Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005sf2a.conf..427l&link_type=abstract
SF2A-2005: Semaine de l'Astrophysique Francaise, meeting held in Strasbourg, France, June 27 - July 1, 2005, Edited by F. Casoli
Astronomy and Astrophysics
Astrophysics
Scientific paper
This short review discusses at which energy the transition from Galactic to extra-galactic cosmic rays takes place, with emphasis on recent developments. In particular, it is proposed that the all-particle cosmic ray spectrum comprises only two components, one Galactic (e.g. supernovae) and one extra-galactic, and that the transition occurs at the second knee as a result of the presence of extra-galactic magnetic fields of moderate strength.
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