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| Autores principales: | , |
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| Formato: | Preprint |
| Publicado: |
2024
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| Materias: | |
| Acceso en línea: | https://arxiv.org/abs/2403.10718 |
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| _version_ | 1866911799143563264 |
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| author | Sui, Li-Qiang Lan, Mi-Xiang |
| author_facet | Sui, Li-Qiang Lan, Mi-Xiang |
| contents | In the former studies, the time evolution information is missed in deducing the time-integrated polarizations of gamma-ray burst (GRB) prompt emission. Here, it is considered and the time-integrated polarizations is investigated through the summation of the time-resolved ones. The statistical properties of the distribution of the time-integrated polarization degree ($Π$) can be read from the $q-Π$ curve, where $q\equivθ_V/θ_j$. $θ_V$ and $θ_j$ are the observational and jet half-opening angles, respectively. Hence, only the $q-Π$ curves are studied. In addition to a toroidal magnetic field in the radiation region, an aligned field is also discussed. We found the predicted time-integrated PD is around $(40-50)\%$ for High-energy Polarimetry Detector (HPD) on board POLAR-2 and is roughly $(30-40)\%$ for its Low-energy Polarimetry Detector (LPD). Therefore, $Π$ value detected by the HPD will be larger than that of the LPD in statistics and the result of the former estimations will underestimate the value of $Π$ in an ordered field. There are mainly two types of the $q-Π$ curve profiles, corresponding to two ordered magnetic field configurations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_10718 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Revisiting the time-integrated polarizations of gamma-ray burst prompt phase Sui, Li-Qiang Lan, Mi-Xiang High Energy Astrophysical Phenomena In the former studies, the time evolution information is missed in deducing the time-integrated polarizations of gamma-ray burst (GRB) prompt emission. Here, it is considered and the time-integrated polarizations is investigated through the summation of the time-resolved ones. The statistical properties of the distribution of the time-integrated polarization degree ($Π$) can be read from the $q-Π$ curve, where $q\equivθ_V/θ_j$. $θ_V$ and $θ_j$ are the observational and jet half-opening angles, respectively. Hence, only the $q-Π$ curves are studied. In addition to a toroidal magnetic field in the radiation region, an aligned field is also discussed. We found the predicted time-integrated PD is around $(40-50)\%$ for High-energy Polarimetry Detector (HPD) on board POLAR-2 and is roughly $(30-40)\%$ for its Low-energy Polarimetry Detector (LPD). Therefore, $Π$ value detected by the HPD will be larger than that of the LPD in statistics and the result of the former estimations will underestimate the value of $Π$ in an ordered field. There are mainly two types of the $q-Π$ curve profiles, corresponding to two ordered magnetic field configurations. |
| title | Revisiting the time-integrated polarizations of gamma-ray burst prompt phase |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2403.10718 |