Speaker
Description
In this presentation, we focus on the particle acceleration efficiency and radiation reaction damping in strongly magnetized fields with realistic field strengths of $10^5$ T to $10^{10}$ T, typical of millisecond pulsars, young pulsars and magnetars. Different particle pushers have been implemented, from an exact analytical solution including radiation reaction in the Landau-Lifshitz approximation to the more simple prescription of the radiation reaction limit (Aristotelian dynamics).
We investigated particle acceleration and the impact of radiation reaction for electrons, protons and iron nuclei plunged around millisecond pulsars, young pulsars and magnetars, comparing it to situations without radiation reaction.
We found that the maximum Lorentz factor depends on the particle species but only weakly on the neutron star type. Electrons reach energies up to $\gamma_e \approx {10^8}-{10^9}$ whereas protons energies up to $\gamma_p \approx 10^5-10^6$ and iron up to $\gamma \approx 10^4-10^5$. While protons and irons are not affected by radiation reaction, electrons are drastically decelerated, reducing their maximum Lorentz factor by 2 orders of magnitude. We also found that the radiation reaction limit trajectories fairly agree with the reduced Landau-Lifshitz approximation in almost all cases.
