Fig. 1
The top panel shows both the latitude compression ratio s(θ) (solid line) and normalized ACR injection efficiency (I(θ), dashed line) as a function of polar angle. Both of these quantities have a maximum in the equatorial regions and decrease towards the polar regions. The bottom panel shows the 1D Fermi I acceleration power law spectral index, as calculated using Eq. (8), for the values of s(θ) shown in the top panel.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.