Clues to the photosphere emission origin of gamma-ray burst polarization
文献类型：期刊论文
| 作者 | Meng, Yan-Zhi2; Zhong, Shu-Qing2; Gu, Jia-Hong2; Li, Xin-Fei2; Zhao XZ(赵小舟)1 |
| 刊名 | ASTRONOMY & ASTROPHYSICS
 |
| 出版日期 | 2026-02-05 |
| 卷号 | 706 |
| 关键词 | polarization radiation mechanisms: thermal |
| ISSN号 | 0004-6361 |
| DOI | 10.1051/0004-6361/202556311 |
| 产权排序 | 第2完成单位 |
| 文献子类 | Article |
| 英文摘要 | Context. Despite more than half a century of research, the dominant radiation mechanism of gamma-ray burst (GRB) prompt emission remains unsolved. Some progress has been made through the analyses of the observational spectra of Swift/BAT, Konus/Wind, and Fermi/GBM, as well as the spectra of the photosphere or synchrotron models, but it is still insufficient to pin down the answer. Aims. Combining the spectral and polarization observations, we seek new criteria for model evaluation. Methods. We thoughtfully investigated the polarization samples of POLAR and AstroSAT, combining the light curve, spectral, and polarization parameters. Results. The power-law shape of the X-ray afterglows, the T-90 proportional to (L-iso)(-0.5) correlation, and the hard low-energy spectral index alpha are revealed, thus supporting the photosphere origin. Furthermore, we discovered the positive correlation of alpha and the polarization degree (PD), which can be consistently explained by the photosphere polarization scenario involving the jet asymmetry from a moderate viewing angle of theta(v) = 0.015. |
| 学科主题 | 物理学 ; 高能物理学 ; 天文学 ; 天体物理学 ; 高能天体物理学 |
| URL标识 | 查看原文 |
| 出版地 | 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE |
| WOS关键词 | INDUCED MAGNETIC RECONNECTION ; PROMPT EMISSION ; BLACK-HOLE ; TEMPORAL EVOLUTION ; GRB POLARIZATION ; MODEL ; SPECTRA ; AFTERGLOW ; ANGLE ; JETS |
| 资助项目 | N/A |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001681785100008 |
| 出版者 | EDP SCIENCES S A |
| 资助机构 | [12403045] ; [2025GXNSFBA069091] ; [24Z01] |
| 版本 | 出版稿 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/28916]  |
| 专题 | 云南天文台_太阳物理研究组 |
| 通讯作者 | Meng, Yan-Zhi |
| 作者单位 | 1.Yunnan Observatories, Chinese Academy of Sciences Kunming, People’s Republic of China 2.School of Science, Guangxi University of Science and Technology Liuzhou Guangxi 545006, People’s Republic of China; |
| 推荐引用方式 GB/T 7714 | Meng, Yan-Zhi,Zhong, Shu-Qing,Gu, Jia-Hong,et al. Clues to the photosphere emission origin of gamma-ray burst polarization[J]. ASTRONOMY & ASTROPHYSICS,2026,706. |
| APA | Meng, Yan-Zhi,Zhong, Shu-Qing,Gu, Jia-Hong,Li, Xin-Fei,&赵小舟.(2026).Clues to the photosphere emission origin of gamma-ray burst polarization.ASTRONOMY & ASTROPHYSICS,706. |
| MLA | Meng, Yan-Zhi,et al."Clues to the photosphere emission origin of gamma-ray burst polarization".ASTRONOMY & ASTROPHYSICS 706(2026). |
入库方式： OAI收割
来源：云南天文台
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