标题： 日冕暗化与CME-耀斑的关联性质 显示英文标题

标题： The Nature of CME-Flare Associated Coronal Dimming

摘要： 日冕物质抛射（CME）常常伴随着日冕消光现象，在极紫外（EUV）和软X射线观测中表现明显。消光的位置有时被认为是喷发磁绳的足点映射。随着发射物质在日冕中膨胀，等离子体密度的减少导致光谱和辐照测量中观察到的辐射减弱。因此，消光的特征可能反映了CME在其喷发早期阶段的特性。在这项研究中，我们分析了2011年12月26日的耀斑、CME和日冕消光事件。我们使用太阳动力学观测台（SDO）的大气成像组件（AIA）的数据来观测盘面的消光，并通过太阳地球关系天文台（STEREO）上的EUVI、COR1和COR2仪器拍摄的图像来获取在边缘观测到的相关CME的高度和速度。我们还从耀斑观测中测量了磁重联速率。消光发生在几个靠近耀斑带的位置，并且在多个EUV波段中被观测到。快速消光开始于快速重联和CME加速之后，并且其演化很好地追踪了CME的高度和耀斑重联。消光的空间分布表现出深消光的核心区域以及快速增长的特点，其光曲线与CME的高度剖面近似呈线性比例关系。通过消光分析，我们推断了CME的膨胀过程，并估算了CME的性质。 显示英文摘要

摘要： Coronal mass ejections (CMEs) are often accompanied by coronal dimming evident in extreme ultraviolet (EUV) and soft X-ray observations. The locations of dimming are sometimes considered to map footpoints of the erupting flux rope. As the emitting material expands in the corona, the decreased plasma density leads to reduced emission observed in spectral and irradiance measurements. Therefore, signatures of dimming may reflect properties of CMEs in the early phase of its eruption. In this study, we analyze the event of flare, CME, and coronal dimming on December 26, 2011. We use the data from the Atmospheric Imaging Assembly (AIA) on Solar Dynamics Observatories (SDO) for disk observations of the dimming, and analyze images taken by EUVI, COR1, and COR2 onboard the Solar Terrestrial Relations Observatories to obtain the height and velocity of the associated CMEs observed at the limb. We also measure magnetic reconnection rate from flare observations. Dimming occurs in a few locations next to the flare ribbons, and it is observed in multiple EUV passbands. Rapid dimming starts after the onset of fast reconnection and CME acceleration, and its evolution well tracks the CME height and flare reconnection. The spatial distribution of dimming exhibits cores of deep dimming with a rapid growth, and their light curves are approximately linearly scaled with the CME height profile. From the dimming analysis, we infer the process of the CME expansion, and estimate properties of the CME.