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Theory working group Report
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1 St - day report.
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We had two presentations on two related, basic topics by Hillas and Ptuskin. The goal in both was to exhibit the basic simplicity and generality of the results. –Hillas: the power input into galactic C.R. –Ptuskin: The anisotropy determined from observations of grammage and basic galactic parameters. We also added to our shopping list of simple problems. 2 nd – day report
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We had a presentation by Peter Biermann. We would like this and the two previous presentations to appear in the workshop volume as the contribution of the theory working group. 3 rd – day report
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Global fits to cosmic-ray spectrum Theory working group Question 8: How many sources to explain the spectrum?
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Three classes of sources Presenter at this conference A (R c,PV) B Extra-galactic Power + 1 m required AtoyanGalactic GRB ? ? ? Berezinsky 2.5 None if E c = 0.3 PeV 2.7 0 3.5 x 10 46 erg/Mpc 3 /yr, for E c = 1 PeV Bergman - - 2.4 4 ? Biermann - Wolf-Rayet SNR ? ? ? Hillas 3 SNII into slow wind 2.3 3 ? Hörandel 4 UH nuclei - - -
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Comments Simplest solution is to have two components, galactic and extra-galactic –Generally, A and B are different populations of galactic sources KASCADE “preliminary” result has been very influential this week – showing a “Peter’s Cycle” structure of the knee.
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