ASO-S/LST/WST与SDO/HMI观测到的X1.2级耀斑中的四极白光源
Quadrupole White-light Sources in an X1.2 Flare Observed by ASO-S/LST/WST and SDO/HMI
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中文总结 AI 辅助
该研究利用ASO-S/WST与SDO/HMI观测到2023年1月6日X1.2级耀斑的四极白光源结构，明确了其足点的辐射差异及与暗条爆发的关联，深化了对白光耀斑演化的认识。
中文摘要 AI 辅助
我们呈现2023年1月6日一次X1.2级白光耀斑的观测结果，该耀斑展现出罕见的四极白光源结构。该事件由先进天基太阳天文台搭载的白光太阳望远镜（WST；3600埃），以及太阳动力学天文台搭载的日震与磁成像仪（HMI；6173埃）观测到。在WST 3600埃和HMI 6173埃连续谱中，几乎同时识别出四个与耀斑相关的足点（标记为FP1至FP4），它们与四极磁场结构和一次失败的暗条爆发相关联。FP1和FP2的内源性足点在WST/HMI连续谱中表现出约65%/10%的类似增强，而FP3和FP4的外源性足点则呈现较弱的响应。内源性足点在紫外和极紫外波段的响应更早，且与硬X射线（HXR）足点源在空间上重合。两个南部足点（FP2和FP4）的HXR和白光辐射强于其北部对应足点（FP1和FP3），其中FP4独有的特征是在60keV以上存在明显的HXR辐射，而FP3则无此类辐射。值得注意的是，在渐变相期间观测到FP4处WST 3600埃的微弱增强，其时间与暗条物质的回落过程一致。此次X1.2级耀斑呈现出一种新颖的四极白光结构，丰富了我们对白光耀斑的产生与演化的理解。
英文摘要
We present observations of an X1.2 white-light flare on 2023 January 6, which exhibits a rare quadrupolar white-light source configuration. This event was observed by the White-light Solar Telescope (WST; 3600 Å) aboard the Advanced Space-based Solar Observatory and the Helioseismic and Magnetic Imager (HMI; 6173 Å) aboard the Solar Dynamics Observatory. Four flare-related footpoints (labeled as FP1--FP4) were nearly simultaneously identified in both WST 3600 Å and HMI 6173 Å continua, associated with a quadrupolar magnetic configuration and a failed filament eruption. The inner sources of FP1 and FP2 showed a similar enhancement of $\sim$65%/10% in the WST/HMI continuum, while the outer sources of FP3 and FP4 exhibited weaker responses. The inner footpoints had earlier responses in UV and EUV bands and were spatially coincident with the hard X-ray (HXR) footpoint sources. The two southern footpoints (FP2 and FP4) showed stronger HXR and white-light emissions than their northern counterparts (FP1 and FP3), with FP4 uniquely exhibiting a distinct HXR emission above 60 keV, in contrast to the absence of such an emission at FP3. Notably, faint WST 3600 Å enhancements at FP4 were observed during the gradual phase, temporally consistent with the fallback of filament material. This X1.2 flare presents a novel quadrupolar white-light structure, enriching our understanding of the generation and evolution of white-light flares.
