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arXiv 1909.13619astro-ph.SR
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太阳黑子半影区的超强光球磁场

Superstrong photospheric magnetic fields in sunspot penumbrae

A. Siu-Tapia, A. Lagg, M. van Noort, M. Rempel, S. K. Solanki

摘要:

最近,有一些报告,异常强大的光球磁场(可达到超过7 kG的值)推断出日出SOT/SP太阳黑子观测半影区域内。这些超强的半影场甚至比有记录以来最强的本影场还要大,似乎与超音速下降流有关。这种领域的发现一直是有争议的,因为他们似乎只出现在空间耦合反演进行。在这里,我们调查和讨论的可靠性,这些调查结果通过详细研究观察到的光谱与特别强的磁场在活动区10930的半影的内边缘。我们应用经典的诊断方法和不同的模型大气的各种反演观测到的斯托克斯轮廓在两个选定的像素与超强磁场,并比较结果与磁流体动力学模拟的太阳黑子的半影包含局部区域与强场(近5 kG在$τ=1$)与超音速下降流。

英文摘要:

Recently, there have been some reports of unusually strong photospheric magnetic fields (which can reach values of over 7 kG) inferred from Hinode SOT/SP sunspot observations within penumbral regions. These superstrong penumbral fields are even larger than the strongest umbral fields on record and appear to be associated with supersonic downflows. The finding of such fields has been controversial since they seem to show up only when spatially coupled inversions are performed. Here, we investigate and discuss the reliability of those findings by studying in detail observed spectra associated with particularly strong magnetic fields at the inner edge of the penumbra of active region 10930. We apply classical diagnostic methods and various inversions with different model atmospheres to the observed Stokes profiles in two selected pixels with superstrong magnetic fields, and compare the results with a magnetohydrodynamic simulation of a sunspot whose penumbra contains localized regions with strong fields (nearly 5 kG at $τ=1$) associated with supersonic downflows...

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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