Galactic modulation of extragalactic cosmic rays: Possible origin of the knee in the cosmic ray spectrum

Hiroshi Muraishi, Shohei Yanagita, Tatsuo Yoshida

The existence of the spectral break around $\sim 3\times 10^{15}$ eV in the cosmic ray spectrum (referred to as the `knee') is one of the biggest questions in cosmic ray astrophys…