Locating the missing large-scale emission in the jet of M87*with short EHT baselines
文献类型：期刊论文
| 作者 | Georgiev, Boris2; Tiede, Paul3,4; Fellenberg, Sebastiano D. von5,6; Janssen, Michael6,7; Natarajan, Iniyan3,4; Blackburn, Lindy3,4; Park, Jongho8,9,10; Chavez, Erandi3; West, Andrew T.2; Moriyama, Kotaro11,12 |
| 刊名 | ASTRONOMY & ASTROPHYSICS
 |
| 出版日期 | 2026-05-08 |
| 卷号 | 709 |
| 关键词 | black hole physics techniques: interferometric galaxies: active galaxies: individual: M87* galaxies: jets |
| ISSN号 | 0004-6361 |
| DOI | 10.1051/0004-6361/202557013 |
| 产权排序 | 第116完成单位 |
| 文献子类 | Article |
| 英文摘要 | In very-long baseline interferometric arrays, nearly co-located stations probe the largest scales and typically cannot resolve the observed source. In the absence of a large-scale structure, closure phases constructed with these stations are zero and, since they are independent of station-based errors, they can be used to probe data issues. Here, we show how these trivial closure phases become nonzero with a brightness distribution on smaller scales than their short baseline would suggest. When applied to sources that are made up of a bright compact and large-scale diffuse component, the trivial closure phases directly measure the centroid relative to the compact source and higher-order image moments. We present a technique to measure these image moments with minimal model assumptions and validate it on synthetic Event Horizon Telescope (EHT) data. We then apply this technique to 2017 and 2018 EHT observations of M87* and find a weak preference for extended emission in the direction of the large-scale jet. We also apply it to 2021 EHT data and measure the source centroid about 1 mas northwest of the compact ring, which is consistent with the jet observed at lower frequencies. |
| 学科主题 | 天文学 ; 天体物理学 ; 高能天体物理学 ; 星系与宇宙学 |
| URL标识 | 查看原文 |
| 出版地 | 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE |
| WOS关键词 | M87 EVENT HORIZON ; BAND MULTIWAVELENGTH PROPERTIES ; RESULTS. VII. POLARIZATION ; BLACK-HOLE ; TELESCOPE ; SHADOW ; I. ; KINEMATICS ; PARSEC ; VI. |
| 资助项目 | Research Council of Finland[362572]; Agencia Nacional de Investigacion y Desarrollo (ANID),[NCN19_058]; Agencia Nacional de Investigacion y Desarrollo (ANID),[1221421]; Agencia Nacional de Investigacion y Desarrollo (ANID),[FB210003]; Alexander von Humboldt Stiftung; Alfred P. Sloan Research Fellowship; European Union NextGenerationEU[PRTRC17I1]; John Templeton Foundation; Gordon and Betty Moore Foundation; Canada Research Chairs (CRC) program;[DD7-18089X]; Canada Research Chairs (CRC) program;[TM6-17006X]; China Scholarship Council; China Postdoctoral Science Foundation fellowships |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001761811100001 |
| 出版者 | EDP SCIENCES S A |
| 资助机构 | Research Council of Finland[362572] ; Agencia Nacional de Investigacion y Desarrollo (ANID),[NCN19_058, 1221421, FB210003] ; Alexander von Humboldt Stiftung ; Alfred P. Sloan Research Fellowship ; European Union NextGenerationEU[PRTRC17I1] ; John Templeton Foundation ; Gordon and Betty Moore Foundation ; Canada Research Chairs (CRC) program ; [DD7-18089X, TM6-17006X] ; China Scholarship Council ; China Postdoctoral Science Foundation fellowships |
| 版本 | 出版稿 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/29239]  |
| 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 | Georgiev, Boris |
| 作者单位 | 1.Gemini Observatory/NSF NOIRLab, 670 N. A’ohōkū Place, Hilo, HI 96720, USA; 2.Steward Observatory and Department of Astronomy, University of Arizona, 933 N. Cherry Ave., Tucson, AZ 85721, USA; 3.Center for Astrophysics | Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USA; 4.Black Hole Initiative at Harvard University, 20 Garden Street, Cambridge, MA 02138, USA; 5.Canadian Institute for Theoretical Astrophysics, University of Toronto, 60 St. George Street, Toronto, ON M5S 3H8, Canada; 6.Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, Germany; 7.Department of Astrophysics, Institute for Mathematics, Astrophysics and Particle Physics (IMAPP), Radboud University, P.O. Box 9010, 6500 GL, Nijmegen, The Netherlands; 8.School of Space Research, Kyung Hee University, 1732, Deogyeong-daero, Giheung-gu, Yongin-si, Gyeonggi-do, 17104, Republic of Korea; 9.G-LAMP NEXUS Institute, Kyung Hee University, Yongin 17104, Republic of Korea; 10.Institute of Astronomy and Astrophysics, Academia Sinica, P.O. Box 23-141 Taipei 10617, Taiwan, ROC; |
| 推荐引用方式 GB/T 7714 | Georgiev, Boris,Tiede, Paul,Fellenberg, Sebastiano D. von,et al. Locating the missing large-scale emission in the jet of M87*with short EHT baselines[J]. ASTRONOMY & ASTROPHYSICS,2026,709. |
| APA | Georgiev, Boris.,Tiede, Paul.,Fellenberg, Sebastiano D. von.,Janssen, Michael.,Natarajan, Iniyan.,...&Zhao, Shan-Shan.(2026).Locating the missing large-scale emission in the jet of M87*with short EHT baselines.ASTRONOMY & ASTROPHYSICS,709. |
| MLA | Georgiev, Boris,et al."Locating the missing large-scale emission in the jet of M87*with short EHT baselines".ASTRONOMY & ASTROPHYSICS 709(2026). |
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来源：云南天文台
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