On the Magnetic and Energy Characteristics of Recurrent Homologous Jets from An Emerging Flux

TL;DR

This study analyzes recurrent homologous jets from emerging magnetic flux, revealing their multi-thermal nature, energetic relationships, and the critical role of magnetic reconnection in their formation and energy release.

Contribution

It provides detailed statistical and observational evidence linking magnetic reconnection with jet energetics and dynamics, emphasizing the importance of free magnetic energy in jet eruptions.

Findings

Jets are multi-thermal with similar temperature and density profiles.

Stronger footpoint intensity correlates with larger jet dimensions.

Magnetic reconnection releases more energy in blowout jets than standard jets.

Abstract

In this paper, we present the detailed analysis of recurrent homologous jets originating from an emerging negative magnetic flux at the edge of an Active Region. The observed jets show multi-thermal features. Their evolution shows high consistence with the characteristic parameters of the emerging flux, suggesting that with more free magnetic energy, the eruptions tend to be more violent, frequent and blowout-like. The average temperature, average electron number density and axial speed are found to be similar for different jets, indicating that they should have been formed by plasmas from similar origins. Statistical analysis of the jets and their footpoint region conditions reveals a strong positive relationship between the footpoint-region total 131 {\AA} intensity enhancement and jets' length/width. Stronger linearly positive relationships also exist between the total intensity enhancement/thermal energy of the footpoint regions and jets' mass/kinetic/thermal energy, with higher cross-correlation coefficients. All the above results, together, confirm the direct relationship between the magnetic reconnection and the jets, and validate the important role of magnetic reconnection in transporting large amount of free magnetic energy into jets. It is also suggested that there should be more free energy released during the magnetic reconnection of blowout than of standard jet events.