Abstract
Time dependent anisotropic transport of ultra-high energy cosmic rays (UHECRs) from point-like sources in the Galaxy is calculated in various ways. To fully account for the discreteness of UHECR sources in space and time, the Monte Carlo method is used to randomly place sources in the Galaxy and calculate the anisotropy of UHECR flux, given specific realisations of source distribution. We show that reduction in the rate of cross-field transport reduces the anisotropy. However, if the cross-field transport is very small, drift of UHECRs in the Galactic magnetic field (GMF) becomes the dominant contributor to the anisotropy. The surprisingly low anisotropy measured by Auger can be interpreted as intermittency of UHECR sources, without invoking a flat source distribution and/or a high source rate.
| Original language | English |
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| Pages | 35-38 |
| Number of pages | 4 |
| State | Published - 1 Jan 2013 |
| Event | 48th Rencontres de Moriond on Very High Energy Phenomena in the Universe, VHEPU 2013 - La Thuile, Italy Duration: 9 Mar 2013 → 16 Mar 2013 |
Conference
| Conference | 48th Rencontres de Moriond on Very High Energy Phenomena in the Universe, VHEPU 2013 |
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| Country/Territory | Italy |
| City | La Thuile |
| Period | 9/03/13 → 16/03/13 |
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics