Properties of Magnetic Neutral Line Gradients and Formation of Filaments

TL;DR

This study examines magnetic field gradients across neutral lines and their relation to filament formation, revealing preferred gradient ranges but no single factor determining filament development.

Contribution

It provides new insights into the magnetic conditions associated with filament formation, highlighting the role of specific gradient ranges.

Findings

Filament formation is enhanced within certain magnetic gradient ranges.

Horizontal magnetic field gradients alone do not determine filament formation.

Magnetic field gradients are correlated with filament presence but are not the sole factor.

Abstract

We investigate gradient of magnetic field across neutral lines (NLs), and compare their properties for NLs with and without the chromospheric filaments. Our results show that there is a range of preferred magnetic field gradients where the filament formation is enhanced. On the other hand, a horizontal gradient of magnetic field across a NL alone does not appear to be a single factor that determines if a filament will form (or not) in a given location.