Energy exchanges in reconnection outflows

TL;DR

This paper uses large-scale simulations to analyze how energy is exchanged during reconnection outflows, revealing that the most significant energy transfer occurs in destabilized jet regions rather than at the reconnection site.

Contribution

It provides detailed simulation-based insights into energy exchange processes in reconnection outflows, highlighting the regions of maximum energy transfer.

Findings

Largest energy exchange occurs in destabilized jet regions.

Chaotic magnetic fields develop due to secondary reconnection.

Energy transfer is not centered at the reconnection site.

Abstract

Reconnection outflows are highly energetic directed flows that interact with the ambient plasma or with flows from other reconnection regions. Under these conditions the flow becomes highly unstable and chaotic, as any flow jets interacting with a medium. We report here massively parallel simulations of the two cases of interaction between outflow jets and between a single outflow with an ambient plasma. We find in both case the development of a chaotic magnetic field, subject to secondary reconnection events that further complicate the topology of the field lines. The focus of the present analysis is on the energy balance. We compute each energy channel (electromagnetic, bulk, thermal, for each species) and find where the most energy is exchanged and in what form. The main finding is that the largest energy exchange is not at the reconnection site proper but in the regions where the outflowing jets are destabilized.