Thermal and Nonthermal Emissions of a Composite Flare Derived from NoRH and SDO Observations

摘要: Differential emission measure (DEM) derived from the extreme ultraviolet (EUV) lines of Atmospheric Imaging Assembly (AIA) on board Solar Dynamic Observatory is used in analysis a solar flare observed by Nobeyama Radioheliograph (NoRH). The target was composite event consisting an impulsive flare, SOL2015-06-21T01:42 (GOES class M2.0), and gradual SOL2015-06-21T02:36 (M2.6), for which separation thermal plasma heating nonthermal particle acceleration major interest. We have calculated free–free intensity maps with AIA-derived DEM compared them against NoRH to attribute difference component. In this way, we were able locate three distinct sources: source components mixed, devoid particles, lacking microwave emission. Both first second sources produced impulsively rising 17 GHz intensities moved away local magnetic polarization inversion correlation radiation. contrast, stay fixed locations show temporal variations temperature uncorrelated interpret these properties as indicating that are powered reconnection passively receive energy donor. finding between demonstrates EUV combined diagnostics.