所有的耀斑都有白光发射吗？
Do all Flares have White Light Emission?
摘要：
本文介绍了瑞典太阳望远镜对太阳活动区（NOAA 10969）进行的高节奏多波长光学观测。白光连续数据的差分成像揭示了白光增亮，持续时间为2分钟，与同时间和同空间的C2.0耀斑事件有关。在白光图像中观察到的耀斑核心直径为300公里，因此低于大多数天基望远镜的分辨率极限。连续发射是目前仅在脉冲阶段的耀斑，色球发射的影响随后延迟约2分钟。本地化的耀斑发射峰值在300%以上的静态流量。由于瑞典太阳望远镜的高空间分辨率，这种大而严格限制的发射增加只能被解析。对来自同步MDI数据的视线磁场的调查表明，连续增亮位于非常接近磁极性反转线的位置。此外，一个H-α耀斑带是沿着一个快速磁能变化的区域定向的，带的足点在整个耀斑持续时间内与观察到的白光保持共空间。观测到的耀斑参数进行了比较，目前的观测和理论模型的M-和X-级事件，我们确定所观察到的白光发射是由辐射回暖。我们认为白光的产生是所有太阳耀斑的共同特征。
英文摘要：
High-cadence, multiwavelength optical observations of a solar active region (NOAA 10969), obtained with the Swedish Solar Telescope, are presented. Difference imaging of white light continuum data reveals a white light brightening, 2 min in duration, linked to a co-temporal and co-spatial C2.0 flare event. The flare kernel observed in the white light images has a diameter of 300 km, thus rendering it below the resolution limit of most space-based telescopes. Continuum emission is present only during the impulsive stage of the flare, with the effects of chromospheric emission subsequently delayed by approximately 2 min. The localized flare emission peaks at 300% above the quiescent flux. This large, yet tightly confined, increase in emission is only resolvable due to the high spatial resolution of the Swedish Solar Telescope. An investigation of the line-of-sight magnetic field derived from simultaneous MDI data shows that the continuum brightening is located very close to a magnetic polarity inversion line. Additionally, an H-alpha flare ribbon is directed along a region of rapid magnetic energy change, with the footpoints of the ribbon remaining co-spatial with the observed white light brightening throughout the duration of the flare. The observed flare parameters are compared with current observations and theoretical models for M- and X-class events and we determine the observed white-light emission is caused by radiative back warming. We suggest that the creation of white-light emission is a common feature of all solar flares.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
