33RD INTERNATIONAL COSMIC RAY CONFERENCE, RIO DE JANEIRO 2013 THE ASTROPARTICLE PHYSICS CONFERENCE The Solar Modulation of Electrons in the Heliosphere

Abstract: The propagation and modulation of electrons in the heliosphere play an important role in improving our understanding and assessment of the modulation process. A full three dimensional numerical model is used to study the modulation of galactic electrons, from Earth into the inner heliosheath over an energy range from 10 MeV to 50 GeV. The modeling is compared with observations of 6-120 MeV electrons from Voyager 1 and observations from the PAMELA mission. Based on the comparison with Voyager 1 observations a new local interstellar electron spectrum (LIS) is calculated. Utilizing this new input spectrum, the modulated spectra at different positions are computed. Studying the radial profile of 12 MeV electrons in the heliosphere enables us to compute the differential intensity of galactic electrons at this energy at Earth. The model can also reproduce the extraordinary increase of electrons in the inner heliosheath. We conclude that the highest differential intensity that galactic electrons can have at Earth at 12 MeV is: 2.5×10−1 electrons m−2s−1sr−1MeV−1