NB Postponed to Easter Term:The most massive black holes in the early universe


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• Xiaohui Fan (University of Arizona)
• Thursday 11 February 2016, 16:00-17:00
• Sackler Lecture Theatre, IoA (tea at 3:30 pm).

If you have a question about this talk, please contact Simon Hodgkin.

High-redshift quasars, powered by accretion of supermassive black holes,provide unique probe to the formation of black holes in the early universe, the co-evolution of black holes and their host galaxies, and the contribution of black accretion to cosmic reionization. I will review recent results from new high-redshift quasar surveys, focusing on the first discoveries of quasars with 10 billion solar mass black holes at the end of reionization; their existence might require direct collapse of massive black hole seeds at early epochs. I will present new ALMA observations on the host galaxies of luminous z>6 quasars. which have high star formation rates accompanied by modest host masses, implying strong evolution of black hole/galaxy mass relation at high-redshift. I will also discuss recent determinations of high-redshift quasar luminosity function, which show a surprisingly high characteristic luminosity and call for a re-evaluation of the role of AGN in cosmic reionziation through a more complete census of faint high-redshift quasar population.

This talk is part of the Institute of Astronomy Colloquia series.

This talk is included in these lists:

• Cambridge Astronomy Talks
• Combined External Astrophysics Talks DAMTP
• Cosmology lists
• Cosmology, Astrophysics and General Relativity
• Institute of Astronomy Colloquia
• Institute of Astronomy Talk Lists
• Kavli Institute for Cosmology Talk Lists
• Priscilla
• Sackler Lecture Theatre, IoA (tea at 3:30 pm)

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