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| Main Authors: | , , , , , , |
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| Format: | Preprint |
| Published: |
2026
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2605.26553 |
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| _version_ | 1866913162578624512 |
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| author | Wei, Jia-Peng Deng, Chen Giacinti, Gwenael Zou, Ze-Cheng Hu, Chen-Ran Huang, Yong-Feng Geng, Jin-Jun |
| author_facet | Wei, Jia-Peng Deng, Chen Giacinti, Gwenael Zou, Ze-Cheng Hu, Chen-Ran Huang, Yong-Feng Geng, Jin-Jun |
| contents | FRB 190520B is a repeating fast radio burst source whose large dispersion measure (DM) and temporal broadening suggest a dense and evolving local environment. In this work, we test the possibility that FRB 190520B originates from the core-collapse of a massive star so that its central engine is embedded in a supernova remnant (SNR) expanding into a wind environment, whose evolution is described by the self-similar solution. We use the observed DM and scattering timescale of FRB 190520B to constrain the physical parameters of its surrounding SNR and host-galaxy DM. Twenty typical cases are considered, arising from four ejecta profiles and five scattering prescriptions. It is found that only 6 cases are retained and provide acceptable fits. All retained cases have a shallow ejecta profile and a young source age of $t_0=79.8$--$169.8~{\rm yr}$. The ejecta mass is inferred to be large for all six cases, while the kinetic energy and mass-loss rate span a wide range. The secular DM evolution is reproduced better than the detailed scattering evolution. The up-drift behavior of the scattering residual suggests an additional component or more complicated structures inside the SNR. All retained cases are self-consistent within the adopted scattering theory and the circum-burst medium becomes transparent for GHz bursts before the inferred source ages. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_26553 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Constraining the Supernova Remnant Environment of FRB 190520B with Dispersion Measure and Scattering Timescale Wei, Jia-Peng Deng, Chen Giacinti, Gwenael Zou, Ze-Cheng Hu, Chen-Ran Huang, Yong-Feng Geng, Jin-Jun High Energy Astrophysical Phenomena FRB 190520B is a repeating fast radio burst source whose large dispersion measure (DM) and temporal broadening suggest a dense and evolving local environment. In this work, we test the possibility that FRB 190520B originates from the core-collapse of a massive star so that its central engine is embedded in a supernova remnant (SNR) expanding into a wind environment, whose evolution is described by the self-similar solution. We use the observed DM and scattering timescale of FRB 190520B to constrain the physical parameters of its surrounding SNR and host-galaxy DM. Twenty typical cases are considered, arising from four ejecta profiles and five scattering prescriptions. It is found that only 6 cases are retained and provide acceptable fits. All retained cases have a shallow ejecta profile and a young source age of $t_0=79.8$--$169.8~{\rm yr}$. The ejecta mass is inferred to be large for all six cases, while the kinetic energy and mass-loss rate span a wide range. The secular DM evolution is reproduced better than the detailed scattering evolution. The up-drift behavior of the scattering residual suggests an additional component or more complicated structures inside the SNR. All retained cases are self-consistent within the adopted scattering theory and the circum-burst medium becomes transparent for GHz bursts before the inferred source ages. |
| title | Constraining the Supernova Remnant Environment of FRB 190520B with Dispersion Measure and Scattering Timescale |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2605.26553 |