Nearby Seyfert galaxies are possible sources of cosmic rays above 4*10^19 eV: Updated Results
Arrival directions of 63 extensive air showers with energies 4*10^19<E<=3*10^20 eV detected by the AGASA, Yakutsk, Haverah Park arrays are analyzed in order to identify possible sources of cosmic rays with these energies. We searched for active galactic nuclei within error boxes around the sho...
| Main Author: | |
|---|---|
| Language: | English |
| Published: |
2003
|
| Subjects: | |
| Online Access: | http://cds.cern.ch/record/609226 |
| Summary: | Arrival directions of 63 extensive air showers with energies 4*10^19<E<=3*10^20 eV detected by the AGASA, Yakutsk, Haverah Park arrays are analyzed 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 of objects being in the error boxes by chance. Our previous result obtained in 1996-2001 (see references in the text) is confirmed: the probabilities are small, P>3 sigma (sigma is the parameter of Gaussian distribution) for Seyfert galaxies with redshifts z<0.01 (along with BL Lacertae objects). The Seyfert galaxies are characterized by moderate luminosities (L<10^46 erg/s) and weak radio and X-ray emission. |
|---|