On the role of repetitive magnetic reconnections in evolution of magnetic flux-ropes in solar corona

TL;DR

This paper investigates how repeated magnetic reconnections, supported by Parker's theorem, can autonomously drive the formation and evolution of magnetic flux-ropes in the solar corona, aligning with observed phenomena.

Contribution

It demonstrates through numerical simulations that recurrent reconnections can govern flux-rope emergence, providing a physical mechanism consistent with solar observations.

Findings

Recurrent reconnections lead to flux-rope formation and ascent.

Simulation results match observed flux-rope morphology.

Magnetic topology changes align with solar coronal features.

Abstract

Parker's magnetostatic theorem extended to astrophysical magnetofluids with large magnetic Reynolds number supports ceaseless regeneration of current sheets and hence, spontaneous magnetic reconnections recurring in time. Consequently, a scenario is possible where the repeated reconnections provide an autonomous mechanism governing emergence of coherent structures in astrophysical magnetofluids. In this work, such a scenario is explored by performing numerical computations commensurate with the magnetostatic theorem. In particular, the computations explore the evolution of a flux-rope governed by repeated reconnections in a magnetic geometry resembling bipolar loops of solar corona. The revealed morphology of the evolution process, including onset and ascent of the rope, reconnection locations and the associated topology of the magnetic field lines, agrees with observations, and thus substantiates physical realisability of the advocated mechanism.