Large-scale soft X-ray loops and their magnetic chirality in both hemispheres

Abstract

The magnetic chirality in the solar atmosphere has been studied based on soft X-ray and magnetic field observations. It is found that some of the 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. This paper provides 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 both the solar hemispheres. © 2010. The American Astronomical Society. All rights reserved.