Evolution of Supermassive Black Holes from Cosmological Simulations

Abstract

The correlations between the mass of supermassive black holes and properties of their host galaxies are investigated through cosmological simulations. Black holes grow from seeds of 100 solar masses inserted into density peaks present in the redshift range 12-15. Seeds grow essentially by accreting matter from a nuclear disk and also by coalescences resulting from merger episodes. At z=0, our simulations reproduce the black hole mass function and the correlations of the black hole mass both with stellar velocity dispersion and host dark halo mass. Moreover, the evolution of the black hole mass density derived from the present simulations agrees with that derived from the bolometric luminosity function of quasars, indicating that the average accretion history of seeds is adequately reproduced . However, our simulations are unable to form black holes with masses above $10^9{M}_{\odot }$ at $z\sim 6$, whose existence is inferred from the bright quasars detected by the Sloan survey in this redshift range.

Talk given at the International Workshop on Astronomy and Relativistic Astrophysics (IWARA 2009), Maresias, Brazil. to be published in the International Journal of Modern Physics D

References in corpus (4)

• An Observational Determination of the Bolometric Quasar Luminosity Function
• Direct cosmological simulations of the growth of black holes and galaxies
• Erratum - The many lives of AGN: cooling flows, black holes and the luminosities and colours of galaxies
• Supermassive Black Holes and Their Environments

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• Revisiting the Formation Rate and the Redshift Distribution of LGRBs
• Improving Black Hole Accretion Treatment in Hydrodynamical Simulations
• Coalescence Rate of Supermassive Black Hole Binaries Derived from Cosmological Simulations: Detection Rates for LISA and ET
• The Evolution of the Baryon Distribution in the Universe from Cosmological Simulations
• Misaligned snowplough effect and the electromagnetic counterpart to black hole binary mergers