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Revisiting AGN accretion disks: Black hole spin and growth rate

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If you have a question about this talk, please contact David Titterington .

Broad wavelength X-shooter observations of a unique AGN sample at z=1.55 show extremely good agreement with predicted spectra of thin accretion disks. The observations provide the first reliable black hole spin measurements for a large number of luminous AGN . They also show a clear “spin-up” for the most massive black holes, which indicate either unusual evolution or a previously unnoticed selection effect.

I shall combine these findings with new data on super-Eddington accretion, through slim accretion disks, in local and high redshift AGN . This has important consequences to the growth rate, and evolution, of all size black holes.

This talk is part of the Cavendish Astrophysics Seminars series.

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