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EUV Spectroscopic Observations of Spray Ejecta from an X2 Flare

机译：X2火炬喷出物的EUV光谱观察

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摘要

An X2.3 class flare was reported on 10 April 2001 in AR 9415. A halo coronal mass ejection (CME) was associated with this flare. The Coronal Diagnostic Spectrometer (CDS) on board the Solar and Heliospheric Observatory (SOHO), which was running in its daily synoptic mode, recorded a very high-velocity ejection of plasma associated with this activity. The spatial scanning and spectral capabilities of CDS allow the measurement of both transverse and line-of-sight velocities. Components of the plasma, as seen in emission from O v at around 2.5×105 K, reached transverse velocities in excess of 800 km s−1. The nature of the spectral line profiles suggests that a rotational motion of ± 350 km s−1 was superimposed upon the general outward expansion of approximately 150 km s−1. The ejection detected using CDS was found to have a constant acceleration and is thought to be a spray of plasma with a helical structure driven by the magnetic topology.
机译：2001年4月10日在AR 9415上报告了X2.3级耀斑。该耀斑伴有晕冕冠状物质抛射（CME）。太阳和日球天文台（SOHO）上的日冕诊断光谱仪（CDS）每天以天气模式运行，记录了与此活动相关的非常高速的血浆喷射。 CDS的空间扫描和光谱功能可以测量横向和视线速度。如在2.5×105 K处从O v发射出的那样，等离子体的成分达到的横向速度超过800 km s-1 。谱线轮廓的性质表明，在大约150 km s-1 的总体向外扩展上，叠加了±350 km s-1 的旋转运动。发现使用CDS检测到的喷射具有恒定的加速度，并被认为是具有由磁拓扑结构驱动的螺旋结构的等离子体喷雾。

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  • 来源
    《Solar Physics》 |2002年第2期|359-381|共23页
  • 作者

    C.D. Pike; H.E. Mason;

  • 作者单位

    Space Science Department Rutherford Appleton Laboratory;

    Department of Applied Mathematics and Theoretical Physics;

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  • 正文语种 eng
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