Observatory reveals key evidence of cosmic ray acceleration limit in W51 for first time

The Large High Altitude Air Shower Observatory (LHAASO) officially released the precise measurements of high-energy gamma radiation from the W51 complex, confirming it as a cosmic-ray accelerator boosting particles up to so-called ultra-high energies (UHE, above 1014 electronvolts). The results also provide key evidence about the cosmic-ray acceleration limit in this complex.