Orateur
Prof.
Tsvi Piran
(Racah Institute for Physics Hebrew University Jerusalem Israel)
Description
I review the astrophysical issues that are at the heart of the Pamela and ATIC observations. Specifically I stress the
importance of diffusion and escape of Cosmic Rays from the Galaxy as well as the issue of cooling of Cosmic Ray leptons while traveling in the Galaxy. I summarize various astrophysical resolutions of these two observations. I then present a novel idea - the concentration of cosmic ray sources, SNRs, in the spiral arms (that was previously ignored) explains naturally both results in a model whose only parameters are direct observable quantities. That is - it is quite likely that both experiments don't require either new physics (WIMPS) or new Astrophysical sources.
Auteur principal
Prof.
Tsvi Piran
(Racah Institute for Physics Hebrew University Jerusalem Israel)
Co-auteurs
Dr
Ehud Nakar
(Tel Aviv University)
Prof.
Nir Shaviv
(Racah Institute for Physics Hebrew University Jerusalem Israel)
