I. Jet Formation and Evolution due to 3D Magnetic Reconnection

TL;DR

This study uses 3D resistive MHD simulations to demonstrate that magnetic reconnection can generate jets resembling Type II spicules in the solar atmosphere, highlighting the role of Lorentz force in jet acceleration.

Contribution

The paper presents a novel 3D simulation approach linking magnetic reconnection to the formation of Type II spicule-like jets in the solar atmosphere.

Findings

Jets show velocities up to 100 km/s.

Jet morphology and lifetime match Type II spicules.

Lorentz force is key in jet acceleration.

Abstract

Using simulated data-driven three-dimensional resistive MHD simulations of the solar atmosphere, we show that magnetic reconnection can be responsible of the formation of jets with characteristic of Type II spicules. For this, we numerically model the photosphere-corona region using the C7 equilibrium atmosphere model. The initial magnetic configuration is a 3D potential magnetic field, extrapolated up to the solar corona region from a dynamic realistic simulation of solar photospheric magnetoconvection model which is mimicking quiet-Sun. In this case we consider a uniform and constant value of the magnetic resistivity of $12.56 ~\Omega~{\rm m}$. We have found that formation of the jets depends on the Lorentz force, which helps to accelerate the plasma upwards. Analyzing various properties of the jet dynamics, we found that the jet structure shows Doppler shift near to regions with high vorticity. The morphology, upward velocity, covering a range up to 100 $\rm km$ $\rm s^{-1}$, and life-time of the estructure, bigger than 100 ${\rm s}$, are similar to those expected for Type II spicules.