Study on the Possible Contribution of Galactic Cosmic Rays to the Galactic Halo Magnetic Field

摘要

Based on the measured cosmic ray anisotropy, a model was built to calculate the contribution of the Galacticcosmic ray (GCR) to the large-scale Galactic magnetic field. A general agreement in the large-scale structure of thegalactic magnetic field between the calculation and the observation was obtained. This result shows that the Galactic halomagnetic field may partially contributed by the Galactic electric current related to the directional movement of cosmicrays and the model is the correct approach in understanding the possible contribution of cosmic rays to the galacticmagnetic field. The model also indicates that the observed anisotropy of cosmic rays on the earth is not a local behaviorin the solar vicinity but represents a microcosm of the global anisotropy of GCRs.