Role of the background regimes towards the Solar Mean Magnetic Field

TL;DR

This study investigates the sources of the Solar Mean Magnetic Field, concluding that the background magnetic structures contribute predominantly, with 83%, while active regions account for 17%, based on SDO data analysis.

Contribution

It provides a quantitative assessment of the relative contributions of background and active regions to the SMMF using recent solar observation data.

Findings

83% of SMMF is due to background magnetic structures

Active regions contribute only 17% to SMMF

Background structures dominate the origin of SMMF

Abstract

The Solar Mean Magnetic Field (SMMF) is generally defined as disc-averaged line-of-sight (LOS) magnetic field on the sun. The role of active regions and the large-scale magnetic field structures (also called the background) has been debated over past few decades to understand whether the origin of SMMF is either due to the active regions or the background. In this paper, we have investigated the contribution of sunspots, plages, network regions and the background towards the SMMF using data from the SDO-AIA \& HMI, and found that 83\% of the SMMF is due to the background whereas the remaining 17\% originates from the active and network regions.