Speaker
Rendani Nndanganeni
(North-West University (Potchefstroom campus) South Africa)
Description
The challenge regarding the modeling of the solar modulation of Jovian electrons lies in determining a reasonable source function which on its part influences the energy range where these particles dominate in the heliosphere. Another controversial issue is what the spectral index of these electrons should be, from the lowest to the highest energies of relevance to solar modulation. If this can be reasonably determined, it becomes possible to compute what the intensity of galactic electrons is at these rather low energies at the Earth. In this study the spectral shape and the value of the Jovian electron source function is revisited and investigated, using a large set of observations and a 3D numerical modulation model. Comparing the modeling with these observations, a new source function is determined, and when used in the model, indicates that Jovian electrons can dominate electron intensities in the inner heliosphere only up to about 25 MeV above which the contribution from galactic electrons becomes progressively larger. This is based on using a new very local interstellar spectrum for galactic electrons.
| Registration number following "ICRC2015-I/" | 112 |
|---|---|
| Collaboration | -- not specified -- |
Author
Rendani Nndanganeni
(North-West University (Potchefstroom campus) South Africa)
Co-authors
Marthinus Potgieter
(North-West Uiversity)
Prof.
William Webber
(New Mexici State University)
