论文标题
亚光层磁重新连接可以改变太阳电晕中的元素组成吗？
Can Sub-photospheric Magnetic Reconnection Change the Elemental Composition in the Solar Corona?
论文作者
论文摘要
在恒星的冠状器中，那些具有低初级电势（FIP）的元素的丰富度通常与它们的光电值不同。太阳和太阳型恒星的冠状恒星大多显示出低FIP元件的增强（FIP效应），而更活跃的恒星（如M-Dwarfs）的冠状动脉通常以逆-FIP效应（I-FIP）为特征。在这里，我们在AR 12673中观察到I-FIP效应太阳等血浆的斑块，这是一个高度复杂的β/伽马/三角洲活性区域。我们认为，遮阳的黑子和更具体的强烈的轻桥的遮阳力是观察I-FIP效应等离子体的优先位置。此外，活性区域的磁复杂性和快速出现的主要发作也导致重复和强烈的耀斑。 The induced evaporation of the chromospheric plasma in flare ribbons crossing umbrae enables the observation of four localized patches of I-FIP effect plasma in the corona of AR 12673. These observations can be interpreted in the context of the ponderomotive force fractionation model which predicts that plasma with I-FIP effect composition is created by the refraction of waves coming from below the chromosphere.我们提出，太阳活性区域中产生I-FIP效应血浆的波是通过合并通量系统的亚光层重新连接而产生的。尽管我们只瞥见了这种相互作用在太阳上的斑块中产生的I-FIP效应分馏的特征，但在高度活跃的M-Star上，这可能是主要过程。
Within the coronae of stars, abundances of those elements with low first ionization potential (FIP) often differ from their photospheric values. The coronae of the Sun and solar-type stars mostly show enhancements of low- FIP elements (the FIP effect) while more active stars such as M-dwarfs have coronae generally characterized by the inverse-FIP effect (I-FIP). Here we observe patches of I-FIP effect solar plasma in AR 12673, a highly complex beta/gamma/delta active region. We argue that the umbrae of coalescing sunspots and more specifically strong light bridges within the umbrae, are preferential locations for observing I-FIP effect plasma. Furthermore, the magnetic complexity of the active region and major episodes of fast flux emergence also lead to repetitive and intense flares. The induced evaporation of the chromospheric plasma in flare ribbons crossing umbrae enables the observation of four localized patches of I-FIP effect plasma in the corona of AR 12673. These observations can be interpreted in the context of the ponderomotive force fractionation model which predicts that plasma with I-FIP effect composition is created by the refraction of waves coming from below the chromosphere. We propose that the waves generating the I-FIP effect plasma in solar active regions are generated by sub-photospheric reconnection of coalescing flux systems. Although we only glimpse signatures of I-FIP effect fractionation produced by this interaction in patches on the Sun, on highly active M-stars it may be the dominant process.
