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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-3082
DTSTART:20131112T203000Z
DURATION:PT1H0M0S
DTSTAMP:20260419T212031Z
LAST-MODIFIED:20131105T225056Z
LOCATION:4274 Chamberlin Hall
SUMMARY:A multi-messenger quest for the sources of the highest energy 
 cosmic rays\, NPAC (Nuclear/Particle/Astro/Cosmo) Forum\, Foteini Oiko
 nomou\, UCL
DESCRIPTION:The origin of ultra high energy cosmic rays (UHECRs) remai
 ns unknown despite decades of experimental and theoretical research\; 
 their discovery will bring to light the nature of the Universe's most 
 violent accelerators. In this talk I will discuss the observable signa
 tures of UHECRs that can be used to constrain the nature and distribut
 ion of their yet unknown sources\, focusing on the constraints imposed
  by the arrival direction distribution of the highest energy cosmic ra
 ys detected at the Pierre Auger observatory in Argentina. Constraints 
 on the sources of UHECRs may also come from the secondary particles (g
 amma-rays and neutrinos) that UHECRs produce during their propagation.
  I will present the results of a search for the signatures of UHECR ac
 celeration in the gamma-ray spectra of blazars and discuss the implica
 tions for the detectability of such signatures with current and upcomi
 ng gamma-ray instruments.
URL:https://www.physics.wisc.edu/events/?id=3082
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