Observations and Numerical Models of Solar Coronal Heating Associated with Spicules
Observations and Numerical Models of Solar Coronal Heating Associated with Spicules
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DOI：
10.3847/2041-8213/aa7fb4
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发表时间：
2017-08
期刊：
影响因子：
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通讯作者：
B. Pontieu;I. Moortel;J. Martínez-Sykora;S. McIntosh
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文献类型：
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作者：
B. Pontieu;I. Moortel;J. Martínez-Sykora;S. McIntosh
针状体被认为是日冕质量和能量平衡的重要贡献者。虽然以前的观测提供了一个短暂的瞬态增亮的日冕，与针状体，这些意见一直有争议，是一个激烈的辩论的主题，无论是在建模和观测方面。因此，尚不清楚等离子体是否与针状体一起被加热到日冕温度。我们使用高分辨率观测色球层和过渡区（TR）与界面区域成像光谱仪和日冕与大气成像组件板上的太阳动力学天文台显示的证据，形成的日冕结构与针状物质抛射和加热等离子体TR和日冕温度。我们的观察结果表明，一个显着的一部分，与plage地区的高度动态的环扇环境可能是形成这样的新冠链，一个过程，以前被解释为传播的瞬态传播日冕扰动的结果。我们的观测得到了2.5D辐射MHD模拟的支持，该模拟显示了与针状体相关的日冕温度加热。我们的研究结果表明，加热和强大的流量发挥了重要的作用，在保持环扇的子结构，除了波渗透到这个低日冕环境。
Spicules have been proposed as significant contributors to the mass and energy balance of the corona. While previous observations have provided a glimpse of short-lived transient brightenings in the corona that are associated with spicules, these observations have been contested and are the subject of a vigorous debate both on the modeling and the observational side. Therefore, it remains unclear whether plasma is heated to coronal temperatures in association with spicules. We use high-resolution observations of the chromosphere and transition region (TR) with the Interface Region Imaging Spectrograph and of the corona with the Atmospheric Imaging Assembly on board the Solar Dynamics Observatory to show evidence of the formation of coronal structures associated with spicular mass ejections and heating of plasma to TR and coronal temperatures. Our observations suggest that a significant fraction of the highly dynamic loop fan environment associated with plage regions may be the result of the formation of such new coronal strands, a process that previously had been interpreted as the propagation of transient propagating coronal disturbances. Our observations are supported by 2.5D radiative MHD simulations that show heating to coronal temperatures in association with spicules. Our results suggest that heating and strong flows play an important role in maintaining the substructure of loop fans, in addition to the waves that permeate this low coronal environment.