AI 中文总结
研究太阳和恒星耀斑中QPPs，通过分析太阳轨道器/EUI的2146次EUV增亮及SDO/AIA的300次EUV太阳耀斑，发现EUV增亮和耀斑的阻尼时间与振荡周期遵循共同幂律标度，表明QPPs受共同物理机制支配。
AI 中文摘要
近期高时空分辨率的极紫外（EUV）成像观测表明，准周期脉动（QPPs）作为太阳和恒星耀斑中脉冲能量释放的普遍特征，也存在于称为EUV增亮的小得多尺度的日冕事件中。不同空间和能量尺度上观测到的QPPs是否有共同物理起源仍是未解之谜。本文分析了太阳轨道器/EUI观测到的2146次EUV增亮以及太阳动力学天文台/大气成像组件（SDO/AIA）观测到的300次EUV太阳耀斑，识别出185次增亮和89次耀斑呈现出具有统计学意义的阻尼QPPs。研究表明，EUV增亮和EUV太阳耀斑的阻尼时间与振荡周期之间的关系遵循共同的幂律标度，与之前报道的涵盖太阳和恒星耀斑的X射线QPPs一致。这种标度在广泛的能量和尺度范围内的持续存在表明QPPs受共同的潜在物理机制支配。
英文摘要
Recent high spatial and temporal resolution extreme-ultraviolet (EUV) imaging observations have revealed that quasi-periodic pulsations (QPPs), a ubiquitous signature of impulsive energy release in solar and stellar flares, are also present in much smaller-scale coronal events known as EUV brightenings. Whether QPPs observed across such disparate spatial and energetic scales share a common physical origin remains an open question. Here we analyse 2,146 EUV brightenings observed with Solar Orbiter/EUI and 300 EUV solar flares observed with SDO/AIA, identifying 185 brightenings and 89 flares exhibiting statistically significant damped QPPs. We show that the relationship between damping time and oscillation period follows a common power-law scaling for EUV brightenings and EUV solar flares, consistent with previously reported X-ray QPPs spanning both solar and stellar flares. The persistence of this scaling over a wide range of energies and scales suggests that QPPs are governed by a common underlying physical mechanism.
Comments9 pages, 4 figures, accepted for publication in ApJL
