East Asian VLBI Network observations of active galactic nuclei jets: imaging with KaVA plus Tianma plus Nanshan

doi:10.1088/1674-4527/21/8/205

CORC > 新疆天文台 > 研究单元未命名 > 射电天文研究室 > 星系宇宙学研究团组

	East Asian VLBI Network observations of active galactic nuclei jets: imaging with KaVA plus Tianma plus Nanshan
	Cui, Yu-Zhu 1,2; Hada, Kazuhiro 1,2; Kino, Motoki 2,3; Sohn, Bong-Won 4,5,6; Park, Jongho 7; Ro, Hyun-Wook 4,5; Sawada-Satoh, Satoko 8; Jiang, Wu 9,11; Cui, Lang 10,11; Honma, Mareki 1,2,12
刊名	RESEARCH IN ASTRONOMY AND ASTROPHYSICS
	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.
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关键词	RADIO JET ; AGN JETS ; TELESCOPE ; GALAXIES
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES
WOS记录号	WOS:000711660200001
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
内容类型	期刊论文
源URL	[http://ir.xao.ac.cn/handle/45760611-7/4365]
专题	星系宇宙学研究团组
通讯作者	Cui, Yu-Zhu
作者单位	1.Grad Univ Adv Studies, Dept Astron Sci, SOKENDAI, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan 2.Natl Astron Observ Japan, Mizusawa VLBI Observ, 2-12 Hoshigaoka, Oshu, Iwate 0230861, Japan 3.Kogakuin Univ Technol & Engn, Acad Support Ctr, 2665-1 Nakano, Hachioji, Tokyo 1920015, Japan 4.Korea Astron & Space Sci Inst, Daejeon 34055, South Korea 5.Yonsei Univ, Dept Astron, 50 Yonsei Ro, Seoul 03722, South Korea 6.Univ Sci & Technol, Dept Astron & Space Sci, 217 Gajeong Ro, Daejeon, South Korea 7.Acad Sinica, Inst Astron & Astrophys, 645 N Aohoku Pl, Hilo, HI 96720 USA 8.Yamaguchi Univ, Grad Sch Sci & Technol Innovat, Yoshida 1677-1, Yamaguchi, Yamaguchi 7538512, Japan 9.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 10.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China
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.