East Asian VLBI Network observations of active galactic nuclei jets: imaging with KaVA plus Tianma plus Nanshan
文献类型：期刊论文
| 作者 | Cui, Yu-Zhu21,22; Hada, Kazuhiro21,22; Kino, Motoki20,21; Sohn, Bong-Won17,18,19; Park, Jongho16; Ro, Hyun-Wook18,19; Sawada-Satoh, Satoko15; Jiang, Wu12,14; Cui, Lang12,13 ; Honma, Mareki11,21,22
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| 刊名 | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
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| 出版日期 | 2021-10-01 |
| 卷号 | 21期号:8页码:15 |
| 关键词 | galaxies active galaxies jets instrumentation interferometers radio continuum galaxies |
| ISSN号 | 1674-4527 |
| DOI | 10.1088/1674-4527/21/8/205 |
| 通讯作者 | Cui, Yu-Zhu(yuzhu.cui@grad.nao.ac.jp) |
| 英文摘要 | The East Asian Very Long Baseline Interferometry (VLBI) Network (EAVN) is a rapidly evolving international VLBI array that is currently promoted under joint efforts among China, Japan and Korea. EAVN aims at forming a joint VLBI Network by combining a large number of radio telescopes distributed over East Asian regions. After the combination of the Korean VLBI Network (KVN) and the VLBI Exploration of Radio Astrometry (VERA) into KaVA, further expansion with the joint array in East Asia is actively promoted. Here we report the first imaging results (at 22 and 43 GHz) of bright radio sources obtained with KaVA connected to Tianma 65-m and Nanshan 26-m Radio Telescopes in China. To test the EAVN imaging performance for different sources, we observed four active galactic nuclei (AGN) having different brightness and morphology. As a result, we confirmed that the Tianma 65-m Radio Telescope (TMRT) significantly enhances the overall array sensitivity, a factor of 4 improvement in baseline sensitivity and 2 in image dynamic range compared to the case of KaVA only. The addition of the Nanshan 26-m Radio Telescope (NSRT) further doubled the east-west angular resolution. With the resulting high-dynamic-range, high-resolution images with EAVN (KaVA+TMRT+NSRT), various fine-scale structures in our targets, such as the counter-jet in M87, a kink-like morphology of the 3C 273 jet and the weak emission in other sources are successfully detected. This demonstrates the powerful capability of EAVN to study AGN jets and to achieve other science goals in general. Ongoing expansion of EAVN will further enhance the angular resolution, detection sensitivity and frequency coverage of the network. |
| WOS关键词 | RADIO JET ; AGN JETS ; TELESCOPE ; GALAXIES |
| 资助项目 | Graduate University for Advanced Studies (SOKENDAI) ; Japanese Government (MEXT) Scholarship ; JSPS KAKENHI[JP18K03656] ; JSPS KAKENHI[JP18H03721] ; JSPS KAKENHI[JP19H01943] ; JSPS KAKENHI[JP18KK0090] ; Mitsubishi Foundation[201911019] ; EACOA Fellowship - East Asia Core Observatories Association of the Academia Sinica Institute of Astronomy and Astrophysics ; EACOA Fellowship - East Asia Core Observatories Association of the National Astronomical Observatory of Japan ; EACOA Fellowship - East Asia Core Observatories Association of the Center for Astronomical Mega-Science ; EACOA Fellowship - East Asia Core Observatories Association of the Chinese Academy of Sciences ; EACOA Fellowship - East Asia Core Observatories Association of the Korea Astronomy and Space Science Institute ; National Research Foundation (NRF) of Korea[2014H1A2A1018695] ; National Research Foundation (NRF) of Korea[2015H1A2A1033752] ; NRF[2019R1F1A1059721] ; Major Program of the National Natural Science Foundation of China (NSFC)[11590780] ; Major Program of the National Natural Science Foundation of China (NSFC)[11590784] ; Knowledge Innovation Program of the Chinese Academy of Sciences[KJCX1-YW-18] ; Scientific Program of Shanghai Municipality[08DZ1160100] ; Key Laboratory for Radio Astronomy, CAS ; NSFC[11803071] ; NSFC[U2031212] ; NSFC[61931002] ; NSFC[11933007] ; National Key R&D Program of China[2018YFA0404602] ; CAS 'Light of West China' Program[2018-XBQNXZ-B-021] ; Youth Innovation Promotion Association of the CAS[2017084] ; Fundamental Research Grant Scheme (FRGS)[FRGS/1/2019/STG02/UM/02/6] ; Max Planck Partner Group of the MPG ; CAS ; Research Program of Fundamental and Frontier Sciences, CAS[ZDBS-LY-SLH011] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000711660200001 |
| 出版者 | NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES |
| 资助机构 | Graduate University for Advanced Studies (SOKENDAI) ; Japanese Government (MEXT) Scholarship ; JSPS KAKENHI ; Mitsubishi Foundation ; EACOA Fellowship - East Asia Core Observatories Association of the Academia Sinica Institute of Astronomy and Astrophysics ; EACOA Fellowship - East Asia Core Observatories Association of the National Astronomical Observatory of Japan ; EACOA Fellowship - East Asia Core Observatories Association of the Center for Astronomical Mega-Science ; EACOA Fellowship - East Asia Core Observatories Association of the Chinese Academy of Sciences ; EACOA Fellowship - East Asia Core Observatories Association of the Korea Astronomy and Space Science Institute ; National Research Foundation (NRF) of Korea ; NRF ; Major Program of the National Natural Science Foundation of China (NSFC) ; Knowledge Innovation Program of the Chinese Academy of Sciences ; Scientific Program of Shanghai Municipality ; Key Laboratory for Radio Astronomy, CAS ; NSFC ; National Key R&D Program of China ; CAS 'Light of West China' Program ; Youth Innovation Promotion Association of the CAS ; Fundamental Research Grant Scheme (FRGS) ; Max Planck Partner Group of the MPG ; CAS ; Research Program of Fundamental and Frontier Sciences, CAS |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/4365]  |
| 专题 | 星系宇宙学研究团组 25米望远镜运行组 微波接收机技术实验室 脉冲星研究团组 射电天文研究室_行星科学研究组 射电天文研究室_南山观测站 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 | Cui, Yu-Zhu |
| 作者单位 | 1.Seoul Natl Univ, SNU Astron Res Ctr, Seoul 08826, South Korea 2.Max Planck Inst Radio Astron, Hugel 69, D-53121 Bonn, Germany 3.Seoul Natl Univ, Dept Phys & Astron, Seoul 08826, South Korea 4.Toyo Univ, Bunkyo Ku, 5-28-20 Hakusan, Tokyo 1128606, Japan 5.Natl Radio Astron Observ, 520 Edgemont Rd, Charlottesville, VA 22903 USA 6.MIT, Haystack Observ, 99 Millstone Rd, Westford, MA 01886 USA 7.Space Light Lab, 77,Yangjaedae Ro 86 Rd, Seoul, South Korea 8.Ibaraki Univ, Ctr Astron, 2-1-1 Bunkyo, Mito, Ibaraki 3108512, Japan 9.Univ Malaya, Fac Sci, Dept Phys, Kuala Lumpur 50603, Malaysia 10.CSIC, Inst Astrofis Andalucia, Glorieta Astron S-N, E-18008 Granada, Spain |
| 推荐引用方式 GB/T 7714 | Cui, Yu-Zhu,Hada, Kazuhiro,Kino, Motoki,et al. East Asian VLBI Network observations of active galactic nuclei jets: imaging with KaVA plus Tianma plus Nanshan[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2021,21(8):15. |
| APA | Cui, Yu-Zhu.,Hada, Kazuhiro.,Kino, Motoki.,Sohn, Bong-Won.,Park, Jongho.,...&Zhang, Bo.(2021).East Asian VLBI Network observations of active galactic nuclei jets: imaging with KaVA plus Tianma plus Nanshan.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,21(8),15. |
| MLA | Cui, Yu-Zhu,et al."East Asian VLBI Network observations of active galactic nuclei jets: imaging with KaVA plus Tianma plus Nanshan".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 21.8(2021):15. |
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