Exploring the Origin of Multi‐Periodic Pulsations During a White‐Light Flare

作者：Dong Li, Ding Yuan, Jingye Yan, Xinhua Zhao, Zhao Wu, Jincheng Wang, Zhenyong Hou, Chuan Li, Haisheng Zhao, Libo Fu, Lin Wu, Li Deng · 发表于：Journal of Geophysical Research Space Physics · 年份：2025 · DOI：10.1029/2025ja033772 · 被引用次数：11 · 研究领域：Solar and Space Plasma Dynamics、Ionosphere and magnetosphere dynamics、Geomagnetism and Paleomagnetism Studies

Abstract We explored the quasi‐periodic pulsations (QPPs) at multiple periods during an X4.0 flare on 2024 May 10 (SOL2024‐05‐10T06:27), which occurred in the complex active region of NOAA 13664. The flare radiation reveals five prominent periods in multiple wavelengths. A 8‐min QPP is simultaneously detected in wavelengths of HXR, radio, UV/EUV, Ly, and white light, which may be associated with nonthermal electrons periodically accelerated by intermittent magnetic reconnection that is modulated by the slow wave. A quasi‐period at 14 min is observed in the SXR and high‐temperature EUV wavebands, and it may be caused by repeatedly heated plasmas in hot flare loops. A quasi‐period at about 18 min is only observed by STIX, with reconstructed SXR images suggesting that the 18‐min period pulsations should be considered as different flares. Meanwhile, a 3‐min QPP is simultaneously detected in wavelengths of HXR, radio, and UV/EUV, which is directly modulated by the slow magnetoacoustic wave leaking from sunspot umbrae. At last, a 2‐min QPP is simultaneously detected in HXR and radio emissions during the pre‐flare phase, which is possibly generated by a quasi‐periodic regime of magnetic reconnection that is triggered by the kink wave.