Coronal Diagnostics Via Modelling Periodic-Beaded Stripes of Solar Radio Bursts
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arXiv
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| Autores principales: | , , , , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2026
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| _version_ | 1866913072999825408 |
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| author | Li, Chuanyang Chen, Yao Wang, Bing Li, Yutong Kong, Xiangliang Ning, Hao Ni, Sulan Chang, Shuwang Li, Zichuan Gao, Yang Cui, Zhe Deng, Li Yan, Jingye Yan, Fabao |
| author_facet | Li, Chuanyang Chen, Yao Wang, Bing Li, Yutong Kong, Xiangliang Ning, Hao Ni, Sulan Chang, Shuwang Li, Zichuan Gao, Yang Cui, Zhe Deng, Li Yan, Jingye Yan, Fabao |
| contents | Using high-resolution data from the Chashan Broadband Solar radio spectrometer at meter wavelengths (CBSm) of the Chinese Meridian Project-Phase II (CMP-II), Li et al. (2025) identified a novel fine spectral structure of solar radio bursts, termed periodic beaded stripes, and proposed a generation mechanism. Here we report additional events and develop a quantitative method to determine the physical conditions in the emission region. Periodic stripes tend to occur in the post-phase of flares and are associated with complex magnetic configurations. They repeat on sub-second timescales and show $\sim$0.1 s bead-like modulations, often accompanied by low-frequency absorptions. Modeling the chained stripes with linear kinetic theory of the double plasma resonance (DPR) instability constrains the source-region magnetic field to 0.2-1.7 G and the plasma density to (1-7) $\times 10^8$ cm $^{-3}$. The former follows the drift of individual stripes, and the latter tracks the overall trend. This study summarizes the key properties of periodic beaded stripes and establishes a quantitative DPR-based framework for coronal diagnostics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_26783 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Coronal Diagnostics Via Modelling Periodic-Beaded Stripes of Solar Radio Bursts Li, Chuanyang Chen, Yao Wang, Bing Li, Yutong Kong, Xiangliang Ning, Hao Ni, Sulan Chang, Shuwang Li, Zichuan Gao, Yang Cui, Zhe Deng, Li Yan, Jingye Yan, Fabao Solar and Stellar Astrophysics Using high-resolution data from the Chashan Broadband Solar radio spectrometer at meter wavelengths (CBSm) of the Chinese Meridian Project-Phase II (CMP-II), Li et al. (2025) identified a novel fine spectral structure of solar radio bursts, termed periodic beaded stripes, and proposed a generation mechanism. Here we report additional events and develop a quantitative method to determine the physical conditions in the emission region. Periodic stripes tend to occur in the post-phase of flares and are associated with complex magnetic configurations. They repeat on sub-second timescales and show $\sim$0.1 s bead-like modulations, often accompanied by low-frequency absorptions. Modeling the chained stripes with linear kinetic theory of the double plasma resonance (DPR) instability constrains the source-region magnetic field to 0.2-1.7 G and the plasma density to (1-7) $\times 10^8$ cm $^{-3}$. The former follows the drift of individual stripes, and the latter tracks the overall trend. This study summarizes the key properties of periodic beaded stripes and establishes a quantitative DPR-based framework for coronal diagnostics. |
| title | Coronal Diagnostics Via Modelling Periodic-Beaded Stripes of Solar Radio Bursts |
| topic | Solar and Stellar Astrophysics |
| url | https://arxiv.org/abs/2604.26783 |