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arXiv 1608.07705astro-ph.SR
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出射通量产生的回流平流喷流的磁场和能量特征

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

Jiajia Liu, Yuming Wang, Robertus Erdelyi, Rui Liu, Scott W. McIntosh, Tingyu Gou, Jun Chen, Kai Liu, Lijuan Liu, Zonghao Pan

摘要:

在本文中,我们提出了详细的分析,经常性的同源射流起源于一个新兴的负磁通量在边缘的活动区。观测到的喷流具有多热特征。它们的演化与出射磁通量的特征参数具有很高的一致性,表明自由磁能越大,喷发越剧烈、频繁和类似井喷。发现不同喷流的平均温度、平均电子数密度和轴向速度是相似的,表明它们应该是由来自相似起源的等离子体形成的。对急流及其足点区条件的统计分析表明,足点区总的131毫米波强度增强与急流的长/宽之间有很强的正相关关系。足点区域的总强度增强/热能与射流质量/动能/热能之间也存在较强的线性正相关关系,具有较高的互相关系数。上述结果证实了磁重联与喷流之间的直接关系,验证了磁重联在向喷流输送大量自由磁能中的重要作用。此外,我们还认为,在井喷的磁重联过程中,释放的自由能应该比标准喷流事件更多。

英文摘要:

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 Å 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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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