光学天文与技术应用研究室知识库

The scattering time is an important factor which is connected with the maximum energy particle in the diffusive shock. In present simulations, the maximum momentum is calculated by allowing us to determine the scattering probability by scattering time in the scattering processes. We obtain the shape of the energy spectrum with cutoff at some maximum momentum. Also, we find that the value of the maximum energy particle would not increase as the scattering probability increases. This fact would imply that there would be a critical value of the scattering probability between the thermal mechanism and the non-thermal mechanism in the diffusive shock acceleration. Maybe it can explain the ”break” characteristic of the energy spectrum observed from the spacecrafts.