KMS of Xinjiang Astronomical Observatory, CAS
| Possible origin of AT2021any: A failed gamma-ray burst from a structured jet | |
| Xu, Fan1; Huang, Yong-Feng1,2,3; Geng, Jin-Jun4 | |
| 2023-11-28 | |
| Source Publication | ASTRONOMY & ASTROPHYSICS
 |
| ISSN | 0004-6361 |
| Volume | 679Pages:A103 |
| Contribution Rank | 3 |
| Abstract | Afterglows not associated with any gamma-ray bursts (GRBs) are called orphan afterglows. The detection of such afterglows is an important goal in many sky survey programs. Recently, a promising orphan afterglow candidate, AT2021any, was found by the Zwicky Transient Facility. In this work, we performed multi-wavelength fittings of AT2021any with two different outflow models, namely, the top-hat jet model and the structured Gaussian jet model. Although both models can fit the observed light curves well, we found that the structured Gaussian jet model presents a better result and is thus preferred by observations. In this framework, the best-fit Lorentz factor is about 68, which indicates that AT2021any should be a failed GRB. The half-opening angle of the jet and the viewing angle were found to be 0.1 and 0.02, respectively, which means that the jet is essentially observed on-axis. We inferred the trigger time of the GRB to be about 1000 s before the first detection of the orphan afterglow, and we derived an upper limit of 21.5% for the radiative efficiency, which is typical for GRBs. |
| Keyword | gamma-ray burst: general gamma-ray burst: individual: AT2021any methods: numerical radiation mechanisms: non-thermal |
| DOI | 10.1051/0004-6361/202346674 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | FAST OPTICAL TRANSIENTS ; FOLLOW-UP OBSERVATIONS ; LIGHT CURVES ; RELATIVISTIC JET ; ALL-SKY ; AFTERGLOWS ; EMISSION ; SEARCH ; RADIO ; CONSTRAINTS |
| Funding Project | National Key R&D Program of China ; National SKA Program of China[2020SKA0120300] ; National Natural Science Foundation of China[12233002] ; National Natural Science Foundation of China[12041306] ; National Natural Science Foundation of China[12273113] ; National Natural Science Foundation of China[12321003] ; Youth Innovations and Talents Project of Shandong Provincial Colleges and Universities[201909118] ; Youth Innovation Promotion Association[2023331] ; [2021YFA0718500] |
| WOS Research Area | Astronomy & Astrophysics |
| WOS Subject | Astronomy & Astrophysics |
| WOS ID | WOS:001110288900008 |
| Publisher | EDP SCIENCES S A |
| Funding Organization | National Key R&D Program of China ; National SKA Program of China ; National Natural Science Foundation of China ; Youth Innovations and Talents Project of Shandong Provincial Colleges and Universities ; Youth Innovation Promotion Association |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/5728 |
| Collection | 中国科学院新疆天文台 |
| Corresponding Author | Xu, Fan; Huang, Yong-Feng |
| Affiliation | 1.Nanjing Univ, Sch Astron & Space Sci, Nanjing 210023, Peoples R China 2.Nanjing Univ, Minist Educ, Key Lab Modern Astron & Astrophys, Nanjing 210023, Peoples R China 3.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China 4.Chinese Acad Sci, Purple Mt Observ, Nanjing 210023, Peoples R China |
| Corresponding Author Affilication | Xinjiang Astronomical Observatory, Chinese Academy of Sciences |
| Recommended Citation GB/T 7714 | Xu, Fan,Huang, Yong-Feng,Geng, Jin-Jun. Possible origin of AT2021any: A failed gamma-ray burst from a structured jet[J]. ASTRONOMY & ASTROPHYSICS,2023,679:A103. |
| APA | Xu, Fan,Huang, Yong-Feng,&Geng, Jin-Jun.(2023).Possible origin of AT2021any: A failed gamma-ray burst from a structured jet.ASTRONOMY & ASTROPHYSICS,679,A103. |
| MLA | Xu, Fan,et al."Possible origin of AT2021any: A failed gamma-ray burst from a structured jet".ASTRONOMY & ASTROPHYSICS 679(2023):A103. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| Xu-2023-Possible ori（1034KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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