8-10μm红外波段太阳黑子的振荡周期特性：多数据集分析
Oscillation Period Properties of Sunspots in the 8-10 $μ$m Infrared Band: A Multi-Dataset Analysis
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中文总结 AI 辅助
研究利用AIMS对8-10μm波段六个太阳黑子活动区振荡周期分析，通过四种小波分析方法提取光变曲线，发现加权平均周期更具意义，确定了本影、半影和宁静太阳区域一致周期序列及相关特性，确立该波段为太阳黑子磁对流等的诊断窗口。
中文摘要 AI 辅助
太阳黑子振荡探测太阳大气中的磁等离子体相互作用。我们利用冷湖天文台的精确红外磁场太阳望远镜（AIMS），研究了在8-10μm波段观测到的六个太阳黑子活动区的振荡周期。从本影、半影和宁静太阳区域提取光变曲线。使用四种方法进行小波分析：逐像素平均/中位数聚合，以及分析前的空间平均/中位数。加权平均周期比主导周期更具物理意义，能更好地表示多模振荡。所有数据集都有一致的周期序列：本影（U）<半影（P）<宁静太阳（Q），典型值分别为260-313秒、286-374秒和294-高382秒。通过逐像素平均/中位数和空间中位数方法能100%恢复该模式。空间平均显示有1/6完全、3/6部分和2/6不一致。空间平滑使周期增加高达21%，在本影中最强。所有峰值比均低于0.3（平均0.14±0.03），证实了多模振荡。这些结果将8-10μm波段确立为太阳黑子磁对流和波传播的重要诊断窗口。
英文摘要
Sunspot oscillations probe magnetic-plasma interactions in the solar atmosphere. We investigate oscillation periods in six sunspot active regions observed in the 8-10 um band with the Accurate Infra-red Magnetic-field Solar Telescope (AIMS) at Lenghu Observatory. Light curves were extracted from umbra, penumbra, and quiet Sun regions. Wavelet analysis was applied using four methods: pixel-wise with mean/median aggregation, and spatial mean/median prior to analysis. The weighted mean period is more physically meaningful than the dominant period, better representing multi-mode oscillations. A consistent period sequence holds across all datasets: umbra (U) < penumbra (P) < quiet Sun (Q), with typical values of 260-313 s, 286-374 s, and 294-382 s. This pattern is recovered with 100% consistency by pixel-wise mean/median and spatial median methods. Spatial mean shows 1/6 full, 3/6 partial, and 2/6 inconsistency. Spatial smoothing increases periods by up to 21%, most strongly in the umbra. All peak ratios are below 0.3 (mean 0.14 +/- 0.03), confirming multi-mode oscillations. These results establish the 8-10 um band as a valuable diagnostic window for sunspot magneto-convection and wave propagation.
