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SUMMARY:Reionizing the Universe: A Brief History of Baryons and the Cosmic
  Web - Piero Madau (UCSC)
DTSTART:20230919T103000Z
DTEND:20230919T113000Z
UID:TALK203767@talks.cam.ac.uk
CONTACT:Sandro Tacchella
DESCRIPTION:The "forest" of hydrogen and helium Lyman-alpha absorption lin
 es observed in the \nspectra of distant quasars encodes information on the
  physics of structure formation\, \nthe nature of the dark matter\, and th
 e temperature and ionization state of baryons in the\nUniverse. In this ta
 lk I will describe the multiple steps needed to connect flux \nfluctuation
 s in quasar spectra to physical parameters\, present an unprecedented suit
 e \nof thousands of high-resolution hydrodynamical simulations of structur
 e formation with \ndifferent gas thermal histories along with different fr
 ee-streaming lengths of (warm) \ndark matter particles\, and use it to per
 form a statistical comparison of mock spectra with the\nobserved 1D flux p
 ower spectrum and other data. 
LOCATION:Ryle seminar room + online
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