Two-component jet model for the afterglow emission of GRB 201216C and GRB 221009A and implications for jet structure of very-high-energy gamma-ray bursts

被引：0

作者：

Sato, Yuri ^{[1
]}

Murase, Kohta ^{[2
,3
,4
,5
]}

Ohira, Yutaka ^{[6
]}

Inoue, Susumu ^{[7
]}

Yamazaki, Ryo ^{[8
,9
]}

机构：

[1] Tohoku Univ, Astron Inst, Grad Sch Sci, Sendai 9808578, Japan

[2] Penn State Univ, Dept Phys, University Pk, PA 16802 USA

[3] Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA

[4] Penn State Univ, Inst Gravitat & Cosmos, Ctr Multimessenger Astrophys, University Pk, PA 16802 USA

[5] Yukawa Inst Theoret Phys, Ctr Gravitat Phys, Kyoto, Kyoto 6068502, Japan

[6] Univ Tokyo, Dept Earth & Planetary Sci, 7-3-1 Hongo,Bunkyo Ku, Tokyo 1130033, Japan

[7] Chiba Univ, Int Ctr Hadron Astrophys, 1-33 Yayoi Cho,Inage Ku, Chiba, Chiba 2638522, Japan

[8] Aoyama Gakuin Univ, Dept Phys Sci, 5-10-1 Fuchinobe, Sagamihara, Kanagawa 2525258, Japan

[9] Osaka Univ, Inst Laser Engn, 2-6 Yamadaoka, Osaka 5650871, Japan

来源：

JOURNAL OF HIGH ENERGY ASTROPHYSICS | 2025年 / 48卷

关键词：

Gamma-ray bursts; Very-high-energy gamma-rays; SYNCHROTRON SELF-COMPTON; LIGHT CURVES; SIMULATIONS; SPECTRA; HYDRODYNAMICS; EFFICIENCY; EVOLUTION; DISCOVERY; PROSPECTS; SCIENCE;

D O I：

10.1016/j.jheap.2025.100415

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In recent years, afterglow emission in the very-high-energy (VHE) band above 100 GeV has been clearly detected for at least five gamma-ray bursts (GRBs 180720B, 190114C, 190829A, 201216C and 221009A). For some of these VHE GRBs, we previously proposed a two-component jet model, consisting of two uniform jets with narrow and wide opening angles to explain their multiwavelength afterglows including VHE gamma rays. In this paper, we show that the VHE spectra and light curves of GRBs 201216C and 221009A can also be reasonably explained by our two-component jet model, based on two top-hat jets propagating into a constant-density circumburst medium. We find that for the five VHE GRBs, the collimation-corrected kinetic energies of the narrow and wide jets have typical values of 5 x 1049 erg and 5 x 1050 erg, respectively. We discuss the similarities and differences among the VHE GRBs, and the implications for the structure of their jets. In agreement with previous studies, the narrow jet of GRB 221009A has an atypically small opening angle, so that its intrinsic, collimation-corrected energy remains within a plausible range despite the unusually large isotropic-equivalent energy.

引用

页数：10

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