The Nearby Luminous Transient AT2018cow: A Magnetar Formed in a Subrelativistically Expanding Nonjetted Explosion
文献类型：期刊论文
| 作者 | Mohan, P.2; An, T.2,3; Yang, J.1,2 |
| 刊名 | ASTROPHYSICAL JOURNAL LETTERS
 |
| 出版日期 | 2020-01-10 |
| 卷号 | 888期号:2页码:9 |
| 关键词 | Transient sources High energy astrophysics Very long baseline interferometry Magnetars Burst astrophysics |
| ISSN号 | 2041-8205 |
| DOI | 10.3847/2041-8213/ab64d1 |
| 英文摘要 | The fast-rising blue optical transient AT2018cow indicated unusual early-phase characteristics unlike relatively better studied explosive transients. Its afterglow may be produced by either a relativistically beamed (jetted) or intrinsically luminous (nonjetted) ejecta and carries observational signatures of the progenitor and environment. High-resolution monitoring can distinguish between these scenarios and clarify the progenitor nature. We present very long baseline interferometry (VLBI) observations of AT2018cow at 5 GHz involving 21 radio telescopes from the European VLBI Network with five sessions spanning 1 yr. With an astrometric precision up to 25 mu as per epoch, the rapidly fading compact mas-scale source is found to be nonjetted with a proper motion of <= 0.15 mas yr(-1) (0.14 c). This and a dense (number density 10(4)-10(5) cm(-3)) magnetized environment (magnetic field strength >= 0.84 G) are characteristic of a newly formed magnetar driven central engine, originating in the successful explosion of a low-mass star. |
| WOS关键词 | FAST RADIO-BURSTS ; SUPERNOVA ; DISRUPTION ; AFTERGLOW ; EMISSION ; MOTION |
| 资助项目 | SKA pre-research grant - National Key R&D Programme of China[2018YFA0404603] ; Chinese Academy of Sciences (CAS)[114231KYSB20170003] ; NSFC[11650110438] ; Youth Innovation Promotion Association of CAS ; Gothenburg Centre for Advanced Studies in Science and Technology ; EVN project[RY007] ; EVN project[EY033] ; EVN project[EM137] ; CAS-PIFI[2016PM024] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000520969800001 |
| 出版者 | IOP PUBLISHING LTD |
| 资助机构 | SKA pre-research grant - National Key R&D Programme of China ; SKA pre-research grant - National Key R&D Programme of China ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; NSFC ; NSFC ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; Gothenburg Centre for Advanced Studies in Science and Technology ; Gothenburg Centre for Advanced Studies in Science and Technology ; EVN project ; EVN project ; CAS-PIFI ; CAS-PIFI ; SKA pre-research grant - National Key R&D Programme of China ; SKA pre-research grant - National Key R&D Programme of China ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; NSFC ; NSFC ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; Gothenburg Centre for Advanced Studies in Science and Technology ; Gothenburg Centre for Advanced Studies in Science and Technology ; EVN project ; EVN project ; CAS-PIFI ; CAS-PIFI ; SKA pre-research grant - National Key R&D Programme of China ; SKA pre-research grant - National Key R&D Programme of China ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; NSFC ; NSFC ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; Gothenburg Centre for Advanced Studies in Science and Technology ; Gothenburg Centre for Advanced Studies in Science and Technology ; EVN project ; EVN project ; CAS-PIFI ; CAS-PIFI ; SKA pre-research grant - National Key R&D Programme of China ; SKA pre-research grant - National Key R&D Programme of China ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; NSFC ; NSFC ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; Gothenburg Centre for Advanced Studies in Science and Technology ; Gothenburg Centre for Advanced Studies in Science and Technology ; EVN project ; EVN project ; CAS-PIFI ; CAS-PIFI |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/55545]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Mohan, P. |
| 作者单位 | 1.Chalmers Univ Technol, Dept Space Earth & Environm, Onsala Space Observ, SE-43992 Onsala, Sweden 2.Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China 3.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Peoples R China |
| 推荐引用方式 GB/T 7714 | Mohan, P.,An, T.,Yang, J.. The Nearby Luminous Transient AT2018cow: A Magnetar Formed in a Subrelativistically Expanding Nonjetted Explosion[J]. ASTROPHYSICAL JOURNAL LETTERS,2020,888(2):9. |
| APA | Mohan, P.,An, T.,&Yang, J..(2020).The Nearby Luminous Transient AT2018cow: A Magnetar Formed in a Subrelativistically Expanding Nonjetted Explosion.ASTROPHYSICAL JOURNAL LETTERS,888(2),9. |
| MLA | Mohan, P.,et al."The Nearby Luminous Transient AT2018cow: A Magnetar Formed in a Subrelativistically Expanding Nonjetted Explosion".ASTROPHYSICAL JOURNAL LETTERS 888.2(2020):9. |
入库方式： OAI收割
来源：国家天文台
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