Dependence of reconnection heating and jet dynamics on accumulated magnetic stress

Determine how the accumulation of free magnetic energy, represented by varying the critical current threshold for anomalous magnetic resistivity in coronal flux-tube reconnection, affects the resulting heating and outflow velocity.

Background

The simulations vary the critical current above which anomalous magnetic resistivity is activated. This parameter controls how much magnetic stress accumulates before reconnection, thereby affecting the timing and characteristics of the resulting nanoflare heating and nanojet outflows.

The paper explicitly identifies the relationship between accumulated magnetic energy, dissipated heating, and outflow velocity as unresolved, while noting that previous studies indicate that the precise resistivity value may not be decisive for reconnection-induced heating in the considered regime. The issue is therefore relevant to determining how magnetic-energy storage translates into thermal and kinetic energy during coronal reconnection events.

References

We carry out our investigation by changing the critical current above which magnetic resistivity switches on, to study how heating and velocity evolve as more free magnetic energy accumulates. While this remains an open question, other studies have already shown that the actual value of magnetic resistivity is not crucial in determining reconnection-induced heating in our regime \citep{1996JGR...10113445G, 2012ApJ...747..109N}.

MHD Modelling of magnetic reconnection heating and jets in the solar corona  (2609.10205 - Pagano et al., 9 Sep 2026) in Section 4, Discussion and conclusions, immediately after the discussion of varying the critical-current threshold