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DRIFT-KINETIC MODELING OF PARTICLE ACCELERATION AND TRANSPORT IN SOLAR FLARES
| Content Provider | Scilit |
|---|---|
| Author | Minoshima, T. Masuda, Satoshi Miyoshi, Y. |
| Copyright Year | 2010 |
| Description | Journal: The Astrophysical Journal Based on the drift-kinetic theory, we develop a model for particle acceleration and transport in solar flares. The model describes the evolution of the particle distribution function by means of a numerical simulation of the drift-kinetic Vlasov equation, which allows us to directly compare simulation results with observations within an actual parameter range of the solar corona. Using this model, we investigate the time evolution of the electron distribution in a flaring region. The simulation identifies two dominant mechanisms of electron acceleration. One is the betatron acceleration at the top of closed loops, which enhances the electron velocity perpendicular to the magnetic field line. The other is the inertia drift acceleration in open magnetic field lines, which produces antisunward electrons. The resulting velocity space distribution significantly deviates from an isotropic distribution. The former acceleration can be a generation mechanism of electrons that radiate loop-top nonthermal emissions, and the latter of escaping electrons from the Sun that should be observed by in situ measurements in interplanetary space and resulting radio bursts through plasma instabilities. |
| Related Links | http://arxiv.org/pdf/1003.2251 http://iopscience.iop.org/article/10.1088/0004-637X/714/1/332/pdf |
| Ending Page | 342 |
| Page Count | 11 |
| Starting Page | 332 |
| ISSN | 0004637X |
| DOI | 10.1088/0004-637x/714/1/332 |
| Journal | The Astrophysical Journal |
| Issue Number | 1 |
| Volume Number | 714 |
| Language | English |
| Publisher | IOP Publishing |
| Publisher Date | 2010-04-09 |
| Access Restriction | Open |
| Subject Keyword | Journal: The Astrophysical Journal Astronomy and Astrophysics Magnetic Reconnection Electric Field Solar Flare Sun Flares Kinetic Theory Magnetic Field Numerical Simulation Distribution Function Particle Acceleration Vlasov Equation |
| Content Type | Text |
| Resource Type | Article |
| Subject | Astronomy and Astrophysics Space and Planetary Science |
