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SUMMARY:Do Supermassive Black Holes need Iron Supplements? - Matthew Templ
 e
DTSTART:20220216T134500Z
DTEND:20220216T141500Z
UID:TALK170207@talks.cam.ac.uk
CONTACT:Hannah Uebler
DESCRIPTION:The metal abundances of high redshift quasar broad-line region
 s are commonly inferred to be significantly higher than the ISM gas-phase 
 metallicities of their host galaxies. We present new photoionization model
 s which demonstrate that the range of high-ionization UV broad line ratios
  observed in luminous quasar spectra can in fact be explained by changes i
 n the density and location of the emitting gas\, without the need for supe
 r-solar metallicities. Within our new paradigm\, quasars with stronger out
 flow signatures show stronger emission from gas which is denser and locate
 d closer-in to the ionizing source.
LOCATION:The Hoyle Lecture Theatre + Zoom 
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