Electron acceleration and transport in the 2023-03-06 solar flare

TL;DR

This study analyzes the electron acceleration and transport mechanisms in a 2023 solar flare using multi-wavelength observations and 3D modeling, revealing details of electron behavior in different flare phases.

Contribution

It provides a detailed 3D model of electron acceleration and transport in a recent solar flare, integrating microwave and X-ray data for the first time.

Findings

Electrons are trapped near the top of large flaring loops during the second phase.

Coulomb collisions significantly influence the evolution of trapped electrons.

The flare involved two distinct emission phases with different loop structures.

Abstract

We investigated in detail the M5.8 class solar flare that occurred on 2023-03-06. This flare was one of the first strong flares observed by the Siberian Radioheliograph in the microwave range and the Advanced Space-based Solar Observatory in the X-ray range. The flare consisted of two separate flaring events (a "thermal" and a "cooler" ones), and was associated with (and probably triggered by) a filament eruption. During the first part of the flare, the microwave emission was produced in an arcade of relatively short and low flaring loops. During the second part of the flare, the microwave emission was produced by energetic electrons trapped near the top of a large-scale flaring loop; the evolution of the trapped electrons was mostly affected by the Coulomb collisions. Using the available observations and the GX Simulator tool, we created a 3D model of the flare, and estimated the parameters of the energetic electrons in it.