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Study of the Particle Acceleration and Heating in a Weak Solar Flare using JVLA

机译:利用JVLA研究弱太阳耀斑中的粒子加速和加热

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Solar flares are sudden and massive releases of magnetic energy in the corona. As a consequence, particles are efficiently accelerated to high energies and plasma is heated up to tens of millions K [1]. However, this phenomenon is dynamically and morphologically complex. A characteristic of this complexity is the creation of multiple acceleration sites due to the magnetic field reconfiguration. During the flare, the energetic electrons propagating in the loops emits in high-frequency radio wavelengths via gyrosyntrochton emission mechanism [2]. Some class of energetic particles may undergo plasma instabilities producing intense coherent radio emission [3]. Accelerated electrons and hot plasma also produce X-ray bremsstrahlung. The heated plasma filling the magnetic loops show up as bright emissions in various extreme ultra-violet (EUV) wavelengths. This entire flare process shows complex evolution at fine spatial, spectral and temporal scales. Therefore, a more comprehensive understanding of solar flares requires multi-wavelength analysis with observations that provide high spatial resolution coupled with high frequency and time resolution.
机译:太阳耀斑是日冕中突然大量释放的磁能。结果,粒子被有效地加速为高能,等离子体被加热到几千万K [1]。但是,这种现象是动态的和形态复杂的。这种复杂性的一个特征是由于磁场的重新配置而产生了多个加速点。在耀斑期间,在回路中传播的高能电子通过陀螺同步转子的发射机制以高频无线电波长发射[2]。某些类型的高能粒子可能会发生等离子体不稳定性,从而产生强烈的相干无线电发射[3]。加速的电子和热等离子体也会产生X射线致辐射。充满电磁回路的加热等离子体显示为各种极端紫外线(EUV)波长的明亮发射。整个爆发过程显示出在精细的空间,光谱和时间尺度上的复杂演化。因此,要对太阳耀斑有更全面的了解,就需要对多波长分析进行观测,以提供高空间分辨率以及高频率和高时间分辨率。

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