• Corpus ID: 117768322

A Heliopause Spectrum for Electrons

@article{Potgieter2013AHS,
  title={A Heliopause Spectrum for Electrons},
  author={Marius S. Potgieter and Rendani R. Nndanganeni and Etienne E. Vos and Mirko Boezio},
  journal={arXiv: Solar and Stellar Astrophysics},
  year={2013}
}

• M. Potgieter, R. Nndanganeni, +1 author M. Boezio
• Published 7 August 2013
• Physics
• arXiv: Solar and Stellar Astrophysics

We present a heliopause spectrum for galactic electrons over an energy range from 1 MeV to 50 GeV at 122 AU from the Sun. This spectrum can be considered the lowest possible local interstellar spectrum (LIS). This is obtained by using a comprehensive numerical model for solar modulation in comparison with Voyager 1 observations during 2010 and PAMELA data at Earth. Below ∼1 GeV, this LIS exhibits a power law with E −(1.55±0.05) , where E is the kinetic energy of these electrons. Reproducing the PAMELA electron spectrum for 2009 requires a LIS with a different power law above∼5 GeV of the form E −(3.15±0.05) . The heliopause spectrum thus consists of two power laws with a break between ∼800 MeV and∼2 GeV.