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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-1867
DTSTART:20100910T210000Z
DURATION:PT1H0M0S
DTSTAMP:20260422T144235Z
LAST-MODIFIED:20100908T204018Z
LOCATION:2241 Chamberlin Hall (coffee at 3:30 pm)
SUMMARY:Recent Results from the Pierre Auger Observatory\, Physics Dep
 artment Colloquium\, Jim Matthews\, Louisiana State University
DESCRIPTION:The Pierre Auger Observatory in western Argentina is the l
 argest cosmic-ray experiment ever conducted.  Its purpose is to study 
 the highest energy particles in the universe\, those arriving at earth
  with energy in excess of 1020 eV. Such energy exceeds that which will
  ever be possible with earthly particle accelerators.  Their origin\, 
 their identity\, and the means by which they are accelerated are unkno
 wn.<br>
\n<br>
\nI will discuss our most recent results: (i) the energ
 y spectrum\, (ii) correlations of the arrival directions with AGN (iii
 ) evidence that iron nuclei may be the dominant kind of particle\, and
  (iv) limits on how many of the particles can be photons or neutrinos.
   Plans for the future expansion of the observatory in the Northern He
 misphere will be described.
URL:https://www.physics.wisc.edu/events/?id=1867
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