by Elizabeth Lovegrove | Sep 5, 2011 | Daily Paper Summaries
The Fermi Large Area Telescope used a clever method of splitting electrons and positrons via the Earth’s magnetic field to show that there’s a significant excess of cosmic ray positrons at high energies – much more than can be explained using known cosmic ray processes.
by Susanna Kohler | Mar 11, 2011 | Daily Paper Summaries
Ultra-high energy cosmic rays may be produced via shock acceleration. This paper presents theoretical upper limits on the energies of the cosmic rays that can be produced in this way, providing a means of testing this theory.
