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STUDY OF A SMALL-SCALE ERUPTIVE EVENT OBSERVED BY SOHO/SUMER

机译：SOHO / SUMER观测到的小规模喷发事件的研究

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We report on theoretical modeling of an eruptive event observed by SoHO/SUMER in H I Lyβ 1025.72 ?, C II 1037.00 ? and O VI 1037.64 ? emission of the quiet solar atmosphere. We are using two different theoretical approaches. The first one is based on the application of the cloud model to a loop hanging in the solar atmosphere and being irradiated by incident photospheric and chromospheric emissions. This model gives spectral profiles of the hydrogen Lyβ line that are in good quantitative agreement with the observations. The second approach is based on potential-field extrapolation of the photospheric magnetic field as from SoHO/MDI line-of-sight magnetograms into the upper layers of the solar atmosphere. Here, the aim was to find evidence for a possible magnetic reconnection process responsible for the energy release during the observed event. We found that the event is located closely to a separator field line intersecting two separatrix surfaces which evidence the possible magnetic reconnection process. The typical height of the loop systems derived from magnetic field extrapolation is in good agreement with the top height of the eruptive event structure computed from the cloud model. Finally, two possible scenarios of the eruptive event are proposed.
机译：我们报道了SoHO / SUMER在H ILyβ1025.72？，C II 1037.00？中观察到的爆发事件的理论模型。和O VI 1037.64？散发出宁静的太阳气。我们正在使用两种不同的理论方法。第一个是基于将云模型应用到悬挂在太阳大气中并受到光球和色球入射光辐射的环的应用。该模型给出了与观察值定量一致的氢Lyβ谱线谱。第二种方法是基于从SoHO / MDI视线磁图到太阳大气上层的光球磁场的势场外推法。在这里，目的是寻找可能的磁重连过程的证据，该过程可能导致观察到的事件中的能量释放。我们发现该事件位于与两个分隔线表面相交的分隔线磁场附近，这证明了可能的磁重连接过程。由磁场外推得出的回路系统的典型高度与从云模型计算得出的喷发事件结构的最高高度高度吻合。最后，提出了两种可能的爆发事件场景。

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