Speaker
Description
Recent improvements of direct cosmic ray measurements by AMS-02, DAMPE and CALET to-
geather with precise measurements of cosmic ray proton and He, total and logA spectra at knee by
LHAASO open the possibility to study multi-component contributions to cosmic ray flux.
In this work we fit local cosmic ray flux measurements, assuming identical rigidity-dependent flux
of each component with Peters cycle approach. We identify contributions of 4 populations local
cosmic ray flux below knee. We show that first three populations describe all primary fluxes of
AMS-02 nuclei, while 2nd, 3rd and 4th populations contribute to measurements at higher energies
up to Auger for Fe group.
Since every population has it’s own evolution of sources in Galaxy, we study possible variation
of their contribution to measured diffused gamma-ray and neutrino fluxes. We add contribution
of electrons following local measurements and show that total gamma-ray flux can be fitted by
combination of contribution of electrons and cosmic rays at lower energies E < 1 TeV, while above
this energy main contribution to diffuse gamma-ray flux is hadronic. This is consistent with IceCube
measurements of diffuse flux in Galaxy.
