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A Comparison of Theoretical mgvi Emission Line Strengths with Active-Region Observations From Serts

机译：理论上的mgvi发射谱线强度与来自草鱼的主动区域观测值的比较

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摘要

R-matrix calculations of electron impact excitation rates in N-like Mg vi are used to derive theoretical electron-density-sensitive emission line ratios involving 2s 22p 3−2s2p 4transitions in the 269–403 Å wavelength range. A comparison of these with observations of a solar active region, obtained during the 1989 flight of the Solar EUV Rocket Telescope and Spectrograph (SERTS), reveals good agreement between theory and observation for the 2s 22p 3 4 S−2s2p 4 4 Ptransitions at 399.28, 400.67, and 403.30 Å, and the 2s 22p 3 2 P−2s2p 4 2 Dlines at 387.77 and 387.97 Å. However, intensities for the other lines attributed to Mg vi in this spectrum by various authors do not match the present theoretical predictions. We argue that these discrepancies are not due to errors in the adopted atomic data, as previously suggested, but rather to observational uncertainties or mis-identifications. Some of the features previously identified as Mg vi lines in the SERTS spectrum, such as 291.36 and 293.15 Å, are judged to be noise, while others (including 349.16 Å) appear to be blended.
机译：利用R矩阵计算N型Mg vi中的电子碰撞激发速率，得出理论上电子密度敏感的发射线比率，该比率涉及2s 2 2p 3 −2s2p 4 跃迁269–403Å波长范围。将它们与1989年太阳EUV火箭望远镜和光谱仪（SERTS）飞行期间获得的太阳活动区域的观测结果进行比较，发现理论与观测2s 2 2p 3 有很好的一致性。 4 S-2s2p 4 4 P跃迁为399.28、400.67和403.30Å，2s 2 2p 3 2 P−2s2p 4 2 Dlines为387.77和387.97Å。但是，各作者在此光谱中归因于Mg vi的其他谱线的强度与当前的理论预测不符。我们认为，这些差异并非如先前所建议的那样，是由于所采用的原子数据中的错误所致，而是由于观测上的不确定性或错误识别所致。先前在SERTS光谱中标识为Mg vi谱线的某些特征（例如291.36和293.15Å）被认为是噪声，而其他特征（包括349.16Å）似乎被混合了。

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    《Solar Physics》 |2002年第2期|265-277|共13页
  • 作者

    F.P. Keenan; M. Mathioudakis; A.C. Katsiyannis; C.A. Ramsbottom; K.L. Bell; R.J. Thomas; J.W. Brosius;

  • 作者单位

    Department of Pure and Applied Physics The Queen's University of Belfast;

    Department of Pure and Applied Physics The Queen's University of Belfast;

    Department of Pure and Applied Physics The Queen's University of Belfast;

    Department of Applied Mathematics and Theoretical Physics The Queen's University of Belfast;

    Department of Applied Mathematics and Theoretical Physics The Queen's University of Belfast;

    Laboratory for Astronomy and Solar Physics Code 682 NASA Goddard Space Flight Center;

    Laboratory for Astronomy and Solar Physics Code 682 NASA Goddard Space Flight CenterRaytheon ITSS;

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