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, Lya, 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 minutes is observed in the SXR and high-temperature EUV wavebands, and it may be caused by repeatedly heated plasmas in hot flare loops. A quasiperiod at about 18 minutes 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.
@article{arxiv.2504.08321,
title = {Exploring the origin of multi-periodic pulsations during a white-light flare},
author = {Dong Li and Ding Yuan and Jingye Yan and Xinhua Zhao and Zhao Wu and Jincheng Wang and Zhenyong Hou and Chuan Li and Haisheng Zhao and Libo Fu and Lin Wu and Li Deng},
journal= {arXiv preprint arXiv:2504.08321},
year = {2025}
}
Comments
32 pages, 11 figures, accepted to Journal of Geophysical Research-Space Physics