First polarization study of the M87 jet and active galactic nuclei at submillimeter wavelengths with ALMA
文献类型：期刊论文
| 作者 | Goddi, Ciriaco157,158,159; Carlos, Douglas F.158; Crew, Geoffrey B.156; Matthews, Lynn D.156; Messias, Hugo155; Mus, Alejandro154,159; Martí, Iván152,153; Albentosa, Ezequiel153; Laurentis, Mariafelicia De150,151; Liuzzo, Elisabetta149 |
| 刊名 | ASTRONOMY & ASTROPHYSICS
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| 出版日期 | 2025-07-17 |
| 卷号 | 699 |
| 关键词 | black hole physics magnetic fields polarization radiation mechanisms: non-thermal instrumentation: interferometers instrumentation: polarimeters |
| ISSN号 | 0004-6361 |
| DOI | 10.1051/0004-6361/202554140 |
| 产权排序 | 第111完成单位 |
| 文献子类 | Article |
| 英文摘要 | Aims. We investigated the polarization and Faraday properties of Messier 87 (M87) and seven other radio-loud active galactic nuclei (AGNs) at lambda 0.87 mm (345 GHz) using the Atacama Large Millimeter/submillimeter Array (ALMA). Our goal was to characterize the linear polarization (LP) fractions, measure Faraday rotation measures (RMs), and examine the magnetic field structures in the emission regions of these AGNs. Methods. We conducted full-polarization observations as part of the ALMA Band 7 very long baseline interferometry (VLBI) commissioning during the April 2021 Event Horizon Telescope (EHT) campaign. We analyzed the LP fractions and RMs to assess the nature of Faraday screens and magnetic fields in the submillimeter emission regions. Results. We find LP fractions between 1% and 17% and RMs exceeding 10(5) rad m(-2), which are 1-2 orders of magnitude higher than typically observed at longer wavelengths (lambda>3 mm). This suggests denser Faraday screens or stronger magnetic fields. Additionally, we present the first submillimeter polarized images of the M87 jet and the observed AGNs, revealing RM gradients and sign reversals in the M87 jet indicative of a kiloparsec-scale helical magnetic field structure. Conclusions. Our results provide essential constraints for calibrating, analyzing, and interpreting VLBI data from the EHT at 345 GHz, representing a critical step toward submillimeter VLBI imaging. |
| 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 | RESULTS. VII. POLARIZATION ; MAGNETIC-FIELD STRUCTURE ; SUPERMASSIVE BLACK-HOLE ; EVENT HORIZON ; ROTATION MEASURE ; ACCRETION FLOW ; SHADOW ; I. ; POLARIMETRY ; VI. |
| 资助项目 | N/A |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001535165800023 |
| 出版者 | EDP SCIENCES S A |
| 资助机构 | N/A |
| 版本 | 出版稿 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/28508]  |
| 专题 | 星系类星体研究组 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 | Goddi, Ciriaco |
| 作者单位 | 1.INFN Sez. di Trieste, I-34127 Trieste, Italy; 2.Department of Physics and Astronomy, Michigan State University, 567 Wilson Rd, East Lansing, MI 48824, USA 3.Astronomy Department, University of Science and Technology of China, Hefei 230026, PR China; 4.Center for Astronomy and Astrophysics and Department of Physics, Fudan University, Shanghai 200438, PR 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, PR China; 7.School of Natural Sciences, Institute for Advanced Study, 1 Einstein Drive, Princeton, NJ 08540, USA; 8.Radboud Excellence Fellow of Radboud University, Nijmegen, The Netherlands; 9.Tuorla Observatory, Department of Physics and Astronomy, University of Turku, FI-20014 Turun Yliopisto, Finland; 10.Physics Department, Brandeis University, 415 South Street, Waltham, MA 02453, USA; |
| 推荐引用方式 GB/T 7714 | Goddi, Ciriaco,Carlos, Douglas F.,Crew, Geoffrey B.,et al. First polarization study of the M87 jet and active galactic nuclei at submillimeter wavelengths with ALMA[J]. ASTRONOMY & ASTROPHYSICS,2025,699. |
| APA | Goddi, Ciriaco.,Carlos, Douglas F..,Crew, Geoffrey B..,Matthews, Lynn D..,Messias, Hugo.,...&Zhao, Shan-Shan.(2025).First polarization study of the M87 jet and active galactic nuclei at submillimeter wavelengths with ALMA.ASTRONOMY & ASTROPHYSICS,699. |
| MLA | Goddi, Ciriaco,et al."First polarization study of the M87 jet and active galactic nuclei at submillimeter wavelengths with ALMA".ASTRONOMY & ASTROPHYSICS 699(2025). |
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来源：云南天文台
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