ON THE ASYMMETRY OF THE DISTRIBUTION OF THE ANOMALOUS COSMIC-RAY COMPONENT IN THE HELIOSPHERE

An analysis based on a fluid type equation for the spatial diffusion o f the anomalous component of cosmic rays in the solar wind is presente d. The source distributions of the high-energy particles are related t o the pick-up ion flux intensities at the position of the heliospheric shock. Due to the strong asymmetric distributions of the different sp ecies of pick-up ions in the heliosphere and a possible aspherical ter mination shock of the solar wind, the source distributions are expecte d to exhibit element specific upwind-downwind asymmetries. An analytic al treatment of the problem, using boundary conditions derived from ob servations by the Pioneer and Voyager satellites, leads to an estimate of the asymmetries of the anomalous component in the heliosphere. The investigation is performed in two stages: the problem is solved for a n axially symmetric heliosphere in the first instance, and a latitudin al variation of the solar wind velocity as well as in the hydrodynamic diffusion coefficient is incorporated to model the effects of a helio spheric magnetic field in the second.