Solar jet-induced perturbation propagating through coronal loops and in-loop electron beam transport indicated by type II and type N radio bursts
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| Main Authors: | , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866915688587722752 |
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| author | Cui, Yingli Kong, Xiangliang Li, Zhentong Wang, Bing Duan, Yadan Zhong, Ze Ning, Hao Wu, Zhao Wang, Manqing Liu, Yang Yu, Feiyu Jiang, Zelong Chen, Wei Su, Yang Chen, Yao |
| author_facet | Cui, Yingli Kong, Xiangliang Li, Zhentong Wang, Bing Duan, Yadan Zhong, Ze Ning, Hao Wu, Zhao Wang, Manqing Liu, Yang Yu, Feiyu Jiang, Zelong Chen, Wei Su, Yang Chen, Yao |
| contents | Solar type II radio bursts are commonly attributed to coronal shocks driven by coronal mass ejections (CMEs). However, some metric type II bursts have occasionally been reported to occur in the absence of a CME and to be associated with weak solar activities. This study aims to identify the driver of the coronal shock in this kind of type II event. We investigate a high-frequency metric type II burst with clear band splitting, observed simultaneously by the Chashan Broadband Solar radio spectrograph and the Nançay Radioheliograph. It is associated with a C3.1-class flare and a small-scale jet, but without a detectable CME in the coronagraphs. The type II burst is preceded by multiple type III bursts, one of which exhibits characteristics of a type N burst. The type II burst source is associated with the jet-induced perturbation front propagating through nearby closed loops at a speed of $\sim$880 km s$^{-1}$, rather than the much slower jet front. This suggests that the disturbance initiated by the jet can convert to a shock wave within low Alfvénic coronal loops, providing the necessary conditions for electron acceleration and subsequent radio emission. Our findings offer new insights into the formation mechanism of high-frequency type II bursts associated with weak flares and jets. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_18657 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Solar jet-induced perturbation propagating through coronal loops and in-loop electron beam transport indicated by type II and type N radio bursts Cui, Yingli Kong, Xiangliang Li, Zhentong Wang, Bing Duan, Yadan Zhong, Ze Ning, Hao Wu, Zhao Wang, Manqing Liu, Yang Yu, Feiyu Jiang, Zelong Chen, Wei Su, Yang Chen, Yao Solar and Stellar Astrophysics Solar type II radio bursts are commonly attributed to coronal shocks driven by coronal mass ejections (CMEs). However, some metric type II bursts have occasionally been reported to occur in the absence of a CME and to be associated with weak solar activities. This study aims to identify the driver of the coronal shock in this kind of type II event. We investigate a high-frequency metric type II burst with clear band splitting, observed simultaneously by the Chashan Broadband Solar radio spectrograph and the Nançay Radioheliograph. It is associated with a C3.1-class flare and a small-scale jet, but without a detectable CME in the coronagraphs. The type II burst is preceded by multiple type III bursts, one of which exhibits characteristics of a type N burst. The type II burst source is associated with the jet-induced perturbation front propagating through nearby closed loops at a speed of $\sim$880 km s$^{-1}$, rather than the much slower jet front. This suggests that the disturbance initiated by the jet can convert to a shock wave within low Alfvénic coronal loops, providing the necessary conditions for electron acceleration and subsequent radio emission. Our findings offer new insights into the formation mechanism of high-frequency type II bursts associated with weak flares and jets. |
| title | Solar jet-induced perturbation propagating through coronal loops and in-loop electron beam transport indicated by type II and type N radio bursts |
| topic | Solar and Stellar Astrophysics |
| url | https://arxiv.org/abs/2512.18657 |