #411.23; Bulletin of the American Astronomical Society, Vol. 42, p.244

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Scientific paper

We present studies of rapidly variable line-of-sight column densities in several active galactic nuclei (AGN) using data from XMM-Newton and Suzaku. By examining light curves, time-selected spectra and the evolving hardness ratios of these objects, we have identified cases where the hard X-ray source is eclipsed by a compact absorbing region. Based on the change in column density, the velocity of the absorbing region and the implied distance of this region from the central source in each AGN, we have identified the absorbers in these eclipse events as broad line region (BLR) clouds. These eclipses allow us to probe the structure and geometry of the innermost nucleus, and in some cases enable us to extract structural information about the clouds themselves for the first time. X-ray data from NGC 3227, Mrk 766 and NGC 1365 will be discussed, among other sources.

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