Resolving the Inner Parsec of the Blazar J1924-2914 with the Event Horizon Telescope | |
Issaoun, Sara1,144,145; Wielgus, Maciek143; Jorstad, Svetlana142; Krichbaum, Thomas P.143; Blackburn, Lindy141,145; Janssen, Michael143; Chan, Chi-kwan139,140; Pesce, Dominic W.141,145; Gómez, José L.138; Akiyama, Kazunori136,137,141 | |
刊名 | ASTROPHYSICAL JOURNAL |
2022-08-01 | |
卷号 | 934期号:2 |
ISSN号 | 0004-637X |
DOI | 10.3847/1538-4357/ac7a40 |
产权排序 | 第103完成单位 |
文献子类 | Article |
英文摘要 | The blazar J1924-2914 is a primary Event Horizon Telescope (EHT) calibrator for the Galactic center's black hole Sagittarius A*. Here we present the first total and linearly polarized intensity images of this source obtained with the unprecedented 20 mu as resolution of the EHT. J1924-2914 is a very compact flat-spectrum radio source with strong optical variability and polarization. In April 2017 the source was observed quasi-simultaneously with the EHT (April 5-11), the Global Millimeter VLBI Array (April 3), and the Very Long Baseline Array (April 28), giving a novel view of the source at four observing frequencies, 230, 86, 8.7, and 2.3 GHz. These observations probe jet properties from the subparsec to 100 pc scales. We combine the multifrequency images of J1924-2914 to study the source morphology. We find that the jet exhibits a characteristic bending, with a gradual clockwise rotation of the jet projected position angle of about 90 degrees between 2.3 and 230 GHz. Linearly polarized intensity images of J1924-2914 with the extremely fine resolution of the EHT provide evidence for ordered toroidal magnetic fields in the blazar compact core. |
学科主题 | 天文学 ; 射电天文学 ; 星系与宇宙学 |
URL标识 | 查看原文 |
出版地 | TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND |
资助项目 | National Science Foundation[OISE-1743747] ; National Science Foundation[AST-1816420] ; National Science Foundation[AST-1716536] ; National Science Foundation[AST1440254] ; National Science Foundation[AST-1935980] ; Gordon and Betty Moore Foundation[GBMF-5278] ; NASA Hubble Fellowship - Space Telescope Science Institute[HST-HF2-51431.001-A] ; NASA[NAS5-26555] |
WOS关键词 | SAGITTARIUS A-ASTERISK ; MAGNETIC-FIELD STRUCTURE ; RELATIVISTIC JETS ; BLACK-HOLES ; RESULTS. I. ; AGN JETS ; POLARIZATION ; VLBI ; M87 ; SHADOW |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | IOP Publishing Ltd |
WOS记录号 | WOS:000835050100001 |
资助机构 | National Science Foundation[OISE-1743747, AST-1816420, AST-1716536, AST1440254, AST-1935980] ; Gordon and Betty Moore Foundation[GBMF-5278] ; NASA Hubble Fellowship - Space Telescope Science Institute[HST-HF2-51431.001-A] ; NASA[NAS5-26555] |
内容类型 | 期刊论文 |
版本 | 出版稿 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/25520] |
专题 | 云南天文台_中国科学院天体结构与演化重点实验室 |
通讯作者 | Issaoun, Sara |
作者单位 | 1.NASA Hubble Fellowship Program, Einstein Fellow; 2.Bard College, 30 Campus Road, Annandale-on-Hudson, NY 12504, USA 3.Astronomy Department, University of Science and Technology of China, Hefei 230026, People's Republic of China; 4.School of Astronomy and Space Sciences, University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, People's Republic of China; 5.Mullard Space Science Laboratory, University College London, Holmbury St. Mary, Dorking, Surrey, RH5 6NT, UK; 6.School of Physics, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, People's Republic of China; 7.Princeton Gravity Initiative, Princeton University, Princeton, New Jersey 08544, USA; 8.Radboud Excellence Fellow of Radboud University, Nijmegen, The Netherlands; 9.Tuorla Observatory, Department of Physics and Astronomy, University of Turku, Finland; 10.Physics Department, Brandeis University, 415 South Street, Waltham, MA 02453, USA; |
推荐引用方式 GB/T 7714 | Issaoun, Sara,Wielgus, Maciek,Jorstad, Svetlana,et al. Resolving the Inner Parsec of the Blazar J1924-2914 with the Event Horizon Telescope[J]. ASTROPHYSICAL JOURNAL,2022,934(2). |
APA | Issaoun, Sara.,Wielgus, Maciek.,Jorstad, Svetlana.,Krichbaum, Thomas P..,Blackburn, Lindy.,...&Zhao, Shan-Shan.(2022).Resolving the Inner Parsec of the Blazar J1924-2914 with the Event Horizon Telescope.ASTROPHYSICAL JOURNAL,934(2). |
MLA | Issaoun, Sara,et al."Resolving the Inner Parsec of the Blazar J1924-2914 with the Event Horizon Telescope".ASTROPHYSICAL JOURNAL 934.2(2022). |
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