Abstract

The spatial dynamics of microwave emission (data from the Nobeyama Radioheliograph) of active regions with a complex magnetic field configuration before powerful flares, as well as the fine structure of active sources of ultraviolet (UV) emission based on AIA/SDO data, are studied. It is shown that there is unsteady behavior of microwave sources, along with the ignition of a system of crossed UV loops (X-structures). A class-M X-ray flare occurs after several hours at the site of ignition of the intersecting UV loops. The similar behavior observed in microwave and ultraviolet emission in the five active regions studied by us likely serves as a sign of a preflare situation in the active region on the Sun.

中文翻译：

---

太阳紫外线和微波发射前耀斑情况的迹象

摘要

研究了在强大的耀斑之前具有复杂磁场配置的活动区域微波发射的空间动力学（来自Nobeyama Radioheliograph的数据），以及基于AIA / SDO数据的紫外线（UV）放射源的精细结构。结果表明，伴随着交叉的紫外线回路（X结构）的点燃，微波源存在不稳定的行为。几个小时后，在相交的紫外线回路着火处发生了M级X射线耀斑。我们研究的五个活动区域在微波和紫外线发射中观察到的相似行为很可能是太阳活动区域出现耀斑的迹象。