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- 17.10. Roger Blandford (U Stanford): On the Acceleration of Atomic Nuclei to a Hundred Joules
Abstract: Cosmic rays are observed to have energies measured to be as high as 200 EeV. A major puzzle is to explain how they are accelerated. In this lecture, I will summarize what we have learned about the composition, spectrum and isotropy from non-relativistic to these “Ultra High" energies. I will then briefly outline the most promising of the mechanisms that have been proposed. Finally I will sketch a scheme in which the entire spectrum is produced, hierarchically, by a “bootstrap” process operating at astrophysical shock fronts of successively larger scale.
slides
- 14.11. Raphaël Mignon-Risse (IFY, NTNU): Oes
Abstract: Cle.
slides
- tbd. Jens Andersen (IFY, NTNU): Pion condensation and pion stars
Abstract: In this talk I will discuss pion condensation in the context of two and three-flavor chiral perturbation theory. I will present results for quark and pion condensates as functions of the isospin chemical potential. The results compare favorably to those of lattice QCD. As an application, I will discuss pion condensation in a dense neutrino cloud and the possibility of pion stars. These are compact objects with a mass up to 20 solar masses and radii of up to 140km.
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