First results of a new 3-D model of the time-dependent modulation of electrons in the heliosphere

Abstract

We employ our recently developed ansatz for the time-dependent 3-D modelling of Jovian and galactic electrons in the inner heliosphere. The main goal of the study is to check whether the form of the diffusion tensofi as determined recently by Ferreira et al. (2001a,b) with an extended parameter study of the steady state is also useful for comparison with observations for which the time-dependence cannot be neglected, like long-term modulation due to solar cycle activity and short-term modulation, e.g., due to corotating interaction regions. We apply the model to compare the simulation results with time series of electron intensities as observed with the SOHO, the IMP 8 and the Ulysses spacecraft and discuss the findings.