论文标题
对安静的太阳能电晕的冲动加热贡献的第一个无线电证据
First radio evidence for impulsive heating contribution to the quiet solar corona
论文作者
论文摘要
这封信探讨了基于纳米洛尔的模型在加热安静的阳光电晕的相关性。使用来自Murchison Widefield阵列的Metrewave数据，我们首先成功地检测了冲动性排放到$ \ sim $ MSFU的通量密度，比以前的尝试弱了两个数量级。这些冲动的排放量具有$ \ Lessim 1 $ s的持续时间，并且在整个安静的太阳能电晕中都存在。这些冲动性排放在给定区域的分数时间为$ \ lyssim 10 \％$。这些冲动性排放的直方图遵循PowerLaw分布，并显示了小时标准的聚类的迹象。我们对必须倾倒在电晕中产生这些脉冲排放的能量的估计与冠状加热要求一致。此外，这些冲动性排放的统计特性与帕克太阳能探针（PSP）最近确定的磁折回的统计特性非常相似。我们希望这项工作将引起人们对将这些弱的冲动排放与沉积在电晕中的能量，从冠状加热的角度使用的物理有趣数量的重新兴趣，并探索了它们与PSP观察到的磁换回的关系。
This letter explores the relevance of nanoflare based models for heating the quiet sun corona. Using metrewave data from the Murchison Widefield Array, we present the first successful detection of impulsive emissions down to flux densities of $\sim$mSFU, about two orders of magnitude weaker than earlier attempts. These impulsive emissions have durations $\lesssim 1$s and are present throughout the quiet solar corona. The fractional time occupancy of these impulsive emissions at a given region is $\lesssim 10\%$. The histograms of these impulsive emissions follow a powerlaw distribution and show signs of clustering at small timescales. Our estimate of the energy which must be dumped in the corona to generate these impulsive emissions is consistent with the coronal heating requirements. Additionally, the statistical properties of these impulsive emissions are very similar to those recently determined for magnetic switchbacks by the Parker Solar Probe (PSP). We hope that this work will lead to a renewed interest in relating these weak impulsive emissions to the energy deposited in the corona, the quantity of physical interesting from a coronal heating perspective, and explore their relationship with the magnetic switchbacks observed by the PSP.
