Abstract
Based on the measured cosmic ray anisotropy, a model was built to calculate the Galactic cosmic ray’s contribution to the large scale Galactic magnetic field. The general agreement in the large scale structure of the Galactic magnetic field between the calculation and the observations is obtained. This result shows that the model is in the right approach in understanding the cosmic ray’s contribution to the Galactic magnetic field, and in the mean while, it indicates that the observed anisotropy of cosmic rays on the earth is not just a local behavior in solar vicinity but represents a microcosm of the global anisotropy of the Galactic cosmic rays. Subject headings: cosmic rays — Diffusion — Galaxy: halo — ISM: magnetic fields
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