A novel analytical model of the magnetic field configuration in the Galactic Center

Understand

Context: Cosmic-ray propagation is strongly dependent on the large-scale configuration of the Galactic magnetic field.

• In particular, the Galactic center (GC) region provides highly interesting cosmic-ray data from gamma-ray maps and it is clear that a large fraction of the cosmic rays detected at Earth originate in this region of the Galaxy.
• Yet because of confusion from line-of-sight integration, the magnetic field structure in the Galactic center is not well known and no large-scale magnetic field model exists at present.
• Aims: In this paper, we develop a magnetic field model, derived from observational data on the diffuse gas, nonthermal radio filaments, and molecular clouds.