Post-flare evolution of AR 10923 with Hinode/XRT
Post-flare evolution of AR 10923 with Hinode/XRT
复制标题
AR 10923 与 Hinode/XRT 的耀斑后演化
DOI：
10.1051/0004-6361/200913697
复制
发表时间：
2010
影响因子：
6.5
通讯作者：
K. Reeves
中科院分区：
文献类型：
--
作者：
S. Parenti;F. Reale;K. Reeves
上下文。耀斑是一种动态事件，涉及日冕磁拓扑结构的快速变化和能量释放。即使它们可能是局部现象，其起源处的磁扰动也可能在活动区域的更大范围内传播和有效。目标。我们研究了一个耀斑活动区域的时间演化，关于环的形态，温度，和发射测量分布。方法。我们考虑了2006年11月12日C1.1耀斑的Hinode/XRT数据。我们还借助TRACE数据考察了燃烧区形态的演变。XRT滤光器比率用于导出温度和排放测量图及其演变。结果。分析的耀斑包括几个亮斑。我们在增光之前、期间和之后确定了一个连贯的缠绕和放松的环结构序列。虽然由于耀斑峰值的像素饱和，热信息是不完整的，但热图显示出精细的，不断演变的空间结构。温度和发射测量的变化非常详细地显示出来，我们能够探测到靠近适当耀斑区域的较大回路的二次加热。最后我们估计了在耀斑衰减过程中这些耀斑环释放的能量。
Context. Flares are dynamic events which involve rapid changes in coronal magnetic topology end energy release. Even if they may be localized phenomena, the magnetic disturbance at their origin may propagate and be effective in a larger part of the active region. Aims. We investigate the temporal evolution of a flaring active region with respect to the loops morphology, the temperature, and emission measure distributions. Methods. We consider Hinode/XRT data of a the 2006 November 12th C1.1 flare. We inspect the evolution of the morphology of the flaring region also with the aid of TRACE data. XRT filter ratios are used to derive temperature and emission measure maps and evolution. Results. The analyzed flare includes several brightenings. We identify a coherent sequence of tangled and relaxed loop structures before, during, and after the brightenings. Although the thermal information is incomplete because of pixel saturation at the flare peak, thermal maps show fine, evolving spatial structuring. Temperature and emission measure variations show up in great detail, and we are able to detect a secondary heating of larger loops close to the proper flaring region. Finally we estimate the amount of energy released in these flaring loops during the flare decay.