RHESSI-20 Workshop: Preparing for the Next Decade in High-Energy Solar Physics Research

Radio imaging of quasi-periodic magnetic reconnection and electron acceleration during a solar flare

8 Jul 2021, 19:30

30m

Virtual

Working Group 2: Particle acceleration Working Group 1: Flare thermal response

Speaker

Yuankun Kou (Nanjing University)

Description

We analyze a C-class solar flare with the microwave (MW) data from Expanded Owens Valley Solar Array (EOVSA) and the SDO/AIA data. We find that the flare is led by an erupting filament. The interesting result is that the flare produces two MW sources, which lay at loop-top region and the region above that, respectively. Moreover, the brightness temperatures of the two sources, as well as derivative curve of GOES soft X-ray flux, change synchronously with a quasi-period of about 40 seconds. At the peak moments, the spectra of both sources show non-thermal gyrosynchrotron characteristics. The results suggest that quasi-periodic magnetic reconnection accelerates electrons, which then produce quasi-periodic MW radiation near the reconnection region and at the loop-top region.

Presentation materials

movie1.mp4

movie2.mp4

yuankun_WG2.pdf