Super-Resolved Image of M87 Observed with East Asian VLBI Network
文献类型：期刊论文
| 作者 | Tazaki, Fumie19; Cui, Yuzhu17,18; Hada, Kazuhiro16; Kino, Motoki15,16; Cho, Ilje1; Zhao, Guang-Yao1; Akiyama, Kazunori3,4,16; Mizuno, Yosuke5,6,18; Ro, Hyunwook7,8; Honma, Mareki9,10,16 |
| 刊名 | Galaxies
 |
| 出版日期 | 2023-02-01 |
| 卷号 | 11期号:2页码:39 |
| 关键词 | active galactic nuclei jet very-long-baseline interferometry M87 imaging |
| ISSN号 | 2075-4434 |
| DOI | 10.3390/galaxies11020039 |
| 产权排序 | 18 |
| 英文摘要 | Obtaining high-resolution images at centimeter-or-longer wavelengths is vital for understanding the physics of jets. We reconstructed images from the M87 22 GHz data observed with the East Asian VLBI Network (EAVN) by using the regularized maximum likelihood (RML) method, which is different from the conventional imaging method CLEAN. Consequently, a bright core and jet extending about 30 mas to the northwest were detected with a higher resolution than in the CLEAN image. The width of the jet was 0.5 mas at 0.3 mas from the core, consistent with the width measured in the 86 GHz image in the previous study. In addition, three ridges were able to be detected at around 8 mas from the core, even though the peak-to-peak separation was only 1.0 mas. This indicates that the RML image’s spatial resolution is at least 30% higher than that of the CLEAN image. This study is an important step for future multi-frequency and high-cadence observations of the EAVN to discuss the more detailed structure of the jet and its time variability. |
| URL标识 | 查看原文 |
| 语种 | 英语 |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/6649]  |
| 专题 | 星系宇宙学研究团组 射电天文研究室_利用南山26米射电望远镜观测数据的文章 |
| 通讯作者 | Tazaki, Fumie |
| 作者单位 | 1.Instituto de Astrofísica de Andalucía-CSIC, Glorieta de la Astronomía s/n, E-18008 Granada, Spain; 2.Center for Astronomy, Ibaraki University, Ibaraki 310-8512, Japan 3.Massachusetts Institute of Technology Haystack Observatory, Westford, MA 01886, USA; 4.Black Hole Initiative, Harvard University, Cambridge, MA 02138, USA; 5.School of Physics & Astronomy, Shanghai Jiao Tong University, 800 Dongchuan Road,;Shanghai 200240, China; 6.Institut für Theoretische Physik, Goethe-Universität Frankfurt, Max-von-Laue-Straße 1,;D-60438 Frankfurt am Main, Germany; 7.Department of Astronomy, Yonsei University, Seodaemun-gu, Seoul 03722, Republic of Korea; 8.Korea Astronomy and Space Science Institute, Yuseong-gu, Daejeon 34055, Republic of Korea; 9.Department of Astronomical Science, The Graduate University for Advanced Studies, SOKENDAI, Tokyo 181-8588, Japan; 10.Institute of Astronomy, The University of Tokyo, Tokyo 181-0015, Japan; |
| 推荐引用方式 GB/T 7714 | Tazaki, Fumie,Cui, Yuzhu,Hada, Kazuhiro,et al. Super-Resolved Image of M87 Observed with East Asian VLBI Network[J]. Galaxies,2023,11(2):39. |
| APA | Tazaki, Fumie.,Cui, Yuzhu.,Hada, Kazuhiro.,Kino, Motoki.,Cho, Ilje.,...&Yonekura, Yoshinori.(2023).Super-Resolved Image of M87 Observed with East Asian VLBI Network.Galaxies,11(2),39. |
| MLA | Tazaki, Fumie,et al."Super-Resolved Image of M87 Observed with East Asian VLBI Network".Galaxies 11.2(2023):39. |
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