Cosmic Rays: Recent Progress and some Current Questions
作者： A. M. Hillas
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摘要: Recent progress suggests we are moving towards a quantitative understanding of the whole cosmic ray spectrum, and that many bumps due to different components processes hide beneath relatively smooth total flux between knee ankle. The is much better understood: KASCADE observations support rather sharp rigidity cut-off; while theoretical developments (strong magnetic field generation) indicate supernova remnants (SNR) types should indeed accelerate very similar rigidity. X-ray TeV shell-type SNR produce evidence in favour acceleration at their outer boundaries. There some still-disputed transition extragalactic rays has already occurred just above 10**17 eV, unmarked by an "ankle", which case spectrum can be well described adding single power-law source from sources (but modified energy losses) pre-knee component, if photodisintegrate all nuclei. At highest energy, experiments using fluorscence light calibrate do not yet show any conflict with expected GZK "termination". GRBs seem make significant contribution.
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harvard.edu参考文章(12)
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