Speaker
Description
Combining the CR measurements by AMS-02 and DAMPE in space and those by LHAASO and Auger on the ground, a Galactic cosmic ray model has been
constructed to recover all these measurements from tens of GeV to tens of EeV. The precise measurements of CR spectra for individual species by AMS-02 and DAMPE together with the newest LHAASO results clearly indicate three Galactic CR components, that is, a soft low-energy background, a hard high-energy component, and a local source contribution. The LHAASO data also show that above ∼10^16 eV, a
nonnegligible extra component, possibly of extragalactic origin, must be included. Combining the Auger results and the LHAASO results, we figure out the extragalactic CRs that need at least two components at lower and higher energies. The spectrum features and mass measurements in all energy ranges are all well reproduced in the model.
