Magnetic lensing and clustering of ultra high energy cosmic rays

Details Magnetic lensing and clustering of ultra high energy cosmic rays Magnetic lensing and clustering of ultra high energy cosmic rays

Sep 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aipc..784..763h&link_type=abstract

MAGNETIC FIELDS IN THE UNIVERSE: From Laboratory and Stars to Primordial Structures. AIP Conference Proceedings, Volume 784, pp

Astronomy and Astrophysics

Astronomy

1

Cosmic Rays, Magnetic Fields, Cosmic Rays

Scientific paper

Ultra high energy cosmic ray (UHECR) astronomy is inevitably tied to the magnetic fields along the line of sight towards the most powerful sources, if the bulk of their emission is in the form of charged particles. The behaviour of the transition from a diffusive regime towards quasirectilinear propagation at the highest energies is a very rich source of information, both on the source properties as well as on the magnetic fields. We summarize strategies to reconstruct the parameters of intervening magnetic fields based on the lensing phenomena that take place around a characteristic energy at which it is likely to observe strongly magnified multiple images of single UHECR sources. We discuss properties of the clustering of arrival directions that may be expected from lensing effects. A correlation analysis of present data in angular separation and energy ratio of pairs of events hints to magnetic lensing as a plausible explanation of the observed clustering. We identify tools that may help to characterize the nature of the cosmic ray sources based on the clustering properties of observed events.

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