UHECR spectrum: the spatial distribution of the sources
Abstract
Description
The Ultra-high energy cosmic ray energy spectrum summarized by the AGASA collaboration indicates clearly that the cosmic ray spectrum extends well beyond the Greisen-Zatsepin-Kuzmin (GZK) cut-off at \sim 5 x 10^19 eV. Furthermore, despite the small number statistics involved, some structure in the spectrum may be emerging. Using numerical simulations, it is demonstrated in the present work that these features are consistent with a spatial distribution of sources that follows the distribution of luminous matter in the local Universe. Therefore, from this point of view, there is no need for a second high-energy component of cosmic rays dominating the spectrum beyond the GZK cut-off.
To be published in the proc. of the 26th ICRC (Utah, 1999) - OG 3.2.52 - HTML: 4 pages + 4 figures
To be published in the proc. of the 26th ICRC (Utah, 1999) - OG 3.2.52 - HTML: 4 pages + 4 figures