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arXiv 1801.01307astro-ph.SR
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太阳光球到日冕亮点的同步观测

Synchronized Observations of Bright Points from the Solar Photosphere to Corona

Ehsan Tavabi

摘要:

太阳大气中最重要的特征之一是磁网络及其与过渡区(TR)和日冕亮度的关系。了解能量是如何进入日冕的,以及它是如何沿着深光球层和色球层之间的磁力线穿过TR和日冕的。一个很好的运输代理是界面区域成像光谱仪光栅扫描和成像观测近紫外和远紫外发射通道,具有高时空分辨率。在这项研究中,我们专注于与IRIS观察到的安静的太阳。Si IV、C II和Mg II k线的高信噪比和强发射强度的数据在TR亮网点中显示出高相关性。将IRIS强度图和多普勒图的结果与太阳动力学观测站(SDO)上的大气成像仪(AIA)和日震磁成像仪(HMI)的结果进行了比较。平均网络强度剖面显示出与AIA日冕通道的强相关性。此外,我们应用HMI的磁网络同步观测,发现太阳大气层各级网络亮点之间存在很强的关系。这些网络元素的特征表现出高多普勒速度区域和大的磁特征。日冕亮点发射的占主导地位的部分,伴随着光球中的磁源,表明磁场集中在网络rophiles可以帮助内外太阳大气之间的耦合。

英文摘要:

One of the most important features in the solar atmosphere is magnetic network and its rela- tionship with the transition region (TR), and coronal brightness. It is important to understand how energy is transported into the corona and how it travels along the magnetic-field lines be- tween deep photosphere and chromosphere through the TR and corona. An excellent proxy for transportation is the Interface Region Imaging Spectrograph (IRIS) raster scans and imaging observations in near-ultraviolet (NUV) and far-ultraviolet (FUV) emission channels with high time-spatial resolutions. In this study, we focus on the quiet Sun as observed with IRIS. The data with high signal to noise ratio in Si IV, C II and Mg II k lines and with strong emission intensities show a high correlation in TR bright network points. The results of the IRIS intensity maps and dopplergrams are compared with those of Atmo- spheric Imaging Assembly (AIA) and Helioseismic and Magnetic Imager (HMI) instruments onboard the Solar Dynamical Observatory (SDO). The average network intensity profiles show a strong correlation with AIA coronal channels. Furthermore, we applied simultaneous observations of magnetic network from HMI and found a strong relationship between the network bright points in all levels of the solar atmosphere. These features in network elements exhibited high doppler velocity regions and large mag- netic signatures. A dominative fraction of corona bright points emission, accompanied by the magnetic origins in photosphere, suggest that magnetic-field concentrations in the network rosettes could help couple between inner and outer solar atmosphere.

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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