Type I Solar Radio Bursts Modulated by Solar Flares

IF 2.4 3区物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS

Solar Physics Pub Date : 2026-09-30 DOI:10.1007/s11207-026-02736-9

Yutong Li, Chuanyang Li, Yanke Tang, Ning Gai, Zichuan Li, Zhe Cui, Yang Gao, Yifan Wang, Xiaodong Xu, Xiaodi Huo

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引用次数: 0

Abstract

Type I solar radio bursts (noise storms) are persistent meter-wave nonthermal emissions above active regions, with their occurrence and properties closely related to the local magnetic configuration and nonthermal electron acceleration. This study examines a type I noise storm on 24 December 2023 and its relation to flare activity. The noise-storm source was co-spatial with active region (AR) 3529 and showed frequency-dependent spatial dispersion. The associated M2.9 flare strongly modulated the emission, with the storm intensity decreasing at flare onset, recovering afterward, and shifting to higher frequencies. Based on multiwavelength observations, we suggest that pre-flare small-scale reconnection supplied nonthermal electrons to overlying closed magnetic structures and maintained the storm. During the flare, magnetic reconnection above the active region produced bidirectional plasma ejections and type III bursts with bidirectional frequency drifts; the gradually decreasing starting frequency of these bursts may indicate an upward-moving reconnection site. The resulting magnetic reconfiguration disrupted electron trapping and suppressed the storm, whereas post-flare magnetic recovery allowed the emission to resume. These results show that flares can modulate type I noise storms through magnetic restructuring and provide insight into the generation mechanism of noise storms.

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由太阳耀斑调制的I型太阳射电暴

I型太阳射电暴（噪声风暴）是活跃区域上方持续的米波非热辐射，其发生和性质与局地磁组态和非热电子加速密切相关。本文研究了2023年12月24日的一次I型噪声风暴及其与耀斑活动的关系。噪声风暴源与有源区（AR） 3529共空，具有频率相关的空间色散。伴随的M2.9耀斑强烈地调制了辐射，风暴强度在耀斑开始时减弱，之后恢复，并转移到更高的频率。基于多波长观测，我们认为耀斑前的小规模重联为上覆的封闭磁结构提供了非热电子并维持了风暴。在耀斑期间，活动区域上方的磁重联产生了双向等离子体抛射和双向频率漂移的III型爆发；这些爆发的开始频率逐渐降低，可能表明一个向上移动的重连点。由此产生的磁重构破坏了电子捕获并抑制了风暴，而耀斑后的磁恢复使发射恢复。这些结果表明，耀斑可以通过磁重构调制I型噪声风暴，并对噪声风暴的产生机制提供了新的认识。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Solar Physics 地学天文-天文与天体物理

CiteScore

5.10

自引率

17.90%

发文量

146

审稿时长

1 months

期刊介绍： Solar Physics was founded in 1967 and is the principal journal for the publication of the results of fundamental research on the Sun. The journal treats all aspects of solar physics, ranging from the internal structure of the Sun and its evolution to the outer corona and solar wind in interplanetary space. Papers on solar-terrestrial physics and on stellar research are also published when their results have a direct bearing on our understanding of the Sun.