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 Kim; Jeewon 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

doi:10.1093/pasj/psu104

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 Kim

Jeewon 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

^*Corresponding author for this work

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

45 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 language	English
Article number	103
Journal	Publications of the Astronomical Society of Japan
Volume	66
Issue number	6
DOIs	https://doi.org/10.1093/pasj/psu104
Publication status	Published - Dec 2014

Keywords

Galaxies: active
Galaxies: jets
Radio continuum: galaxies
Techniques: interferometric

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1093/pasj/psu104

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Niinuma, K., Lee, S.-S., Kino, M., Sohn, B. W., Akiyama, K., Zhao, G.-Y., 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, M.-H., ... Kim, J. (2014). VLBI observations of bright AGN jets with the KVN and VERA Array (KaVA): Evaluation of imaging capability. Publications of the Astronomical Society of Japan, 66(6), Article 103. https://doi.org/10.1093/pasj/psu104

@article{cc5d96d9f8154fc7a9efa2f60c231e96,

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

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.",

keywords = "Galaxies: active, Galaxies: jets, Radio continuum: galaxies, Techniques: interferometric",

author = "Kotaro Niinuma and Sang-Sung Lee and Motoki Kino and Sohn, \{Bong Won\} and Kazunori Akiyama and Guang-Yao Zhao 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 Myoung-Hee Han and Joeng-Sook Kim and Jeewon Lee and Lee, \{Jeong Ae\} and Atsushi Miyazaki and Tomoaki Oyama and Kazuo Sorai and Kiyoaki Wajima and Jaehan Bae and Do-Young Byun and Se-Hyung Cho and Choi, \{Yoon Kyung\} and Hyunsoo Chung and Moon-Hee Chung and Seog-Tae Han and Tomoya Hirota and Jung-Wook Hwang and Do-Heung Je and Takaaki Jike and Dong-Kyu Jung and Jin-Seung Jung and Ji-Hyun Kang and Jiman Kang and Yong-Woo Kang and Yukitoshi Kan-Ya and Masahiro Kanaguchi and Noriyuki Kawaguchi and Kim, \{Bong Gyu\} and Kim, \{Hyo Ryoung\} and Hyun-Goo Kim and Jaeheon Kim and Jongsoo Kim",

year = "2014",

month = dec,

doi = "10.1093/pasj/psu104",

language = "English",

volume = "66",

journal = "Publications of the Astronomical Society of Japan",

issn = "0004-6264",

publisher = "Oxford University Press",

number = "6",

}

Niinuma, K, Lee, S-S, Kino, M, Sohn, BW, Akiyama, K, Zhao, G-Y, 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, M-H, Kim, J-S, Lee, J, Lee, JA, Miyazaki, A, Oyama, T, Sorai, K, Wajima, K, Bae, J, Byun, D-Y, Cho, S-H, Choi, YK, Chung, H, Chung, M-H, Han, S-T, Hirota, T, Hwang, J-W, Je, D-H, Jike, T, Jung, D-K, Jung, J-S, Kang, J-H, Kang, J, Kang, Y-W, Kan-Ya, Y, Kanaguchi, M, Kawaguchi, N, Kim, BG, Kim, HR, Kim, H-G, Kim, J & Kim, J 2014, '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

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

PY - 2014/12

Y1 - 2014/12

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.

KW - Galaxies: active

KW - Galaxies: jets

KW - Radio continuum: galaxies

KW - Techniques: interferometric

UR - https://www.scopus.com/pages/publications/84922571107

U2 - 10.1093/pasj/psu104

DO - 10.1093/pasj/psu104

M3 - Article

AN - SCOPUS:84922571107

SN - 0004-6264

VL - 66

JO - Publications of the Astronomical Society of Japan

JF - Publications of the Astronomical Society of Japan

IS - 6

M1 - 103

ER -

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

Abstract

Keywords

ASJC Scopus subject areas

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