Identifying the Origin of FRB-associated X-ray Bursts with X-ray Polarization
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866916422917029888 |
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| author | Zhong, Shu-Qing Li, Long Zhang, Biao Dai, Zi-Gao |
| author_facet | Zhong, Shu-Qing Li, Long Zhang, Biao Dai, Zi-Gao |
| contents | The origin of extraordinary X-ray burst (XRB) associated with a fast radio burst (FRB) like FRB 20200428D is still unclear, though several models such as the emission of a trapped fireball modified by resonant cyclotron scattering, the outflow from a polar trapped-expanding fireball, and the synchrotron radiation of a far-away relativistic shock, have been proposed. To determine which model is true, we study possible X-ray polarization signature for each model, inspired by the importance of radio polarization in identifying FRB origin. We first numerically simulate or calculate the XRB spectrum for each model and fit it to the observed data, then compute the corresponding polarization signal based on the fit. We find that these three models predict different polarization patterns in terms of phase/time and energy variations. The differences can be used to test the models with future X-ray polarization observations. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2410_03167 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Identifying the Origin of FRB-associated X-ray Bursts with X-ray Polarization Zhong, Shu-Qing Li, Long Zhang, Biao Dai, Zi-Gao High Energy Astrophysical Phenomena The origin of extraordinary X-ray burst (XRB) associated with a fast radio burst (FRB) like FRB 20200428D is still unclear, though several models such as the emission of a trapped fireball modified by resonant cyclotron scattering, the outflow from a polar trapped-expanding fireball, and the synchrotron radiation of a far-away relativistic shock, have been proposed. To determine which model is true, we study possible X-ray polarization signature for each model, inspired by the importance of radio polarization in identifying FRB origin. We first numerically simulate or calculate the XRB spectrum for each model and fit it to the observed data, then compute the corresponding polarization signal based on the fit. We find that these three models predict different polarization patterns in terms of phase/time and energy variations. The differences can be used to test the models with future X-ray polarization observations. |
| title | Identifying the Origin of FRB-associated X-ray Bursts with X-ray Polarization |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2410.03167 |