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Polarization Evolution of Gamma-Ray Burst Prompt Emission with Bulk Acceleration

文献类型：期刊论文

作者Zhong, Qian1; Liu, Hong-Bang1; Cheng, Kangfa2; Feng, Zu-Ke1; Tuo, Jiang-Chuan1; Mai, Qian-Nan1; Mao JR(毛基荣)3,4,5; Liang, En-Wei1
刊名ASTROPHYSICAL JOURNAL
出版日期2025-06-10
卷号986期号:1
ISSN号0004-637X
DOI10.3847/1538-4357/add0ac
产权排序第3完成单位
文献子类Article
英文摘要During the prompt phase, Poynting-flux-dominated jets undergo acceleration accompanied by magnetic dissipation. By using an outward-propagating thin-shell model, where bulk Lorentz factors Gamma increase with radius and the magnetic field strength decay is related to the acceleration and the energy conversion rate, this process can be investigated through time-resolved polarization analysis. Faster acceleration produces a greater flux, steeper light-curve growth followed by a sharper decline, and polarization degree decreases sharply. With a fixed acceleration index, lower energy conversion rates are associated with lower flux, shallower rises and declines in light curves, lower polarization degree, smoother decline for on-beam (q = theta(v)/theta(j) < 1) emission, and sharper decline for off-beam (q > 1) emission in polarization curves. Both jet acceleration and magnetic dissipation enhance the likelihood of polarization angle flips in observations with small viewing angles, while also leading to higher polarization degrees after the flip in observations with larger viewing angles. The joint analysis of light curves and polarization provides valuable insights into gamma-ray burst motion and energy conversion processes. Rapid decline in the light curve indicates fast acceleration and high energy conversion rates, while gradual light-curve decline coupled with polarization angle flips (for small viewing angles) or the higher polarization degree after flipping (for large viewing angles) suggests acceleration accompanied by magnetic dissipation. Otherwise, the jet is coasting or slowly accelerating at this time.
学科主题天文学 ; 天体物理学 ; 高能天体物理学 ; 星系与宇宙学
URL标识查看原文
出版地TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
WOS关键词DECAYING MAGNETIC-FIELD ; RECONNECTION ; AFTERGLOWS ; MODELS ; TURBULENCE ; RADIATION ; OUTFLOWS ; I.
资助项目National Key R&D Program of China; National Natural Science Foundation of China[12027803]; National Natural Science Foundation of China[U1731239]; National Natural Science Foundation of China[12133003]; National Natural Science Foundation of China[U1938201]; National Natural Science Foundation of China[12273005]; Guangxi Talent Program (Highland of Innovation Talents);
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001503787100001
出版者IOP Publishing Ltd
资助机构National Key R&D Program of China ; National Natural Science Foundation of China[12027803, U1731239, 12133003, U1938201, 12273005] ; Guangxi Talent Program (Highland of Innovation Talents) ; [2024YFA1611700] ; [2021YFA071850X] ; [2021YFA071840X]
版本出版稿
源URL[http://ir.ynao.ac.cn/handle/114a53/28336]  
专题星系类星体研究组
云南天文台_中国科学院天体结构与演化重点实验室
通讯作者Liu, Hong-Bang
作者单位1.Guangxi Key Laboratory for Relativistic Astrophysics, School of Physical Science and Technology, Guangxi University, Nanning 530004, People's Republic of China; liuhb@gxu.edu.cn;
2.School of Mathematics and Physics, Guangxi Minzu University, Nanning 530006, People's Republic of China;
3.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, Yunnan Province, People's Republic of China;
4.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, People's Republic of China;
5.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, People's Republic of China
推荐引用方式
GB/T 7714		 Zhong, Qian,Liu, Hong-Bang,Cheng, Kangfa,et al. Polarization Evolution of Gamma-Ray Burst Prompt Emission with Bulk Acceleration[J]. ASTROPHYSICAL JOURNAL,2025,986(1).
APA Zhong, Qian.,Liu, Hong-Bang.,Cheng, Kangfa.,Feng, Zu-Ke.,Tuo, Jiang-Chuan.,...&Liang, En-Wei.(2025).Polarization Evolution of Gamma-Ray Burst Prompt Emission with Bulk Acceleration.ASTROPHYSICAL JOURNAL,986(1).
MLA Zhong, Qian,et al."Polarization Evolution of Gamma-Ray Burst Prompt Emission with Bulk Acceleration".ASTROPHYSICAL JOURNAL 986.1(2025).

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来源：云南天文台

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