Evidence of Minijet Emission in a Large Emission Zone from a Magnetically Dominated Gamma-Ray Burst Jet
The second brightest gamma-ray burst (GRB) in history, GRB 230307A, provides an ideal laboratory to study the mechanism of GRB prompt emission thanks to its extraordinarily high photon statistics and its single-episode activity. Here we demonstrate that the rapidly variable components of its prompt...
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| author | S.-X. Yi C.-W. Wang X. Shao R. Moradi H. Gao B. Zhang S.-L. Xiong S.-N. Zhang W.-J. Tan J.-C. Liu W.-C. Xue Y.-Q. Zhang C. Zheng Y. Wang P. Zhang Z.-H. An C. Cai P.-Y. Feng K. Gong D.-Y. Guo Y. Huang B. Li X.-B. Li X.-Q. Li X.-J. Liu Y.-Q. Liu X. Ma W.-X. Peng R. Qiao L.-M. Song J. Wang P. Wang Y. Wang X.-Y. Wen S. Xiao Y.-B. Xu S. Yang Q.-B. Yi D.-L. Zhang F. Zhang H.-M. Zhang J.-P. Zhang Z. Zhang X.-Y. Zhao Y. Zhao S.-J. Zheng |
| author_facet | S.-X. Yi C.-W. Wang X. Shao R. Moradi H. Gao B. Zhang S.-L. Xiong S.-N. Zhang W.-J. Tan J.-C. Liu W.-C. Xue Y.-Q. Zhang C. Zheng Y. Wang P. Zhang Z.-H. An C. Cai P.-Y. Feng K. Gong D.-Y. Guo Y. Huang B. Li X.-B. Li X.-Q. Li X.-J. Liu Y.-Q. Liu X. Ma W.-X. Peng R. Qiao L.-M. Song J. Wang P. Wang Y. Wang X.-Y. Wen S. Xiao Y.-B. Xu S. Yang Q.-B. Yi D.-L. Zhang F. Zhang H.-M. Zhang J.-P. Zhang Z. Zhang X.-Y. Zhao Y. Zhao S.-J. Zheng |
| author_sort | S.-X. Yi |
| collection | DOAJ |
| description | The second brightest gamma-ray burst (GRB) in history, GRB 230307A, provides an ideal laboratory to study the mechanism of GRB prompt emission thanks to its extraordinarily high photon statistics and its single-episode activity. Here we demonstrate that the rapidly variable components of its prompt emission compose an overall broad single pulse-like profile. Although these individual rapid components are aligned in time across all energy bands, this overall profile conspires to show a well-defined energy-dependent behavior that is typically seen in single GRB pulses. Such a feature demonstrates that the prompt emission of this burst is from many individual emitting units that are casually linked in a emission site at a large distance from the central engine. Such a scenario is in natural consistency with the internal-collision-induced magnetic reconnection and turbulence framework, which invokes many minijets due to local magnetic reconnection that constantly appear and disappear in a global magnetically dominated jet. |
| format | Article |
| id | doaj-art-e14a347c73534c5f85fa275555e04569 |
| institution | DOAJ |
| issn | 1538-4357 |
| language | English |
| publishDate | 2025-01-01 |
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| spelling | doaj-art-e14a347c73534c5f85fa275555e045692025-08-20T03:05:53ZengIOP PublishingThe Astrophysical Journal1538-43572025-01-01985223910.3847/1538-4357/adcf98Evidence of Minijet Emission in a Large Emission Zone from a Magnetically Dominated Gamma-Ray Burst JetS.-X. Yi0https://orcid.org/0000-0001-7599-0174C.-W. Wang1https://orcid.org/0009-0008-8053-2985X. Shao2R. Moradi3H. Gao4https://orcid.org/0000-0002-3100-6558B. Zhang5https://orcid.org/0000-0002-9725-2524S.-L. Xiong6https://orcid.org/0000-0002-4771-7653S.-N. Zhang7https://orcid.org/0000-0001-5586-1017W.-J. Tan8J.-C. Liu9W.-C. Xue10https://orcid.org/0000-0001-8664-5085Y.-Q. Zhang11https://orcid.org/0009-0001-7226-2355C. Zheng12Y. Wang13https://orcid.org/0009-0008-5068-3504P. Zhang14https://orcid.org/0000-0002-8097-3616Z.-H. An15C. Cai16https://orcid.org/0000-0002-6540-2372P.-Y. Feng17K. Gong18D.-Y. Guo19Y. Huang20B. Li21https://orcid.org/0000-0002-0238-834XX.-B. Li22https://orcid.org/0000-0003-4585-589XX.-Q. Li23https://orcid.org/0000-0003-3466-9493X.-J. Liu24Y.-Q. Liu25X. Ma26https://orcid.org/0000-0002-2032-2440W.-X. Peng27R. Qiao28L.-M. Song29https://orcid.org/0000-0003-0274-3396J. Wang30P. Wang31https://orcid.org/0000-0003-0466-2223Y. Wang32X.-Y. Wen33S. Xiao34Y.-B. Xu35S. Yang36Q.-B. Yi37D.-L. Zhang38F. Zhang39H.-M. Zhang40J.-P. Zhang41Z. Zhang42https://orcid.org/0000-0003-4673-773XX.-Y. Zhao43Y. Zhao44https://orcid.org/0000-0002-4636-0293S.-J. Zheng45Key Laboratory of Particle Astrophysics, Institute of High Energy Physics , Chinese Academy of Sciences, Beijing 100049, People’s Republic of China ; sxyi@ihep.ac.cn, cwwang@ihep.ac.cn, xiongsl@ihep.ac.cnKey Laboratory of Particle Astrophysics, Institute of High Energy Physics , Chinese Academy of Sciences, Beijing 100049, People’s Republic of China ; sxyi@ihep.ac.cn, cwwang@ihep.ac.cn, xiongsl@ihep.ac.cn; University of Chinese Academy of Sciences , Chinese Academy of Sciences, Beijing 100049, People’s Republic of ChinaDepartment of Astronomy, Beijing Normal University , Beijing 100875, People’s Republic of China ; gaohe@bnu.edu.cnKey Laboratory of Particle Astrophysics, Institute of High Energy Physics , Chinese Academy of Sciences, Beijing 100049, People’s Republic of China ; sxyi@ihep.ac.cn, cwwang@ihep.ac.cn, xiongsl@ihep.ac.cnDepartment of Astronomy, Beijing Normal University , Beijing 100875, People’s Republic of China ; gaohe@bnu.edu.cnNevada Center for Astrophysics, University of Nevada Las Vegas , NV 89154, USA; Department of Physics and Astronomy, University of Nevada Las Vegas , NV 89154, USAKey Laboratory of Particle Astrophysics, Institute of High Energy Physics , Chinese Academy of Sciences, Beijing 100049, People’s Republic of China ; sxyi@ihep.ac.cn, cwwang@ihep.ac.cn, xiongsl@ihep.ac.cnKey Laboratory of Particle Astrophysics, Institute of High Energy Physics , Chinese Academy of Sciences, Beijing 100049, People’s Republic of China ; sxyi@ihep.ac.cn, cwwang@ihep.ac.cn, xiongsl@ihep.ac.cn; University of Chinese Academy of Sciences , Chinese Academy of Sciences, Beijing 100049, People’s Republic of ChinaKey Laboratory of Particle Astrophysics, Institute of High Energy Physics , Chinese Academy of Sciences, Beijing 100049, People’s Republic of China ; sxyi@ihep.ac.cn, cwwang@ihep.ac.cn, xiongsl@ihep.ac.cn; University of Chinese Academy of Sciences , Chinese Academy of Sciences, Beijing 100049, People’s Republic of ChinaKey Laboratory of Particle Astrophysics, Institute of High Energy Physics , Chinese Academy of Sciences, Beijing 100049, People’s Republic of China ; sxyi@ihep.ac.cn, cwwang@ihep.ac.cn, xiongsl@ihep.ac.cn; University of Chinese Academy of Sciences , Chinese Academy of Sciences, Beijing 100049, People’s Republic of ChinaKey Laboratory of Particle Astrophysics, Institute of High Energy Physics , Chinese Academy of Sciences, Beijing 100049, People’s Republic of China ; sxyi@ihep.ac.cn, cwwang@ihep.ac.cn, xiongsl@ihep.ac.cn; University of Chinese Academy of Sciences , Chinese Academy of Sciences, Beijing 100049, People’s Republic of ChinaKey Laboratory of Particle Astrophysics, Institute of High Energy Physics , Chinese Academy of Sciences, Beijing 100049, People’s Republic of China ; sxyi@ihep.ac.cn, cwwang@ihep.ac.cn, xiongsl@ihep.ac.cn; University of Chinese Academy of Sciences , Chinese Academy of Sciences, Beijing 100049, People’s Republic of ChinaKey Laboratory of Particle Astrophysics, Institute of High Energy Physics , Chinese Academy of Sciences, Beijing 100049, People’s Republic of China ; sxyi@ihep.ac.cn, cwwang@ihep.ac.cn, xiongsl@ihep.ac.cn; University of Chinese Academy of Sciences , Chinese Academy of Sciences, Beijing 100049, People’s Republic of ChinaICRANet , Piazza della Repubblica 10, I-65122 Pescara, Italy; ICRA, Dipartamento di Fisica, Sapienza Università di Roma , Piazzale Aldo Moro 5, I-00185 Rome, Italy; INAF , Osservatorio Astronomico d’Abruzzo, Via M. Maggini snc, I-64100 Teramo, ItalyKey Laboratory of Particle Astrophysics, Institute of High Energy Physics , Chinese Academy of Sciences, Beijing 100049, People’s Republic of China ; sxyi@ihep.ac.cn, cwwang@ihep.ac.cn, xiongsl@ihep.ac.cn; College of Electronic and Information Engineering, Tongji University , Shanghai 201804, People’s Republic of ChinaKey Laboratory of Particle Astrophysics, Institute of High Energy Physics , Chinese Academy of Sciences, Beijing 100049, People’s Republic of China ; sxyi@ihep.ac.cn, cwwang@ihep.ac.cn, xiongsl@ihep.ac.cnCollege of Physics and Hebei Key Laboratory of Photophysics Research and Application, Hebei Normal University , Shijiazhuang, Hebei 050024, People’s Republic of ChinaKey Laboratory of Particle Astrophysics, Institute of High Energy Physics , Chinese Academy of Sciences, Beijing 100049, People’s Republic of China ; sxyi@ihep.ac.cn, cwwang@ihep.ac.cn, xiongsl@ihep.ac.cn; University of Chinese Academy of Sciences , Chinese Academy of Sciences, Beijing 100049, People’s Republic of ChinaKey Laboratory of Particle Astrophysics, Institute of High Energy Physics , Chinese Academy of Sciences, Beijing 100049, People’s Republic of China ; sxyi@ihep.ac.cn, cwwang@ihep.ac.cn, xiongsl@ihep.ac.cnKey Laboratory of Particle Astrophysics, Institute of High Energy Physics , Chinese Academy of Sciences, Beijing 100049, People’s Republic of China ; sxyi@ihep.ac.cn, cwwang@ihep.ac.cn, xiongsl@ihep.ac.cnKey Laboratory of Particle Astrophysics, Institute of High Energy Physics , Chinese Academy of Sciences, Beijing 100049, People’s Republic of China ; sxyi@ihep.ac.cn, cwwang@ihep.ac.cn, xiongsl@ihep.ac.cnKey Laboratory of Particle Astrophysics, Institute of High Energy Physics , Chinese Academy of Sciences, Beijing 100049, People’s Republic of China ; sxyi@ihep.ac.cn, cwwang@ihep.ac.cn, xiongsl@ihep.ac.cnKey Laboratory of Particle Astrophysics, Institute of High Energy Physics , Chinese Academy of Sciences, Beijing 100049, People’s Republic of China ; sxyi@ihep.ac.cn, cwwang@ihep.ac.cn, xiongsl@ihep.ac.cnKey Laboratory of Particle Astrophysics, Institute of High Energy Physics , Chinese Academy of Sciences, Beijing 100049, People’s Republic of China ; sxyi@ihep.ac.cn, cwwang@ihep.ac.cn, xiongsl@ihep.ac.cnKey Laboratory of Particle Astrophysics, Institute of High Energy Physics , Chinese Academy of Sciences, Beijing 100049, People’s Republic of China ; sxyi@ihep.ac.cn, cwwang@ihep.ac.cn, xiongsl@ihep.ac.cnKey Laboratory of Particle Astrophysics, Institute of High Energy Physics , Chinese Academy of Sciences, Beijing 100049, People’s Republic of China ; sxyi@ihep.ac.cn, cwwang@ihep.ac.cn, xiongsl@ihep.ac.cnKey Laboratory of Particle Astrophysics, Institute of High Energy Physics , Chinese Academy of Sciences, Beijing 100049, People’s Republic of China ; sxyi@ihep.ac.cn, cwwang@ihep.ac.cn, xiongsl@ihep.ac.cnKey Laboratory of Particle Astrophysics, Institute of High Energy Physics , Chinese Academy of Sciences, Beijing 100049, People’s Republic of China ; sxyi@ihep.ac.cn, cwwang@ihep.ac.cn, xiongsl@ihep.ac.cnKey Laboratory of Particle Astrophysics, Institute of High Energy Physics , Chinese Academy of Sciences, Beijing 100049, People’s Republic of China ; sxyi@ihep.ac.cn, cwwang@ihep.ac.cn, xiongsl@ihep.ac.cnKey Laboratory of Particle Astrophysics, Institute of High Energy Physics , Chinese Academy of Sciences, Beijing 100049, People’s Republic of China ; sxyi@ihep.ac.cn, cwwang@ihep.ac.cn, xiongsl@ihep.ac.cnKey Laboratory of Particle Astrophysics, Institute of High Energy Physics , Chinese Academy of Sciences, Beijing 100049, People’s Republic of China ; sxyi@ihep.ac.cn, cwwang@ihep.ac.cn, xiongsl@ihep.ac.cnKey Laboratory of Particle Astrophysics, Institute of High Energy Physics , Chinese Academy of Sciences, Beijing 100049, People’s Republic of China ; sxyi@ihep.ac.cn, cwwang@ihep.ac.cn, xiongsl@ihep.ac.cnKey Laboratory of Particle Astrophysics, Institute of High Energy Physics , Chinese Academy of Sciences, Beijing 100049, People’s Republic of China ; sxyi@ihep.ac.cn, cwwang@ihep.ac.cn, xiongsl@ihep.ac.cn; University of Chinese Academy of Sciences , Chinese Academy of Sciences, Beijing 100049, People’s Republic of ChinaKey Laboratory of Particle Astrophysics, Institute of High Energy Physics , Chinese Academy of Sciences, Beijing 100049, People’s Republic of China ; sxyi@ihep.ac.cn, cwwang@ihep.ac.cn, xiongsl@ihep.ac.cnGuizhou Provincial Key Laboratory of Radio Astronomy and Data Processing, Guizhou Normal University , Guiyang 550001, People’s Republic of ChinaKey Laboratory of Particle Astrophysics, Institute of High Energy Physics , Chinese Academy of Sciences, Beijing 100049, People’s Republic of China ; sxyi@ihep.ac.cn, cwwang@ihep.ac.cn, xiongsl@ihep.ac.cnKey Laboratory of Particle Astrophysics, Institute of High Energy Physics , Chinese Academy of Sciences, Beijing 100049, People’s Republic of China ; sxyi@ihep.ac.cn, cwwang@ihep.ac.cn, xiongsl@ihep.ac.cnKey Laboratory of Particle Astrophysics, Institute of High Energy Physics , Chinese Academy of Sciences, Beijing 100049, People’s Republic of China ; sxyi@ihep.ac.cn, cwwang@ihep.ac.cn, xiongsl@ihep.ac.cn; School of Physics and Optoelectronics, Xiangtan University , Yuhu District, Xiangtan, Hunan, 411105, People’s Republic of ChinaKey Laboratory of Particle Astrophysics, Institute of High Energy Physics , Chinese Academy of Sciences, Beijing 100049, People’s Republic of China ; sxyi@ihep.ac.cn, cwwang@ihep.ac.cn, xiongsl@ihep.ac.cnKey Laboratory of Particle Astrophysics, Institute of High Energy Physics , Chinese Academy of Sciences, Beijing 100049, People’s Republic of China ; sxyi@ihep.ac.cn, cwwang@ihep.ac.cn, xiongsl@ihep.ac.cnKey Laboratory of Particle Astrophysics, Institute of High Energy Physics , Chinese Academy of Sciences, Beijing 100049, People’s Republic of China ; sxyi@ihep.ac.cn, cwwang@ihep.ac.cn, xiongsl@ihep.ac.cnKey Laboratory of Particle Astrophysics, Institute of High Energy Physics , Chinese Academy of Sciences, Beijing 100049, People’s Republic of China ; sxyi@ihep.ac.cn, cwwang@ihep.ac.cn, xiongsl@ihep.ac.cn; University of Chinese Academy of Sciences , Chinese Academy of Sciences, Beijing 100049, People’s Republic of ChinaKey Laboratory of Particle Astrophysics, Institute of High Energy Physics , Chinese Academy of Sciences, Beijing 100049, People’s Republic of China ; sxyi@ihep.ac.cn, cwwang@ihep.ac.cn, xiongsl@ihep.ac.cnKey Laboratory of Particle Astrophysics, Institute of High Energy Physics , Chinese Academy of Sciences, Beijing 100049, People’s Republic of China ; sxyi@ihep.ac.cn, cwwang@ihep.ac.cn, xiongsl@ihep.ac.cnKey Laboratory of Particle Astrophysics, Institute of High Energy Physics , Chinese Academy of Sciences, Beijing 100049, People’s Republic of China ; sxyi@ihep.ac.cn, cwwang@ihep.ac.cn, xiongsl@ihep.ac.cn; School of Computer and Information, Dezhou University , Dezhou 253023, People’s Republic of ChinaKey Laboratory of Particle Astrophysics, Institute of High Energy Physics , Chinese Academy of Sciences, Beijing 100049, People’s Republic of China ; sxyi@ihep.ac.cn, cwwang@ihep.ac.cn, xiongsl@ihep.ac.cnThe second brightest gamma-ray burst (GRB) in history, GRB 230307A, provides an ideal laboratory to study the mechanism of GRB prompt emission thanks to its extraordinarily high photon statistics and its single-episode activity. Here we demonstrate that the rapidly variable components of its prompt emission compose an overall broad single pulse-like profile. Although these individual rapid components are aligned in time across all energy bands, this overall profile conspires to show a well-defined energy-dependent behavior that is typically seen in single GRB pulses. Such a feature demonstrates that the prompt emission of this burst is from many individual emitting units that are casually linked in a emission site at a large distance from the central engine. Such a scenario is in natural consistency with the internal-collision-induced magnetic reconnection and turbulence framework, which invokes many minijets due to local magnetic reconnection that constantly appear and disappear in a global magnetically dominated jet.https://doi.org/10.3847/1538-4357/adcf98Gamma-ray burstersGamma-ray transient sources |
| spellingShingle | S.-X. Yi C.-W. Wang X. Shao R. Moradi H. Gao B. Zhang S.-L. Xiong S.-N. Zhang W.-J. Tan J.-C. Liu W.-C. Xue Y.-Q. Zhang C. Zheng Y. Wang P. Zhang Z.-H. An C. Cai P.-Y. Feng K. Gong D.-Y. Guo Y. Huang B. Li X.-B. Li X.-Q. Li X.-J. Liu Y.-Q. Liu X. Ma W.-X. Peng R. Qiao L.-M. Song J. Wang P. Wang Y. Wang X.-Y. Wen S. Xiao Y.-B. Xu S. Yang Q.-B. Yi D.-L. Zhang F. Zhang H.-M. Zhang J.-P. Zhang Z. Zhang X.-Y. Zhao Y. Zhao S.-J. Zheng Evidence of Minijet Emission in a Large Emission Zone from a Magnetically Dominated Gamma-Ray Burst Jet The Astrophysical Journal Gamma-ray bursters Gamma-ray transient sources |
| title | Evidence of Minijet Emission in a Large Emission Zone from a Magnetically Dominated Gamma-Ray Burst Jet |
| title_full | Evidence of Minijet Emission in a Large Emission Zone from a Magnetically Dominated Gamma-Ray Burst Jet |
| title_fullStr | Evidence of Minijet Emission in a Large Emission Zone from a Magnetically Dominated Gamma-Ray Burst Jet |
| title_full_unstemmed | Evidence of Minijet Emission in a Large Emission Zone from a Magnetically Dominated Gamma-Ray Burst Jet |
| title_short | Evidence of Minijet Emission in a Large Emission Zone from a Magnetically Dominated Gamma-Ray Burst Jet |
| title_sort | evidence of minijet emission in a large emission zone from a magnetically dominated gamma ray burst jet |
| topic | Gamma-ray bursters Gamma-ray transient sources |
| url | https://doi.org/10.3847/1538-4357/adcf98 |
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