Identification of nearby active galaxies as sources of cosmic rays above 4 × 1019 eV
Abstract:Arrival directions of 63 extensive air showers with energies 4 × 1019 eV < E ≤ 3 × 1020 eV detected by the AGASA, Yakutsk and Haverah Park arrays are analysed in order to identify possible sources of cosmic rays with these energies. We searched for active galactic nuclei within error boxes around the shower-arrival directions and calculated the probabilities that objects are in the error boxes by chance. Our previous result obtained in 1996-2001 is confirmed: the probabilities are small, P > 3 ( is the parameter of the Gaussian distribution) for Seyfert galaxies with red shifts z < 0.01. The Seyfert galaxies are characterized by moderate luminosities (L < 1046 erg s−1) and weak radio and X-ray emission.
Document Type: Research Article
Publication date: 2004-02-01