A. A. Mikhailov — Page 2

arXiv2003

Composition of Cosmic Rays with the Energy more than 4x10^{19} eV

Arrival directions of extensive air showers by using world data are considered. It is found that the shower distribution in zenith angle at the energies E>10^{19} eV and E>4x10^{19} eV differs from each other. By our estimations, the shower with E>10^{20} eV at the Sugar array was not registered. The mass composition of very high-energy cosmic rays has been estimated. It is shown that E>4x10^{19} eV cosmic rays are, most likely, super heavy nuclei with charge Z>26.

astro-ph↗

arXiv1999

Search for Sources of Ultrahigh Energy Cosmic Rays

The connection between the arrival directions of ultrahigh energy cosmic rays by using the EAS array data and point galactic sources of radio-and gamma-radiations, pulsars,is sought. At the mean particle energy of 10^{19} eV the correlation between the particle arrival directions and pulsars located along the magnetic field lines has been found. According to our estimations the chance probability is equal to 2.10^{-4}. The observed particle flux from 16 pulsars inside a circle of radius <6^{\circ} exceeds the background by 6.3σ(p < 10^{-10}), from PSR 2351+61 - 5σ. A group of 9 pulsars has been found from the direction of which the particle flux in the region 10^{\circ}\times60^{\circ} is in excess of the expected one by 4.4σ. The obtained results are discussed.

astro-ph↗