# Cosmic rays & their interstellar medium environment CRISM-2011

26 June 2011 to 1 July 2011
Montpellier, France
Europe/Paris timezone

## On the origin and composition of Galactic cosmic rays

28 Jun 2011, 10:10
20m
Main amphitheater (Polytech)

### Speaker

Dr Nikos Prantzos (IAP Paris)

### Description

I explore the implications of a model in which cosmic rays are accelerated by the forward shocks of supernovae exploding within massive star winds, by using realistic stellar models with mass loss and rotation. Using the same models, I also show that the idea that the bulk of Galactic cosmic rays are accelerated in superbubbles fails to reproduce the key observable of GCR composition, namely the Ne22/Ne20 ratio.

 Slides