Astronomy and Astrophysics – Astrophysics – High Energy Astrophysical Phenomena
Scientific paper
2010-04-15
Phys. Rev. Lett. 105, 091101 (2010)
Astronomy and Astrophysics
Astrophysics
High Energy Astrophysical Phenomena
4 pages, 2 figures; accepted for publication in Phys. Rev. Lett
Scientific paper
10.1103/PhysRevLett.105.091101
Recent results from Pierre Auger Observatory, showing energy dependent chemical composition of ultrahigh-energy cosmic rays (UHECRs) with a growing fraction of heavy elements at high energies, suggest a possible non-negligible contribution of the Galactic sources. We show that, in the case of UHECRs produced by gamma-ray bursts (GRBs) or rare types of supernova explosions that took place in Milky Way in the past, the change in UHECR composition can result from the difference in diffusion times for different species. The anisotropy in the direction of the Galactic Center is expected to be a few per cent on average, but the locations of the most recent/closest bursts can be associated with observed clusters of UHECRs.
Calvez Antoine
Kusenko Alexander
Nagataki Shigehiro
No associations
LandOfFree
Role of Galactic sources and magnetic fields in forming the observed energy-dependent composition of ultrahigh-energy cosmic rays 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 Role of Galactic sources and magnetic fields in forming the observed energy-dependent composition of ultrahigh-energy cosmic rays, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Role of Galactic sources and magnetic fields in forming the observed energy-dependent composition of ultrahigh-energy cosmic rays will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-379389