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SUMMARY:Searching for signatures of nearby sources of cosmic rays in their
  local chemical composition
DTSTART;VALUE=DATE-TIME:20110714T061500Z
DTEND;VALUE=DATE-TIME:20110714T063000Z
DTSTAMP;VALUE=DATE-TIME:20260813T221448Z
UID:indico-contribution-5066@events.saip.org.za
DESCRIPTION:Speakers: Driaan Bisschoff (North-West University)\nThe direct
  evidence for the acceleration of hadronic cosmic rays at supernova remnan
 ts underlined the need for a 3D time dependent treatment of the propagatio
 n of Galactic Cosmic Rays (CRs). Full 3D time dependent calculations of th
 e propagation of CRs have shown that if CRs indeed originate from supernov
 a remnants\, transient point-like sources\, the flux of the CR primary com
 ponent measured at Earth depends strongly on the local source history\, wh
 ereas the secondary component shows only little or no variations due to ne
 arby sources. The most widely used steady state\, rotational symmetric mod
 els (2D) of CR propagation cannot take into account the local source histo
 ry\, but rather mimic source histories that result in the same local CR fl
 ux as the smeared-out sources assumed in 2D models and do not necessarily 
 coincide with the real local source history. Using a steady state\, rotati
 onal symmetric model for a parameter study\, one may expect different best
  fit values looking at the primary and secondary CR components separately\
 , as it is unlikely that the source history mimicked by the 2D models coin
 cide with the real local source history. \nWe adapted the 2D version of th
 e GALPROP code to a cluster environment and perform parameter studies comp
 aring CR spectra with mainly primary and secondary CR data separately. Fir
 st results of these studies will be presented and recommendations for furt
 her such studies will be given.\n\nhttps://events.saip.org.za/event/7/cont
 ributions/5066/
LOCATION: Acro2
URL:https://events.saip.org.za/event/7/contributions/5066/
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