Common origin of the multimessenger spectral anomaly of Galactic cosmic rays

Cosmic ray (CR) spectra show a two -component structure for both primary and secondary particles. In our study, we think that this feature roots in a nearby source halo. This halo acts as a reservoir for CRs in the source region, leading to the high-energy component. Furthermore, it acts as a barrier, effectively halting the travel of CRs from other sources directly in the disk, this causes CRs to propagate from the outer disk and contribute to the low -energy component. As a result, all the spectra anomalies could be well reproduced. This scenario can be extended to the whole disk, we prospect high-energy diffuse gamma-ray emissions exhibit highly spatial dependence, emanating from local sources. We urge HAWC/LHAASO to detect diffuse gamma ray on the spatial scale of a few square degrees.