VLBI observations of bright AGN jets with the KVN and VERA Array (KaVA): Evaluation of imaging capability

Kotaro Niinuma, Sang Sung Lee, Motoki Kino, Bong Won Sohn, Kazunori Akiyama, Guang Yao Zhao, Satoko Sawada-Satoh, Sascha Trippe, Kazuhiro Hada, Taehyun Jung, Yoshiaki Hagiwara, Richard Dodson, Shoko Koyama, Mareki Honma, Hiroshi Nagai, Aeree Chung, Akihiro Doi, Kenta Fujisawa, Myoung Hee Han, Joeng Sook KimJeewon Lee, Jeong Ae Lee, Atsushi Miyazaki, Tomoaki Oyama, Kazuo Sorai, Kiyoaki Wajima, Jaehan Bae, Do Young Byun, Se Hyung Cho, Yoon Kyung Choi, Hyunsoo Chung, Moon Hee Chung, Seog Tae Han, Tomoya Hirota, Jung Wook Hwang, Do Heung Je, Takaaki Jike, Dong Kyu Jung, Jin Seung Jung, Ji Hyun Kang, Jiman Kang, Yong Woo Kang, Yukitoshi Kan-Ya, Masahiro Kanaguchi, Noriyuki Kawaguchi, Bong Gyu Kim, Hyo Ryoung Kim, Hyun Goo Kim, Jaeheon Kim, Jongsoo Kim, Kee Tae Kim, Mikyoung Kim, Hideyuki Kobayashi, Yusuke Kono, Tomoharu Kurayama, Changhoon Lee, Jung Won Lee, Sang Hyun Lee, Young Chol Minh, Naoko Matsumoto, Akiharu Nakagawa, Chung Sik Oh, Se Jin Oh, Sun Youp Park, Duk Gyoo Roh, Tetsuo Sasao, Katsunori M. Shibata, Min Gyu Song, Yoshiaki Tamura, Seog Oh Wi, Jae Hwan Yeom, Young Joo Yun

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

The Korean very-long-baseline interferometry (VLBI) network (KVN) and VLBI Exploration of Radio Astrometry (VERA) Array (KaVA) is the first international VLBI array dedicated to high-frequency (23-43GHz bands) observations in East Asia. Here, we report the first imaging observations of three bright active galactic nuclei (AGNs) known for their complex morphologies: 4C39.25, 3C273, and M87. This is one of the initial results of KaVA's early operation. Our KaVA images reveal extended outflows with complex substructures such as knots and limb brightening, in agreement with previous Very Long Baseline Array (VLBA) observations. Angular resolutions are better than 1.4 and 0.8 mas at 23 and 43GHz, respectively. KaVA achieves a high dynamic range of ∼1000, more than three times the value achieved by VERA. We conclude that KaVA is a powerful array with a great potential for the study of AGN outflows, at least comparable to the best existing radio interferometric arrays.

Original languageEnglish
Article number103
JournalPublications of the Astronomical Society of Japan
Volume66
Issue number6
DOIs
Publication statusPublished - 2013 Dec 18

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very long base interferometry
astrometry
very long baseline interferometry
active galactic nuclei
interferometry
radio
evaluation
limb brightening
outflow
Very Long Baseline Array (VLBA)
angular resolution
substructures
dynamic range
limb

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Niinuma, Kotaro ; Lee, Sang Sung ; Kino, Motoki ; Sohn, Bong Won ; Akiyama, Kazunori ; Zhao, Guang Yao ; Sawada-Satoh, Satoko ; Trippe, Sascha ; Hada, Kazuhiro ; Jung, Taehyun ; Hagiwara, Yoshiaki ; Dodson, Richard ; Koyama, Shoko ; Honma, Mareki ; Nagai, Hiroshi ; Chung, Aeree ; Doi, Akihiro ; Fujisawa, Kenta ; Han, Myoung Hee ; Kim, Joeng Sook ; Lee, Jeewon ; Lee, Jeong Ae ; Miyazaki, Atsushi ; Oyama, Tomoaki ; Sorai, Kazuo ; Wajima, Kiyoaki ; Bae, Jaehan ; Byun, Do Young ; Cho, Se Hyung ; Choi, Yoon Kyung ; Chung, Hyunsoo ; Chung, Moon Hee ; Han, Seog Tae ; Hirota, Tomoya ; Hwang, Jung Wook ; Je, Do Heung ; Jike, Takaaki ; Jung, Dong Kyu ; Jung, Jin Seung ; Kang, Ji Hyun ; Kang, Jiman ; Kang, Yong Woo ; Kan-Ya, Yukitoshi ; Kanaguchi, Masahiro ; Kawaguchi, Noriyuki ; Kim, Bong Gyu ; Kim, Hyo Ryoung ; Kim, Hyun Goo ; Kim, Jaeheon ; Kim, Jongsoo ; Kim, Kee Tae ; Kim, Mikyoung ; Kobayashi, Hideyuki ; Kono, Yusuke ; Kurayama, Tomoharu ; Lee, Changhoon ; Lee, Jung Won ; Lee, Sang Hyun ; Minh, Young Chol ; Matsumoto, Naoko ; Nakagawa, Akiharu ; Oh, Chung Sik ; Oh, Se Jin ; Park, Sun Youp ; Roh, Duk Gyoo ; Sasao, Tetsuo ; Shibata, Katsunori M. ; Song, Min Gyu ; Tamura, Yoshiaki ; Wi, Seog Oh ; Yeom, Jae Hwan ; Yun, Young Joo. / VLBI observations of bright AGN jets with the KVN and VERA Array (KaVA) : Evaluation of imaging capability. In: Publications of the Astronomical Society of Japan. 2013 ; Vol. 66, No. 6.
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abstract = "The Korean very-long-baseline interferometry (VLBI) network (KVN) and VLBI Exploration of Radio Astrometry (VERA) Array (KaVA) is the first international VLBI array dedicated to high-frequency (23-43GHz bands) observations in East Asia. Here, we report the first imaging observations of three bright active galactic nuclei (AGNs) known for their complex morphologies: 4C39.25, 3C273, and M87. This is one of the initial results of KaVA's early operation. Our KaVA images reveal extended outflows with complex substructures such as knots and limb brightening, in agreement with previous Very Long Baseline Array (VLBA) observations. Angular resolutions are better than 1.4 and 0.8 mas at 23 and 43GHz, respectively. KaVA achieves a high dynamic range of ∼1000, more than three times the value achieved by VERA. We conclude that KaVA is a powerful array with a great potential for the study of AGN outflows, at least comparable to the best existing radio interferometric arrays.",
author = "Kotaro Niinuma and Lee, {Sang Sung} and Motoki Kino and Sohn, {Bong Won} and Kazunori Akiyama and Zhao, {Guang Yao} and Satoko Sawada-Satoh and Sascha Trippe and Kazuhiro Hada and Taehyun Jung and Yoshiaki Hagiwara and Richard Dodson and Shoko Koyama and Mareki Honma and Hiroshi Nagai and Aeree Chung and Akihiro Doi and Kenta Fujisawa and Han, {Myoung Hee} and Kim, {Joeng Sook} and Jeewon Lee and Lee, {Jeong Ae} and Atsushi Miyazaki and Tomoaki Oyama and Kazuo Sorai and Kiyoaki Wajima and Jaehan Bae and Byun, {Do Young} and Cho, {Se Hyung} and Choi, {Yoon Kyung} and Hyunsoo Chung and Chung, {Moon Hee} and Han, {Seog Tae} and Tomoya Hirota and Hwang, {Jung Wook} and Je, {Do Heung} and Takaaki Jike and Jung, {Dong Kyu} and Jung, {Jin Seung} and Kang, {Ji Hyun} and Jiman Kang and Kang, {Yong Woo} and Yukitoshi Kan-Ya and Masahiro Kanaguchi and Noriyuki Kawaguchi and Kim, {Bong Gyu} and Kim, {Hyo Ryoung} and Kim, {Hyun Goo} and Jaeheon Kim and Jongsoo Kim and Kim, {Kee Tae} and Mikyoung Kim and Hideyuki Kobayashi and Yusuke Kono and Tomoharu Kurayama and Changhoon Lee and Lee, {Jung Won} and Lee, {Sang Hyun} and Minh, {Young Chol} and Naoko Matsumoto and Akiharu Nakagawa and Oh, {Chung Sik} and Oh, {Se Jin} and Park, {Sun Youp} and Roh, {Duk Gyoo} and Tetsuo Sasao and Shibata, {Katsunori M.} and Song, {Min Gyu} and Yoshiaki Tamura and Wi, {Seog Oh} and Yeom, {Jae Hwan} and Yun, {Young Joo}",
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Niinuma, K, Lee, SS, Kino, M, Sohn, BW, Akiyama, K, Zhao, GY, Sawada-Satoh, S, Trippe, S, Hada, K, Jung, T, Hagiwara, Y, Dodson, R, Koyama, S, Honma, M, Nagai, H, Chung, A, Doi, A, Fujisawa, K, Han, MH, Kim, JS, Lee, J, Lee, JA, Miyazaki, A, Oyama, T, Sorai, K, Wajima, K, Bae, J, Byun, DY, Cho, SH, Choi, YK, Chung, H, Chung, MH, Han, ST, Hirota, T, Hwang, JW, Je, DH, Jike, T, Jung, DK, Jung, JS, Kang, JH, Kang, J, Kang, YW, Kan-Ya, Y, Kanaguchi, M, Kawaguchi, N, Kim, BG, Kim, HR, Kim, HG, Kim, J, Kim, J, Kim, KT, Kim, M, Kobayashi, H, Kono, Y, Kurayama, T, Lee, C, Lee, JW, Lee, SH, Minh, YC, Matsumoto, N, Nakagawa, A, Oh, CS, Oh, SJ, Park, SY, Roh, DG, Sasao, T, Shibata, KM, Song, MG, Tamura, Y, Wi, SO, Yeom, JH & Yun, YJ 2013, 'VLBI observations of bright AGN jets with the KVN and VERA Array (KaVA): Evaluation of imaging capability', Publications of the Astronomical Society of Japan, vol. 66, no. 6, 103. https://doi.org/10.1093/pasj/psu104

VLBI observations of bright AGN jets with the KVN and VERA Array (KaVA) : Evaluation of imaging capability. / Niinuma, Kotaro; Lee, Sang Sung; Kino, Motoki; Sohn, Bong Won; Akiyama, Kazunori; Zhao, Guang Yao; Sawada-Satoh, Satoko; Trippe, Sascha; Hada, Kazuhiro; Jung, Taehyun; Hagiwara, Yoshiaki; Dodson, Richard; Koyama, Shoko; Honma, Mareki; Nagai, Hiroshi; Chung, Aeree; Doi, Akihiro; Fujisawa, Kenta; Han, Myoung Hee; Kim, Joeng Sook; Lee, Jeewon; Lee, Jeong Ae; Miyazaki, Atsushi; Oyama, Tomoaki; Sorai, Kazuo; Wajima, Kiyoaki; Bae, Jaehan; Byun, Do Young; Cho, Se Hyung; Choi, Yoon Kyung; Chung, Hyunsoo; Chung, Moon Hee; Han, Seog Tae; Hirota, Tomoya; Hwang, Jung Wook; Je, Do Heung; Jike, Takaaki; Jung, Dong Kyu; Jung, Jin Seung; Kang, Ji Hyun; Kang, Jiman; Kang, Yong Woo; Kan-Ya, Yukitoshi; Kanaguchi, Masahiro; Kawaguchi, Noriyuki; Kim, Bong Gyu; Kim, Hyo Ryoung; Kim, Hyun Goo; Kim, Jaeheon; Kim, Jongsoo; Kim, Kee Tae; Kim, Mikyoung; Kobayashi, Hideyuki; Kono, Yusuke; Kurayama, Tomoharu; Lee, Changhoon; Lee, Jung Won; Lee, Sang Hyun; Minh, Young Chol; Matsumoto, Naoko; Nakagawa, Akiharu; Oh, Chung Sik; Oh, Se Jin; Park, Sun Youp; Roh, Duk Gyoo; Sasao, Tetsuo; Shibata, Katsunori M.; Song, Min Gyu; Tamura, Yoshiaki; Wi, Seog Oh; Yeom, Jae Hwan; Yun, Young Joo.

In: Publications of the Astronomical Society of Japan, Vol. 66, No. 6, 103, 18.12.2013.

Research output: Contribution to journalArticle

TY - JOUR

T1 - VLBI observations of bright AGN jets with the KVN and VERA Array (KaVA)

T2 - Evaluation of imaging capability

AU - Niinuma, Kotaro

AU - Lee, Sang Sung

AU - Kino, Motoki

AU - Sohn, Bong Won

AU - Akiyama, Kazunori

AU - Zhao, Guang Yao

AU - Sawada-Satoh, Satoko

AU - Trippe, Sascha

AU - Hada, Kazuhiro

AU - Jung, Taehyun

AU - Hagiwara, Yoshiaki

AU - Dodson, Richard

AU - Koyama, Shoko

AU - Honma, Mareki

AU - Nagai, Hiroshi

AU - Chung, Aeree

AU - Doi, Akihiro

AU - Fujisawa, Kenta

AU - Han, Myoung Hee

AU - Kim, Joeng Sook

AU - Lee, Jeewon

AU - Lee, Jeong Ae

AU - Miyazaki, Atsushi

AU - Oyama, Tomoaki

AU - Sorai, Kazuo

AU - Wajima, Kiyoaki

AU - Bae, Jaehan

AU - Byun, Do Young

AU - Cho, Se Hyung

AU - Choi, Yoon Kyung

AU - Chung, Hyunsoo

AU - Chung, Moon Hee

AU - Han, Seog Tae

AU - Hirota, Tomoya

AU - Hwang, Jung Wook

AU - Je, Do Heung

AU - Jike, Takaaki

AU - Jung, Dong Kyu

AU - Jung, Jin Seung

AU - Kang, Ji Hyun

AU - Kang, Jiman

AU - Kang, Yong Woo

AU - Kan-Ya, Yukitoshi

AU - Kanaguchi, Masahiro

AU - Kawaguchi, Noriyuki

AU - Kim, Bong Gyu

AU - Kim, Hyo Ryoung

AU - Kim, Hyun Goo

AU - Kim, Jaeheon

AU - Kim, Jongsoo

AU - Kim, Kee Tae

AU - Kim, Mikyoung

AU - Kobayashi, Hideyuki

AU - Kono, Yusuke

AU - Kurayama, Tomoharu

AU - Lee, Changhoon

AU - Lee, Jung Won

AU - Lee, Sang Hyun

AU - Minh, Young Chol

AU - Matsumoto, Naoko

AU - Nakagawa, Akiharu

AU - Oh, Chung Sik

AU - Oh, Se Jin

AU - Park, Sun Youp

AU - Roh, Duk Gyoo

AU - Sasao, Tetsuo

AU - Shibata, Katsunori M.

AU - Song, Min Gyu

AU - Tamura, Yoshiaki

AU - Wi, Seog Oh

AU - Yeom, Jae Hwan

AU - Yun, Young Joo

PY - 2013/12/18

Y1 - 2013/12/18

N2 - The Korean very-long-baseline interferometry (VLBI) network (KVN) and VLBI Exploration of Radio Astrometry (VERA) Array (KaVA) is the first international VLBI array dedicated to high-frequency (23-43GHz bands) observations in East Asia. Here, we report the first imaging observations of three bright active galactic nuclei (AGNs) known for their complex morphologies: 4C39.25, 3C273, and M87. This is one of the initial results of KaVA's early operation. Our KaVA images reveal extended outflows with complex substructures such as knots and limb brightening, in agreement with previous Very Long Baseline Array (VLBA) observations. Angular resolutions are better than 1.4 and 0.8 mas at 23 and 43GHz, respectively. KaVA achieves a high dynamic range of ∼1000, more than three times the value achieved by VERA. We conclude that KaVA is a powerful array with a great potential for the study of AGN outflows, at least comparable to the best existing radio interferometric arrays.

AB - The Korean very-long-baseline interferometry (VLBI) network (KVN) and VLBI Exploration of Radio Astrometry (VERA) Array (KaVA) is the first international VLBI array dedicated to high-frequency (23-43GHz bands) observations in East Asia. Here, we report the first imaging observations of three bright active galactic nuclei (AGNs) known for their complex morphologies: 4C39.25, 3C273, and M87. This is one of the initial results of KaVA's early operation. Our KaVA images reveal extended outflows with complex substructures such as knots and limb brightening, in agreement with previous Very Long Baseline Array (VLBA) observations. Angular resolutions are better than 1.4 and 0.8 mas at 23 and 43GHz, respectively. KaVA achieves a high dynamic range of ∼1000, more than three times the value achieved by VERA. We conclude that KaVA is a powerful array with a great potential for the study of AGN outflows, at least comparable to the best existing radio interferometric arrays.

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U2 - 10.1093/pasj/psu104

DO - 10.1093/pasj/psu104

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JO - Publication of the Astronomical Society of Japan

JF - Publication of the Astronomical Society of Japan

SN - 0004-6264

IS - 6

M1 - 103

ER -