论文标题
Hα线中的强蓝色不对称性作为预弹性活性
Strong Blue Asymmetry in Hα line as a Preflare Activity
论文作者
论文摘要
太阳耀斑之前的色球活性为太阳耀斑启动提供了重要的线索，但尚未了解。 We report a significant and rapid H$α$ line broadening before the solar flare SOL2011-09-29T18:08, that was detected using the unprecedented high-resolution H$α$ imaging spectroscopy with the Fast Imaging Solar Spectrograph (FISS) installed on the 1.6 m New Solar Telescope (NST) at Big Bear Solar Observatory.The strong H$α$ broadening extends as a blue高达-4.5 a的游览，作为红色偏移至2.0 a，这意味着通过应用云模型的速度在-130 km/s至38 km/s的范围内的混合物，与以前报道的最高的色层运动相当。 H $α$ BlueShift的扩展持续了大约4分钟，并且在时间和空间上与上升的细丝的开始相关，后来与大气成像组件（AIA）在板上太阳能动力学（SDO）上检测到的耀斑的主要阶段有关。在两步喷发模型的背景下，简要讨论了这种h $α$ blueShift扩展的潜在重要性。
Chromospheric activities prior to solar flares provide important clues to solar flare initiation, but are as yet poorly understood. We report a significant and rapid H$α$ line broadening before the solar flare SOL2011-09-29T18:08, that was detected using the unprecedented high-resolution H$α$ imaging spectroscopy with the Fast Imaging Solar Spectrograph (FISS) installed on the 1.6 m New Solar Telescope (NST) at Big Bear Solar Observatory.The strong H$α$ broadening extends as a blue excursion up to -4.5 A and as a red excursion up to 2.0 A, which implies a mixture of velocities in the range of -130 km/s to 38 km/s by applying the cloud model, comparable to the highest chromospheric motions reported before. The H$α$ blueshifted broadening lasts for about 4 minutes, and is temporally and spatially correlated with the start of a rising filament, which is later associated with the main phase of the flare as detected by the Atmosphere Imaging Assembly (AIA) onboard Solar Dynamics Observatory (SDO). The potential importance of this H$α$ blueshifted broadening as a preflare chromospheric activity is briefly discussed within the context of the two-step eruption model.
