Extended Data Figure 4: The spectral energy distribution of synchrotron radiation of secondary electrons produced in pp interactions.
From: Acceleration of petaelectronvolt protons in the Galactic Centre
The spectra of protons are the same as in Extended Data Fig. 3. The magnetic field is assumed to be 100 μG. The flux of diffuse X-ray emission measured by XMM-Newton and integrated over the central molecular zone region is also shown. The horizontal error bar corresponds to the bin size.
