The BOAT GRB 221009A: A Poynting-flux-dominated narrow jet surrounded by a matter-dominated structured jet wing

被引：23

作者：

Zhang, Bing ^{[1
,2
]}

Wang, Xiang-Yu ^{[1
,3
]}

Zheng, Jian-He ^{[3
]}

机构：

[1] Univ Nevada Las Vegas, Nevada Ctr Astrophys, Las Vegas, NV 89154 USA

[2] Univ Nevada Las Vegas, Dept Phys & Astron, Las Vegas, NV 89154 USA

[3] Nanjing Univ, Sch Astron & Space Sci, Nanjing 210093, Peoples R China

来源：

JOURNAL OF HIGH ENERGY ASTROPHYSICS | 2024年 / 41卷

关键词：

Gamma-ray bursts; Relativistic fluid dynamics; RAY BURST AFTERGLOWS; LIGHT CURVES; REVERSE SHOCK; RELATIVISTIC JETS; INVERSE-COMPTON; LORENTZ FACTOR; VIEWING ANGLE; EMISSION; ENERGY; SPECTRA;

D O I：

10.1016/j.jheap.2024.01.002

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We argue that the broad-band observations of the brightest-of-all-time (BOAT) GRB 221009A reveal a physical picture involving two jet components: a narrow (similar to 0.6 degree half opening angle) pencil-beam jet that has a Poynting-flux-dominated jet composition, and a broader matter-dominated jet with an angular structure. We discuss various observational evidence that supports such a picture. To treat the problem, we develop an analytical structured jet model for both forward and reverse shock emission from the matter dominated structured jet wing during the deceleration phase. We discuss the physical implications of such a two-component jet configuration for this particular burst and for GRBs in general. We argue that in a quasi-universal structured jet scenario, some bright X -ray flares could be similar narrow jets viewed slightly outside the narrow jet cone and that narrow jets may exist in many more GRBs without being detected.

引用

页码：42 / 53

页数：12

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