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We present a heliopause spectrum for galactic electrons over an energy rangefrom 1 MeV to 50 GeV at 122 AU from the Sun. This spectrum can be consideredthe lowest possible local interstellar spectrum (LIS). This is obtained byusing a comprehensive numerical model for solar modulation in comparison withVoyager 1 observations during 2010 and PAMELA data at Earth. Below about 1 GeV,this LIS exhibits a power law with E^(-(1.5 plus minus 0.1), where E is thekinetic energy of these electrons. Reproducing the PAMELA electron spectrum for2009 requires a LIS with a different power law above about 5 GeV of the formE^(-3.15 plus minus 0.05). The heliopause spectrum thus consists of two powerlaws with a break between about 800 MeV and about 2 GeV.

A Heliopause Spectrum for Electrons