East Asian VLBI Network observations of active galactic nuclei jets: Imaging with KaVA+Tianma+Nanshan

Yu Zhu Cui; Kazuhiro Hada; Motoki Kino; Bong Won Sohn; Jongho Park; Hyun Wook Ro; Satoko Sawada-Satoh; Wu Jiang; Lang Cui; Mareki Honma; Zhi Qiang Shen; Fumie Tazaki; Tao An; Ilje Cho; Guang Yao Zhao; Xiao Peng Cheng; Kotaro Niinuma; Kiyoaki Wajima; Ying Kang Zhang; Noriyuki Kawaguchi; Juan Carlos Algaba; Shoko Koyama; Tomoya Hirota; Yoshinori Yonekura; Nobuyuki Sakai; Bo Xia; Yong Bin Jiang; Lin Feng Yu; Wei Gou; Ju Yeon Hwang; Yong Chen Jiang; Yun Xia Sun; Dong Kyu Jung; Hyo Ryoung Kim; Jeong Sook Kim; Hideyuki Kobayashi; Jee Won Lee; Jeong Ae Lee; Hua Zhang; Guang Hui Li; Zhi Qiang Xu; Peng Li; Jung Hwan Oh; Se Jin Oh; Chung Sik Oh; Tomoaki Oyama; Duk Gyoo Roh; Katsunori M. Shibata; Wen Guo; Rong Bing Zhao; Wei Ye Zhong; Jin Qing Wang; Wen Jun Yang; Hao Yan; Jae Hwan Yeom; Bin Li; Xiao Fei Li; Jian Ping Yuan; Jian Dong; Zhong Chen; Kazunori Akiyama; Keiichi Asada; Do Young Byun; Yoshiaki Hagiwara; Jeffrey Hodgson; Tae Hyun Jung; Kee Tae Kim; Sang Sung Lee; Kunwoo Yi; Qing Hui Liu; Xiang Liu; Ru Sen Lu; Masanori Nakamura; Sascha Trippe; Na Wang; Xue Zheng Wang; Bo Zhang

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

East Asian VLBI Network observations of active galactic nuclei jets: Imaging with KaVA+Tianma+Nanshan

Yu Zhu Cui, Kazuhiro Hada, Motoki Kino, Bong Won Sohn, Jongho Park, Hyun Wook Ro, Satoko Sawada-Satoh, Wu Jiang, Lang Cui, Mareki Honma, Zhi Qiang Shen, Fumie Tazaki, Tao An, Ilje Cho, Guang Yao Zhao, Xiao Peng Cheng, Kotaro Niinuma, Kiyoaki Wajima, Ying Kang Zhang, Noriyuki KawaguchiJuan Carlos Algaba, Shoko Koyama, Tomoya Hirota, Yoshinori Yonekura, Nobuyuki Sakai, Bo Xia, Yong Bin Jiang, Lin Feng Yu, Wei Gou, Ju Yeon Hwang, Yong Chen Jiang, Yun Xia Sun, Dong Kyu Jung, Hyo Ryoung Kim, Jeong Sook Kim, Hideyuki Kobayashi, Jee Won Lee, Jeong Ae Lee, Hua Zhang, Guang Hui Li, Zhi Qiang Xu, Peng Li, Jung Hwan Oh, Se Jin Oh, Chung Sik Oh, Tomoaki Oyama, Duk Gyoo Roh, Katsunori M. Shibata, Wen Guo, Rong Bing Zhao, Wei Ye Zhong, Jin Qing Wang, Wen Jun Yang, Hao Yan, Jae Hwan Yeom, Bin Li, Xiao Fei Li, Jian Ping Yuan, Jian Dong, Zhong Chen, Kazunori Akiyama, Keiichi Asada, Do Young Byun, Yoshiaki Hagiwara, Jeffrey Hodgson, Tae Hyun Jung, Kee Tae Kim, Sang Sung Lee, Kunwoo Yi, Qing Hui Liu, Xiang Liu, Ru Sen Lu, Masanori Nakamura, Sascha Trippe, Na Wang, Xue Zheng Wang, Bo Zhang

Department of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

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.

Original language	English
Article number	205
Journal	Research in Astronomy and Astrophysics
Volume	21
Issue number	8
DOIs	https://doi.org/10.1088/1674-4527/21/8/205
State	Published - Aug 2021

Bibliographical note

Publisher Copyright:
© 2021 Institute of Physics Publishing. All rights reserved.

Keywords

Galaxies: Active
Galaxies: Jets
Instrumentation: Interferometers
Radio continuum: Galaxies

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10.1088/1674-4527/21/8/205

Cite this

Cui, Y. Z., Hada, K., Kino, M., Sohn, B. W., Park, J., Ro, H. W., Sawada-Satoh, S., Jiang, W., Cui, L., Honma, M., Shen, Z. Q., Tazaki, F., An, T., Cho, I., Zhao, G. Y., Cheng, X. P., Niinuma, K., Wajima, K., Zhang, Y. K., ... Zhang, B. (2021). East Asian VLBI Network observations of active galactic nuclei jets: Imaging with KaVA+Tianma+Nanshan. Research in Astronomy and Astrophysics, 21(8), Article 205. https://doi.org/10.1088/1674-4527/21/8/205

@article{7a8e946a77804b588ee47ebc34797949,

title = "East Asian VLBI Network observations of active galactic nuclei jets: Imaging with KaVA+Tianma+Nanshan",

abstract = "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.",

keywords = "Galaxies: Active, Galaxies: Jets, Instrumentation: Interferometers, Radio continuum: Galaxies",

author = "Cui, {Yu Zhu} and Kazuhiro Hada and Motoki Kino and Sohn, {Bong Won} and Jongho Park and Ro, {Hyun Wook} and Satoko Sawada-Satoh and Wu Jiang and Lang Cui and Mareki Honma and Shen, {Zhi Qiang} and Fumie Tazaki and Tao An and Ilje Cho and Zhao, {Guang Yao} and Cheng, {Xiao Peng} and Kotaro Niinuma and Kiyoaki Wajima and Zhang, {Ying Kang} and Noriyuki Kawaguchi and Algaba, {Juan Carlos} and Shoko Koyama and Tomoya Hirota and Yoshinori Yonekura and Nobuyuki Sakai and Bo Xia and Jiang, {Yong Bin} and Yu, {Lin Feng} and Wei Gou and Hwang, {Ju Yeon} and Jiang, {Yong Chen} and Sun, {Yun Xia} and Jung, {Dong Kyu} and Kim, {Hyo Ryoung} and Kim, {Jeong Sook} and Hideyuki Kobayashi and Lee, {Jee Won} and Lee, {Jeong Ae} and Hua Zhang and Li, {Guang Hui} and Xu, {Zhi Qiang} and Peng Li and Oh, {Jung Hwan} and Oh, {Se Jin} and Oh, {Chung Sik} and Tomoaki Oyama and Roh, {Duk Gyoo} and Shibata, {Katsunori M.} and Wen Guo and Zhao, {Rong Bing} and Zhong, {Wei Ye} and Wang, {Jin Qing} and Yang, {Wen Jun} and Hao Yan and Yeom, {Jae Hwan} and Bin Li and Li, {Xiao Fei} and Yuan, {Jian Ping} and Jian Dong and Zhong Chen and Kazunori Akiyama and Keiichi Asada and Byun, {Do Young} and Yoshiaki Hagiwara and Jeffrey Hodgson and Jung, {Tae Hyun} and Kim, {Kee Tae} and Lee, {Sang Sung} and Kunwoo Yi and Liu, {Qing Hui} and Xiang Liu and Lu, {Ru Sen} and Masanori Nakamura and Sascha Trippe and Na Wang and Wang, {Xue Zheng} and Bo Zhang",

year = "2021",

month = aug,

doi = "10.1088/1674-4527/21/8/205",

language = "English",

volume = "21",

journal = "Research in Astronomy and Astrophysics",

issn = "1674-4527",

publisher = "IOP Publishing Ltd.",

number = "8",

}

Cui, YZ, Hada, K, Kino, M, Sohn, BW, Park, J, Ro, HW, Sawada-Satoh, S, Jiang, W, Cui, L, Honma, M, Shen, ZQ, Tazaki, F, An, T, Cho, I, Zhao, GY, Cheng, XP, Niinuma, K, Wajima, K, Zhang, YK, Kawaguchi, N, Algaba, JC, Koyama, S, Hirota, T, Yonekura, Y, Sakai, N, Xia, B, Jiang, YB, Yu, LF, Gou, W, Hwang, JY, Jiang, YC, Sun, YX, Jung, DK, Kim, HR, Kim, JS, Kobayashi, H, Lee, JW, Lee, JA, Zhang, H, Li, GH, Xu, ZQ, Li, P, Oh, JH, Oh, SJ, Oh, CS, Oyama, T, Roh, DG, Shibata, KM, Guo, W, Zhao, RB, Zhong, WY, Wang, JQ, Yang, WJ, Yan, H, Yeom, JH, Li, B, Li, XF, Yuan, JP, Dong, J, Chen, Z, Akiyama, K, Asada, K, Byun, DY, Hagiwara, Y, Hodgson, J, Jung, TH, Kim, KT, Lee, SS, Yi, K, Liu, QH, Liu, X, Lu, RS, Nakamura, M, Trippe, S, Wang, N, Wang, XZ & Zhang, B 2021, 'East Asian VLBI Network observations of active galactic nuclei jets: Imaging with KaVA+Tianma+Nanshan', Research in Astronomy and Astrophysics, vol. 21, no. 8, 205. https://doi.org/10.1088/1674-4527/21/8/205

TY - JOUR

T1 - East Asian VLBI Network observations of active galactic nuclei jets

T2 - Imaging with KaVA+Tianma+Nanshan

AU - Cui, Yu Zhu

AU - Hada, Kazuhiro

AU - Kino, Motoki

AU - Sohn, Bong Won

AU - Park, Jongho

AU - Ro, Hyun Wook

AU - Sawada-Satoh, Satoko

AU - Jiang, Wu

AU - Cui, Lang

AU - Honma, Mareki

AU - Shen, Zhi Qiang

AU - Tazaki, Fumie

AU - An, Tao

AU - Cho, Ilje

AU - Zhao, Guang Yao

AU - Cheng, Xiao Peng

AU - Niinuma, Kotaro

AU - Wajima, Kiyoaki

AU - Zhang, Ying Kang

AU - Kawaguchi, Noriyuki

AU - Algaba, Juan Carlos

AU - Koyama, Shoko

AU - Hirota, Tomoya

AU - Yonekura, Yoshinori

AU - Sakai, Nobuyuki

AU - Xia, Bo

AU - Jiang, Yong Bin

AU - Yu, Lin Feng

AU - Gou, Wei

AU - Hwang, Ju Yeon

AU - Jiang, Yong Chen

AU - Sun, Yun Xia

AU - Jung, Dong Kyu

AU - Kim, Hyo Ryoung

AU - Kim, Jeong Sook

AU - Kobayashi, Hideyuki

AU - Lee, Jee Won

AU - Lee, Jeong Ae

AU - Zhang, Hua

AU - Li, Guang Hui

AU - Xu, Zhi Qiang

AU - Li, Peng

AU - Oh, Jung Hwan

AU - Oh, Se Jin

AU - Oh, Chung Sik

AU - Oyama, Tomoaki

AU - Roh, Duk Gyoo

AU - Shibata, Katsunori M.

AU - Guo, Wen

AU - Zhao, Rong Bing

AU - Zhong, Wei Ye

AU - Wang, Jin Qing

AU - Yang, Wen Jun

AU - Yan, Hao

AU - Yeom, Jae Hwan

AU - Li, Bin

AU - Li, Xiao Fei

AU - Yuan, Jian Ping

AU - Dong, Jian

AU - Chen, Zhong

AU - Akiyama, Kazunori

AU - Asada, Keiichi

AU - Byun, Do Young

AU - Hagiwara, Yoshiaki

AU - Hodgson, Jeffrey

AU - Jung, Tae Hyun

AU - Kim, Kee Tae

AU - Lee, Sang Sung

AU - Yi, Kunwoo

AU - Liu, Qing Hui

AU - Liu, Xiang

AU - Lu, Ru Sen

AU - Nakamura, Masanori

AU - Trippe, Sascha

AU - Wang, Na

AU - Wang, Xue Zheng

AU - Zhang, Bo

PY - 2021/8

Y1 - 2021/8

N2 - 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.

AB - 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.

KW - Galaxies: Active

KW - Galaxies: Jets

KW - Instrumentation: Interferometers

KW - Radio continuum: Galaxies

UR - http://www.scopus.com/inward/record.url?scp=85119487387&partnerID=8YFLogxK

U2 - 10.1088/1674-4527/21/8/205

DO - 10.1088/1674-4527/21/8/205

M3 - Article

AN - SCOPUS:85119487387

SN - 1674-4527

VL - 21

JO - Research in Astronomy and Astrophysics

JF - Research in Astronomy and Astrophysics

IS - 8

M1 - 205

ER -

East Asian VLBI Network observations of active galactic nuclei jets: Imaging with KaVA+Tianma+Nanshan

Abstract

Bibliographical note

Keywords

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