Protons (red), helium (green), and electrons (blue) spectra. Circles represent the data points of protons, squares electrons, and triangles helium; measurements from Voyager 1 (Potgieter 2014) are represented by filled points, whereas AMS measurements (Aguilar et al. 2015a,b,c) are represented by open points. The curves represent the fits to the LIS spectrum of the different species used in this work (Potgieter 2014). The blue curve does not go through the Voyager 1 data points because the electron data are those collected in 2010 when Voyager had not entered the HP yet.