CR-MHD simulations of a Milky Way analogue reproduce observed gamma-ray luminosities and spectra without tuning, with sky morphology set by local gas density fluctuations and angular power spectra tracing gas column rather than cosmic-ray density.
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The authors produce a 3D tomographic reconstruction of Galactic cosmic-ray proton density from Fermi-LAT gamma-ray data and a gas model, finding a smooth distribution with moderate inner-Galaxy enhancement consistent with AMS-02 local measurements.
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The diffuse gamma-ray sky of a Milky Way analogue: Local diversity and global constraints
CR-MHD simulations of a Milky Way analogue reproduce observed gamma-ray luminosities and spectra without tuning, with sky morphology set by local gas density fluctuations and angular power spectra tracing gas column rather than cosmic-ray density.
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A Three-Dimensional Tomographic Reconstruction of the Galactic Cosmic-Ray Proton Density
The authors produce a 3D tomographic reconstruction of Galactic cosmic-ray proton density from Fermi-LAT gamma-ray data and a gas model, finding a smooth distribution with moderate inner-Galaxy enhancement consistent with AMS-02 local measurements.