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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-2192
DTSTART:20111027T213000Z
DURATION:PT1H0M0S
DTSTAMP:20260420T132221Z
LAST-MODIFIED:20111006T154130Z
LOCATION:4274 Chamberlin
SUMMARY:COSMIC RAY ACCELERATION IN SUPERNOVA REMNANTS\, NPAC (Nuclear/
 Particle/Astro/Cosmo) Forum\, Pasquale Blasi\, Osservatorio Astrofisic
 o di Arcetri (Florence\, Italy)
DESCRIPTION:Present observations\, especially in the gamma ray band\, 
 appear to confirm the need for source spectra of cosmic rays steeper t
 han suggested by current theories. This trend is also required by obse
 rvations of the anisotropy on large scales which in the TeV range is a
 t the level of $sim 10^{-3}$ and appear to stay roughly constant with 
 energy up to around the knee region. Steep spectra are very difficult 
 to explain unless one invokes poorly understood effects in particle sc
 attering or probably the presence of neutrals in the medium where the 
 shock propagates. I will discuss these issues with particular emphasis
  on the process of particle acceleration in partially ionized media.
URL:https://www.physics.wisc.edu/events/?id=2192
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