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SUMMARY:NB Postponed to Easter Term:The most massive black holes in the ea
 rly universe
 - Xiaohui Fan (University of Arizona)
DTSTART:20160211T160000Z
DTEND:20160211T170000Z
UID:TALK63476@talks.cam.ac.uk
CONTACT:Simon Hodgkin
DESCRIPTION:High-redshift quasars\, powered by accretion of supermassive b
 lack holes\,provide unique probe to the formation of black holes in the ea
 rly universe\,\nthe co-evolution of black holes and their host galaxies\, 
 and the contribution of black accretion to cosmic reionization. I will rev
 iew recent results from new high-redshift quasar surveys\, focusing on the
  first discoveries of quasars with 10 billion solar mass black holes at th
 e end of reionization\; their existence might require direct collapse of m
 assive black hole seeds at early epochs. I will present new ALMA observati
 ons on the host galaxies of luminous z>6 quasars. which have high star for
 mation rates accompanied by modest host masses\, implying strong evolution
  of black hole/galaxy mass relation at high-redshift. I will also discuss 
 recent\ndeterminations of high-redshift quasar luminosity function\, which
  show a surprisingly high characteristic luminosity and call for a re-eval
 uation of the role of AGN in cosmic reionziation through a more complete c
 ensus of faint high-redshift quasar population.\n
LOCATION:Sackler Lecture Theatre\, IoA (tea at 3:30 pm)
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