论文标题
磁通绳的辐射喷发的辐射磁流体动力学模拟：磁性结构和血浆热力学
Radiative Magnetohydrodynamic Simulation of the Confined Eruption of a Magnetic Flux Rope: Magnetic Structure and Plasma Thermodynamics
论文作者
论文摘要
人们普遍认为，磁通绳是太阳喷发的关键结构。但是，他们可观察的对应物尚不清楚。我们研究了与弹性活性区域的综合辐射磁性水力动力学模拟相关的耀斑，尤其是侧重于涉及喷发的血浆的热力学特性及其与磁通绳的关系。先前存在的通量绳，它带有冷和致密的血浆，在喷发爆发前会出现准静态。在此阶段，通量绳在极端紫外线（EUV）发射中没有显示明显的特征。发作发作后，在爆发的通量绳周围产生一个薄的“电流壳”。此外，在通量绳下形成了一个电流纸，其中两组磁拱形重新连接并创建一组漏斗后环。将“当前外壳”，电流板和轻便后环内的等离子体加热到10 mk以上。漏斗后的回路产生了丰富的软X射线发射。同时，将通量绳中的大多数等离子体加热至约1 mk，而通量绳的主体则表现为较冷的EUV Pass带（例如AIA 171Å〜通道）中的明亮拱门。
It is widely believed that magnetic flux ropes are the key structure of solar eruptions; however, their observable counterparts are not clear yet. We study a flare associated with flux rope eruption in a comprehensive radiative magnetohydrodynamic simulation of flare-productive active regions, especially focusing on the thermodynamic properties of the plasma involved in the eruption and their relation to the magnetic flux rope. The pre-existing flux rope, which carries cold and dense plasma, rises quasi-statically before the eruption onsets. During this stage, the flux rope does not show obvious signatures in extreme ultraviolet (EUV) emission. After the flare onset, a thin `current shell' is generated around the erupting flux rope. Moreover, a current sheet is formed under the flux rope, where two groups of magnetic arcades reconnect and create a group of post-flare loops. The plasma within the `current shell', current sheet, and post-flare loops are heated to more than 10 MK. The post-flare loops give rise to abundant soft X-ray emission. Meanwhile a majority of the plasma hosted in the flux rope is heated to around 1 MK, and the main body of the flux rope is manifested as a bright arch in cooler EUV passbands such as AIA 171 Å~channel.
