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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:1
UID:UW-Physics-Event-8627
DTSTART:20240229T203000Z
DTEND:20240229T213000Z
DTSTAMP:20260413T223453Z
LAST-MODIFIED:20240223T005124Z
LOCATION:Supernova @WIPAC
SUMMARY:New probes of ultrahigh energy cosmic ray source evolution\, N
 PAC (Nuclear/Particle/Astro/Cosmo) Forum\, Marco Muzio\, Penn State Un
 iversity
DESCRIPTION:Despite first observing cosmic rays with energies above an
  EeV (10^18 eV) in the 1960s\, the source of these particles remains a
 n open question. Modern observatories\, in particular the Pierre Auger
  Observatory and Telescope Array\, have firmly established that the co
 smic ray spectrum continues up to ~10^20.3 eV and have significantly a
 dvanced our understanding of these particles. However\, limited statis
 tics\, uncertainties in particle physics\, and significant deflections
  in the Galactic magnetic field have made progress towards discovering
  their astrophysical source extremely challenging. One key astrophysic
 al input needed to understand ultrahigh energy cosmic ray data is the 
 distribution of their sources\, or the source evolution. In this talk\
 , I will focus on multimessenger observations which have the potential
  to pin down the source evolution for the very first time.
URL:https://www.physics.wisc.edu/events/?id=8627
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