Report
Understanding Streaming Instabilities in the Limit of High Cosmic Ray Current Density
| العنوان: | Understanding Streaming Instabilities in the Limit of High Cosmic Ray Current Density |
|---|---|
| المؤلفون: | Lichko, Emily, Caprioli, Damiano, Schroer, Benedikt, Gupta, Siddhartha |
| سنة النشر: | 2024 |
| المجموعة: | Astrophysics Physics (Other) |
| مصطلحات موضوعية: | Astrophysics - High Energy Astrophysical Phenomena, Physics - Plasma Physics |
| الوصف: | A critical component of particle acceleration in astrophysical shocks is the non-resonant (Bell) instability, where the streaming of cosmic rays (CRs) leads to the amplification of magnetic fields necessary to scatter particles. In this work we use kinetic particle-in-cells simulations to investigate the high-CR current regime, where the typical assumptions underlying the Bell instability break down. Despite being more strongly driven, significantly less magnetic field amplification is observed compared to low-current cases, an effect due to the anisotropic heating that occurs in this regime. We also find that electron-scale modes, despite being fastest growing, mostly lead to moderate electron heating and do not affect the late evolution or saturation of the instability. |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2411.05704 |
| رقم الانضمام: | edsarx.2411.05704 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |