Abstract

A number of phenomena with radio bursts in the decimeter and centimeter wavelength ranges similar to type-II bursts in the meter range have been considered. In all phenomena, the radio bursts are characterized by the cessation of frequency drift and its reversal. Analysis of all of the available data on relevant bursts provides evidence of termination shocks with particle accelerations in their fronts. This is confirmed by the generation of new sources of hard X-ray radiation and the radio emission of fast bursts (spikes), fibers, and zebra structures. The sources of drift stripes with a drift turn are located either between the burst loop and the lower shock wave or between the lower and upper shock waves. Estimates of the critical Mach number for common parameters of the burst plasma indicated that the values (M_cr = 1.1–1.3) can easily be observed in the given phenomena and that the radiation can be associated with the Buneman instability. The conditions necessary for the generation of observed electromagnetic radiation bursts can be provided in helmet-shaped magnetic structures in the solar corona.

中文翻译：

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太阳无线电爆发与常驻冲击波有关

摘要

已经考虑了许多在分米和厘米波长范围内具有无线电脉冲的现象，类似于在米范围内的II型脉冲。在所有现象中，无线电脉冲串都以停止频率漂移及其反向为特征。对所有有关突发的可用数据的分析提供了在其正面具有粒子加速度的终止冲击的证据。产生新的硬X射线源以及快速爆发（尖峰），纤维和斑马结构的无线电发射可以证实这一点。带有漂移圈的漂移条带的源位于突发环和下部冲击波之间，或者位于下部冲击波和上部冲击波之间。用于突发等离子体的共同参数临界马赫数的概算表明，值（M _CR= 1.1–1.3）可以很容易地在给定现象中观察到，并且辐射可能与Buneman不稳定性有关。可以在太阳日冕中的头盔状磁性结构中提供产生观察到的电磁辐射猝发所需的条件。