Physics
Scientific paper
Jun 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011jcap...06..022p&link_type=abstract
Journal of Cosmology and Astroparticle Physics, Issue 06, pp. 022 (2011).
Physics
1
Scientific paper
The Pierre Auger Collaboration has reported evidence for anisotropy in the distribution of arrival directions of the cosmic rays with energies E > Eth = 5.5 × 1019 eV. These show a correlation with the distribution of nearby extragalactic objects, including an apparent excess around the direction of Centaurus A. If the particles responsible for these excesses at E > Eth are heavy nuclei with charge Z, the proton component of the sources should lead to excesses in the same regions at energies E/Z. We here report the lack of anisotropies in these directions at energies above Eth/Z (for illustrative values of Z = 6,13,26). If the anisotropies above Eth are due to nuclei with charge Z, and under reasonable assumptions about the acceleration process, these observations imply stringent constraints on the allowed proton fraction at the lower energies.
Abreu P.
Aglietta Marco
Ahn Eun-Joo
Albarracin Gomez F.
Albuquerque F. M. I.
No associations
LandOfFree
Anisotropy and chemical composition of ultra-high energy cosmic rays using arrival directions measured by the Pierre Auger Observatory does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Anisotropy and chemical composition of ultra-high energy cosmic rays using arrival directions measured by the Pierre Auger Observatory, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Anisotropy and chemical composition of ultra-high energy cosmic rays using arrival directions measured by the Pierre Auger Observatory will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-920322