Propagation of cosmic rays in the AMS-02 era

Understand

In this work we use the newly reported Boron-to-Carbon ratio (B/C) from AMS-02 and the time-dependent proton fluxes from PAMELA and AMS-02 to constrain the source and propagation parameters of cosmic rays in the Milky Way.

• A linear correlation of the solar modulation parameter with solar activities is assumed to account for the time-varying cosmic ray fluxes.
• A comprehensive set of propagation models, with/without reacceleration or convection, have been discussed and compared.
• We find that only the models with reacceleration can self-consistently fit both the proton and B/C data.