Data di Pubblicazione:
2022
Abstract:
The chemical composition of the highest end of the ultra-high-energy cosmic ray spectrum is very hard to measure experimentally, and to this day it remains mostly unknown. Since the trajectories of ultra-high-energy cosmic rays are deflected in the magnetic field of the Galaxy by an angle that depends on their atomic number Z, it could be possible to indirectly measure Z by quantifying the amount of such magnetic deflections. In this paper we show that, using the angular harmonic cross-correlation between ultra-high-energy cosmic rays and galaxies, we could effectively distinguish different atomic numbers with current data. As an example, we show how, if Z = 1, the cross-correlation can exclude a 39% fraction of Fe56 nuclei at 2σ for rays above 100 EeV.
Tipologia CRIS:
03A-Articolo su Rivista
Keywords:
galactic magnetic fields; galaxy clustering; ultra high energy cosmic rays
Elenco autori:
Tanidis K.; Urban F.R.; Camera S.
Link alla scheda completa:
Link al Full Text:
Pubblicato in: