Magnetic reconnection detonation in supernova remnants
arXiv:1808.01089 · doi:10.3847/1538-4357/aad819
Abstract
As a key process that refreshes the interstellar medium, the dynamics and radiative properties of the supernova remnant (SNR) expansion front not only reflect the physical environment of the old interstellar medium (ISM) surrounding the supernova, but they also provide information about the refreshed ISM. However the expansion dynamics of SNRs cannot be simply explained by the conventional law of spherical shock wave propagation; on the other hand, the high energy radiation requires an additional electron acceleration mechanism in the shock front beyond thermal collision. We consider herein the detonation wave description of the SNR expansion, in which magnetic reconnection follows the shock front and transfers the SNR magnetic field energy to both fluid thermal energy and particle kinetic energy. The structure of the magnetic reconnection detonation (MRD) is identified based on scaling analysis in this paper. By applying the MRD description of the SNR expansion shock to the example of the Crab Nebula, this paper shows that the MRD description can explain both the accelerative expansion of the nebula as well as the origin of the luminous expanding shell.
Accepted for publication in ApJ
References in corpus (6)
- Gamma-ray flares from the Crab Nebula
- Discovery of Powerful Gamma-Ray Flares from the Crab Nebula
- The Kinematics of Kepler's Supernova Remnant as revealed by Chandra
- Very high energy emission as a probe of relativistic magnetic reconnection in pulsar winds
- Forward Shock Proper Motions of Kepler's Supernova Remnant
- Pulsar Wind Bubble Blowout from a Supernova