Пространственные и временные особенности поведения микроволнового и ультрафиолетового излучения в эруптивных событиях

Известия Крымской астрофизической обсерватории. 2022. Т. 118. № 1. С. 65–74.

Bakunina I. A., Мельников В. Ф., Шаин А. В., Абрамов-Максимов В. Е., Моргачев А. С.

To date, observational signs that determine the ability of  solar active region to cause an eruption of matter into the high layers of the solar corona (CME) are not entirely clear. This makes it difficult to understand the physical mechanism of the CME trigger. This paper presents a search for observational signs that may indicate the emergence of an eruptive process. For this, we carried out a comparative analysis of the conditions before and during flare for flare events, both accompanied and not accompanied by CME. We studied the features of the spatial and temporal dynamics of microwave and ultraviolet emission (data from the Nobeyama radioheliograph, SDO / AIA), as well as magnetic fields (SDO / HMI) for 16 active regions (AR). Using this sample, it was found that flares accompanied by CMEs most often occur in open magnetic configurations, in regions with twisted magnetic ropes, with floating fluxes. CMEs are also observed most often in flares of longer duration and in those ARs that have sources in microwave radiation that are more extended in area.

Keywords: микроволновое излучение, Sun, Солнце, ультрафиолетовое излучение, солнечные вспышки, solar flares, microwave emission, ultraviolet emission, coronal mass ejection (CME), корональные выбросы масс (CME)