Irregularity in spectrum of the primary cosmic rays mass composition at an energy of ~ 10 PeV

2024/05/22 by S. E. Pyatovsky, Pyatovsky, S. E.
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #High Energy Astrophysical Phenomena (astro-ph.HE) #Neutrino Physics Research

paper · pdf · doi:10.48550/arxiv.2405.13764

openalex publication_date 2024/05/22 · openalex created_date 2024/05/25 · openalex updated_date 2026/07/28

Abstract

Irregularity in spectrum of the primary cosmic rays (PCR) mass composition at an energy of ~ 10 PeV is considered. To assess changes of the PCR mass composition, the X-ray emulsion chamber (XREC) method and the halo-method based on the XEC were used. The study of changes in the PCR mass composition was carried out based on the experimentally obtained characteristics of the extensive air showers (EAS) trunks, where fluctuations of these characteristics are minimal and information about the primary interaction of PCR nuclei with atmospheric atoms is maximally preserved. It is shown that at an energy of ~ 10 PeV there is a local maximum in the heavy nuclei fraction. This maximum is correlated with the PCR sources, - variable stars SR (red giants and super-giants) and WR (Wolf-Rayet).

Related

• Sources of primary cosmic rays forming the bump near E0=100 PeV
• Sources of primary cosmic rays
• The fraction of light nuclei in the mass composition of primary cosmic radiation at E0=1-100 PeV
• Change of primary cosmic radiation nuclear composition in the energy range 10¹⁵ - 10¹⁷ eV
• Average mass composition of primary cosmic rays in the superhigh energy region by Yakutsk complex EAS array data