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arXiv 1004.5085astro-ph.SR
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使用Hinode上的EUV成像光谱仪观察活动区域中的多组分流出

Multiple Component Outflows in an Active Region Observed with the EUV Imaging Spectrometer on Hinode

Paul Bryans, Peter R Young, George A Doschek

摘要:

我们已经使用了日之出航天器上的极紫外成像光谱仪(EIS)来观察活动区域附近的大面积外流。这些外流被认为持续至少6天。的发射线轮廓表明,流出区域是由多个流出的组件,多普勒位移相对于彼此。我们通过对线轮廓施加双高斯拟合来模拟这种情况。这些拟合代表的轮廓明显优于单一高斯拟合的Fe XII和XIII发射线。对于最快的流出组分,我们发现速度高达200 km/s。然而,仍然有拟合线速度和宽度之间的相关性,这表明流出没有完全解决的双高斯拟合和流出可能包括进一步的组件。

英文摘要:

We have used the Extreme Ultraviolet Imaging Spectrometer (EIS) on the Hinode spacecraft to observe large areas of outflow near an active region. These outflows are seen to persist for at least 6 days. The emission line profiles suggest that the outflow region is composed of multiple outflowing components, Doppler-shifted with respect to each other. We have modeled this scenario by imposing a double-Gaussian fit to the line profiles. These fits represent the profile markedly better than a single Gaussian fit for Fe XII and XIII emission lines. For the fastest outflowing components, we find velocities as high as 200 km/s. However, there remains a correlation between the fitted line velocities and widths, suggesting that the outflows are not fully resolved by the double-Gaussian fit and that the outflow may be comprised of further components.

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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