A CME-driven shock analysis of the 14-Dec-2006 SEP event

TL;DR

This paper uses Monte Carlo simulations to analyze the structure and particle acceleration of a CME-driven shock from the 14-Dec-2006 event, matching observations from multiple spacecraft.

Contribution

It introduces a dynamical Monte Carlo simulation with anisotropic scattering to study shock structure, particle injection, and energy spectrum in CME-driven shocks.

Findings

Simulation results fit spacecraft observations well.

Detailed shock structure and particle acceleration mechanisms elucidated.

Energy spectrum consistent with observed high-energy particles.

Abstract

Observations of the interplanetary shock provide us with strong evidence of particle acceleration to multi-MeV energies, even up to GeV energy, in a solar flare or coronal mass ejection (CME). Diffusive shock acceleration is an efficient mechanism for particle acceleration. For investigating the shock structure, the energy injection and energy spectrum of a CME-driven shock, we perform dynamical Monte Carlo simulation of the 14-Dec-2006 CME-driven shock using an anisotropic scattering law. The simulated results of the shock fine structure, particle injection, and energy spectrum are presented. We find that our simulation results give a good fit to the observations from multiple spacecraft.