# Simulated evolution of three-dimensional magnetic nulls leading to generation of cylindrically-shaped current sheets

## TL;DR

This study uses magnetohydrodynamic simulations to explore how 3D magnetic nulls naturally evolve into cylindrical current sheets through magnetic reconnection and field line deformation.

## Contribution

It demonstrates the formation of cylindrically-shaped current sheets near 3D magnetic nulls in a simulated magnetofluid environment, revealing new morphological insights.

## Key findings

- Current sheets form near 3D magnetic nulls.
- Cylindrical current sheet morphology observed.
- Magnetic reconnection drives field line deformation.

## Abstract

The performed magnetohydrodynamic simulation examines the importance of magnetofluid evolution which naturally leads to current sheets in the presence of three-dimensional (3D) magnetic nulls. Initial magnetic field is constructed by superposing a 3D force-free field on a constant axial magnetic field. The initial field supports 3D magnetic nulls having classical spine axis and dome-shaped fan surface; and exerts non-zero Lorentz force on the magnetofluid. Importantly, the simulation identifies the development of current sheets near the 3D magnetic nulls. The morphology of the current sheets is similar to a cylindrical surface where the surface encloses the spine axis. The development is because of favorable deformation of magnetic field lines constituting the dome-shaped fan surface. The deformation of field lines is found to be caused from the flow generated by magnetic reconections at current sheets which are located away from the cylindrically-shaped current sheets.