AAS 196th Meeting, June 2000
Session 21. Supermassive Blackhole Research and Advances with STIS
Topical Session Oral, Tuesday, June 6, 2000, 8:30-10:00am, 10:45am-12:30pm, 2:00-3:30pm, 3:45-5:30pm, Lilac Ballroom

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[21.20] X-ray iron line constraints on the inner accretion disk and black hole spin

C.S. Reynolds (JILA, University of Colorado)

The broad iron line, seen in the X-ray spectra of many AGN, is thought to originate from the inner regions of the black hole accretion disk. I will summarize recent developments in using this line to probe the accretion disk structure, as well as the mass and spin of black holes in Seyfert galaxies. In particular, I will present observational evidence suggesting that the inner regions of the accretion disks in low-luminosity AGN (LLAGN) are distinctly different from those in higher-luminosity AGN. This tentative result lends support to models of LLAGN based upon advective accretion disks.

This work was primarily supported through the Hubble Fellowship Program.

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