Theory working group Report

1St - day report.

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.

2nd – day report

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.

3rd – day report

Global fits to cosmic-ray spectrum

Theory working group

Question 8: How many sources to explain the spectrum?

Three classes of sourcesPresenter at this conference

A (Rc,PV)

B Extra- galactic

Power

+ 1 m requiredAtoyan Galactic GRB ? ? ?Berezinsky 2.5 None if

Ec = 0.3 PeV 2.7 0 3.5 x 1046

erg/Mpc3/yr, for Ec = 1 PeV

Bergman - - 2.4 4 ?Biermann - Wolf-Rayet SNR ? ? ?Hillas 3 SNII into slow

wind 2.3 3 ?

Hörandel 4 UH nuclei - - -

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.