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Measuring the mass accretion of supermassive black holes

by Dr. Sandra Raimundo (SISSA)

May 12, 2014 from 02:30 PM to 04:00 PM

Where IRA meeting room (CNR Research Area, 4th floor)

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The mechanism of black hole accretion responsible for powering Active Galactic Nuclei (AGN) can be characterised by several physical parameters. One of the most important parameters (but often unknown) is the accretion efficiency, which determines the black hole mass growth and the amount of energy released. Its accurate determination can give insights into the physics of the accretion mechanism, the black hole spin and AGN evolution.  I will describe the method to determine the accretion efficiency of the AGN population and an alternative approach to determine the accretion properties of individual objects. I will then present the results obtained based on multi-wavelength observations of low and high luminosity AGN and discuss the effect of the accretion efficiency on the supermassive black hole growth history.

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