Sunrise III/SUSI揭示太阳临边上方延伸且具有光谱结构的Ca II K发射
Sunrise III/SUSI reveals extended and spectrally structured Ca II K emission above the solar limb
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中文总结 AI 辅助
本文利用Sunrise III/SUSI观测到太阳临边外Ca II K发射延伸至6 Mm,发现模拟虽能产生该发射但光谱宽度偏低,需更精细建模。
中文摘要 AI 辅助
Sunrise III/SUSI仪器对Ca II K线核心的临边外发射进行了定点凝视观测,结合了优异的时间分辨率和光谱分辨率。该发射延伸至太阳临边以上6 Mm处,表明存在类似于针状体的临边外结构。在本文中,我们描述了观测到的发射的空间-光谱特性,重点关注Sunrise III/SUSI所分辨出的谱线形状细节,并将观测结果与基于太阳色球层数值模拟的简单模型进行比较。我们发现,该模拟在Mm高度处包含足够多的冷而密的物质以产生临边外发射,但这些特征的光谱宽度略低于观测值,因此需要更详细的建模。
英文摘要
The Sunrise III/SUSI instrument performed a sit-and-stare observation of the off-limb emission in the Ca II K line core, with a combination of excellent temporal and spectral resolution. The emission reaches up to 6 Mm above the solar limb, indicating the existence of off-limb structures akin to spicules. In this letter, we describe the spatio-spectral properties of the observed emission, focusing on the spectral line shape resolved in detail by Sunrise III/SUSI, and compare the observation with simple modeling that relies on a numerical simulation of the solar chromosphere. We find that the simulation contains enough cool and dense material at Mm heights to produce off-limb emission, but that the spectral width of these features is slightly lower than observed, necessitating more detailed modeling.
发表机构
- Institut für Sonnenphysik (KIS)(太阳物理研究所)
- University of Belgrade(贝尔格莱德大学)
- Astronomical Observatory(天文台)
- SUPA School of Physics and Astronomy, University of Glasgow(格拉斯哥大学物理与天文学学院)
- Max-Planck-Institut für Sonnensystemforschung(马克斯·普朗克太阳系研究所)
- Universidad de Mendoza(门多萨大学)
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