基于极紫外与Hα联合观测的太阳喷流多热结构研究
Multi-thermal Structure of Solar Jets based on Combined EUV and Ha Observations
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中文总结 AI 辅助
本研究联合EUV与Hα观测70个太阳喷流事件，发现冷热组分源于统一喷流的不同温度部分，约80%涉及迷你暗条爆发，暗条及磁场曲率是导致形态差异的关键因素。
中文摘要 AI 辅助
本研究通过结合极紫外（EUV）与Hα观测，探究太阳喷流的多热结构，旨在解决冷热组分是否源自同一喷流、其形态异同以及迷你暗条的作用等问题。我们分析了2023年5月25日至2026年1月15日期间，由大气成像组件（AIA）和中文Hα太阳探测器（CHASE）同时观测到的70个喷流事件。根据两个波段在长度和宽度上是否存在显著差异，将事件分为四类；并采用非线性无力场外推法来检查磁场。我们发现，冷热组分对应统一喷流的不同温度部分，表现出时空重合和运动学同步。在形态上，30%的事件在长度/宽度上无显著差异，37%在一个维度上存在差异，33%在两个维度上均存在差异。约80%的事件涉及迷你暗条爆发；带有暗条的喷流更常表现出形态差异（暗条不膨胀、热壳厚度、动能不足或物质稀疏化）。相比之下，无暗条的喷流往往呈现一致的形态；当出现差异时，主要与小磁场曲率有关，这会减小磁张力并导致冷物质加速不足。这些结果凸显了热、动力学和磁因素在塑造喷流形态中的复杂相互作用。
英文摘要
This study investigates the multi-thermal structure of solar jets by combining extreme ultra-violet (EUV) and Ha observations, addressing whether cool and hot components originate from the same jet, their morphological similarities and differences, and the role of mini-filaments. We analyze 70 jet events simultaneously observed by Atmospheric Imaging Assembly (AIA) and Chinese Ha Solar Explorer (CHASE) from 2023 May 25 to 2026 January 15. The events are classified into four types based on whether or not there are significant differences between the two wavebands in terms of length and width; nonlinear force-free field extrapolations are applied to examine magnetic fields. We find that the cool and hot components correspond to different temperature parts of a unified jet, showing spatiotemporal coincidence and kinematic synchronization. Morphologically, 30% show no significant difference in length/width, 37% differ in one dimension, and 33% differ in both. About 80% involve mini-filament eruptions; jets with filaments more often exhibit morphological differences (filament non-expansion, hot shell thickness, insufficient kinetic energy, or material rarefaction). In contrast, jets without filaments tend to show consistent morphologies; when discrepancies occur, they are mainly linked to small magnetic field curvature, which reduces magnetic tension and leads to less acceleration of cool material. These results highlight the complex interaction between thermal, dynamic, and magnetic factors in shaping jet morphology.
发表机构
- School of Astronomy and Space Science, Nanjing University（南京大学天文与空间科学学院）
- Key Laboratory of Modern Astronomy and Astrophysics (Nanjing University), Ministry of Education（现代天文学和天体物理学教育部重点实验室（南京大学））
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