Large Scale Soft X-ray Loops And Their Magnetic Chirality In Both Hemispheres

TL;DR

This study investigates large-scale twisted soft X-ray loops in the solar atmosphere, revealing their magnetic helicity and its hemispheric variations, providing observational evidence of magnetic field helicity and its transfer from subatmospheric layers.

Contribution

It presents new observational evidence of large-scale magnetic helicity in the solar atmosphere and its hemispheric asymmetry, linking soft X-ray loops to magnetic field helicity transfer.

Findings

Large-scale twisted soft X-ray loops persist for months.

Magnetic helicity in loops is opposite to the hemispheric rule.

Helicity transfer from subatmosphere supports loop formation.

Abstract

The magnetic chirality in solar atmosphere has been studied based on the soft X-ray and magnetic field observations. It is found that some of large-scale twisted soft X-ray loop systems occur for several months in the solar atmosphere, before the disappearance of the corresponding background large-scale magnetic field. It provides the observational evidence of the helicity of the large-scale magnetic field in the solar atmosphere and the reverse one relative to the helicity rule in both hemispheres with solar cycles. The transfer of the magnetic helicity from the subatmosphere is consistent with the formation of large-scale twisted soft X-ray loops in the both solar hemispheres.