Aims: The change in the distribution function of electron-positron pair beams determines whether GeV photons can be produced as secondary radiation from TeV photons. We will discuss the instabilities driven by pair beams.
Methods: The system of a thermal proton-electron plasma and the electron-positron beam is collision free. We have, therefore, used the particle-in-cell simulation approach. It was necessary to alter the physical parameters, but the ordering of growth rates has been retained.
Results: We were able to show that plasma instabilities can be recovered in particle-in-cell simulations, but their effect on the pair distribution function is negligible for the beam-background energy density ratios typically found in blazars.
Astronomy and Astrophysics
- Pub Date:
- January 2016
- galaxies: active;
- galaxies: jets;
- quasars: general;
- gamma rays: general;
- Astrophysics - High Energy Astrophysical Phenomena;
- Physics - Plasma Physics