Jet kinematics of the quasar 4C+21.35 from observations with the KaVA very long baseline interferometry array
We present the jet kinematics of the flat spectrum radio quasar (FSRQ) 4C+21.35 using time-resolved KaVA very long baseline interferometry array radio maps obtained from 2014 September to 2016 July. During two out of three observing campaigns, observations were performed bi-weekly at 22 and 43 GHz q...
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| Veröffentlicht in: | Monthly notices of the Royal Astronomical Society 2019-06, Vol.486 (2), p.2412-2421 |
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| creator | Lee, Taeseok Trippe, Sascha Kino, Motoki Sohn, Bong Won Park, Jongho Oh, Junghwan Hada, Kazuhiro Niinuma, Kotaro Ro, Hyunwook Jung, Taehyun Zhao, Guang-Yao Lee, Sang-Sung Algaba, Juan-Carlos Akiyama, Kazunori Wajima, Kiyoaki Sawada-Satoh, Satoko Tazaki, Fumie Cho, Ilje Hodgson, Jeffrey Lee, Jeong Ae Hagiwara, Yoshiaki Honma, Mareki Koyama, Shoko An, Tao Cui, Yuzhu Yoo, Hyemin Kawaguchi, Noriyuki Roh, Duk-Gyoo Oh, Se-Jin Yeom, Jae-Hwan Jung, Dong-Kyu Oh, Chungsik Kim, Hyo-Ryoung Hwang, Ju-Yeon Byun, Do-Young Cho, Se-Hyung Kim, Hyun-Goo Kobayashi, Hideyuki Shibata, Katsunori M Shen, Zhiqiang Jiang, Wu Lee, Jee Won |
| description | We present the jet kinematics of the flat spectrum radio quasar (FSRQ) 4C+21.35 using time-resolved KaVA very long baseline interferometry array radio maps obtained from 2014 September to 2016 July. During two out of three observing campaigns, observations were performed bi-weekly at 22 and 43 GHz quasi-simultaneously. At 22 GHz, we identified three jet components near the core with apparent speeds up to (14.4 ± 2.1)c. The timing of the ejection of a new component detected in 2016 is consistent with a γ-ray flare in 2014 November. At 43 GHz, we found four inner jet ( |
| doi_str_mv | 10.1093/mnras/stz970 |
| format | Article |
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During two out of three observing campaigns, observations were performed bi-weekly at 22 and 43 GHz quasi-simultaneously. At 22 GHz, we identified three jet components near the core with apparent speeds up to (14.4 ± 2.1)c. The timing of the ejection of a new component detected in 2016 is consistent with a γ-ray flare in 2014 November. At 43 GHz, we found four inner jet (<3 mas) components with speeds from (3.5 ± 1.4)c to (6.8 ± 1.5)c. Jet component speeds tend to be higher with increasing distances from the core. We compared our data with archival Very Long Baseline Array (VLBA) data from the Boston University (BU) 43 GHz and the Monitoring Of Jets in Active galactic nuclei with VLBA Experiments (MOJAVE) 15.4 GHz monitoring programmes. Whereas MOJAVE data and our data are in good agreement, jet speeds obtained from the BU programme data in the same time period are about twice as high as the ones we obtain from the KaVA data. The discrepancy at 43 GHz indicates that radio arrays with different angular resolution identify and trace different jet features even when the data are obtained at the same frequency and at the same time. The flux densities of jet components decay exponentially, in agreement with a synchrotron cooling time-scale of ∼1 yr. Using known electron Lorentz factor values (∼9000), we estimate the magnetic field strength to be ∼1–3 $\mu$T. When adopting a jet viewing angle of 5°, the intrinsic jet speed is of order 0.99c.</description><identifier>ISSN: 0035-8711</identifier><identifier>EISSN: 1365-2966</identifier><identifier>DOI: 10.1093/mnras/stz970</identifier><language>eng</language><ispartof>Monthly notices of the Royal Astronomical Society, 2019-06, Vol.486 (2), p.2412-2421</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c235t-a6ddecded9b884b77e9243a6ee6477d39a2e94c209e6d5262f1f26ca46827df3</citedby><cites>FETCH-LOGICAL-c235t-a6ddecded9b884b77e9243a6ee6477d39a2e94c209e6d5262f1f26ca46827df3</cites><orcidid>0000-0001-6993-1696 ; 0000-0001-6094-9291 ; 0000-0003-4341-0029 ; 0000-0002-3723-3372</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,27901,27902</link.rule.ids></links><search><creatorcontrib>Lee, Taeseok</creatorcontrib><creatorcontrib>Trippe, Sascha</creatorcontrib><creatorcontrib>Kino, Motoki</creatorcontrib><creatorcontrib>Sohn, Bong Won</creatorcontrib><creatorcontrib>Park, Jongho</creatorcontrib><creatorcontrib>Oh, Junghwan</creatorcontrib><creatorcontrib>Hada, Kazuhiro</creatorcontrib><creatorcontrib>Niinuma, Kotaro</creatorcontrib><creatorcontrib>Ro, Hyunwook</creatorcontrib><creatorcontrib>Jung, Taehyun</creatorcontrib><creatorcontrib>Zhao, Guang-Yao</creatorcontrib><creatorcontrib>Lee, Sang-Sung</creatorcontrib><creatorcontrib>Algaba, Juan-Carlos</creatorcontrib><creatorcontrib>Akiyama, Kazunori</creatorcontrib><creatorcontrib>Wajima, Kiyoaki</creatorcontrib><creatorcontrib>Sawada-Satoh, Satoko</creatorcontrib><creatorcontrib>Tazaki, Fumie</creatorcontrib><creatorcontrib>Cho, Ilje</creatorcontrib><creatorcontrib>Hodgson, Jeffrey</creatorcontrib><creatorcontrib>Lee, Jeong Ae</creatorcontrib><creatorcontrib>Hagiwara, Yoshiaki</creatorcontrib><creatorcontrib>Honma, Mareki</creatorcontrib><creatorcontrib>Koyama, Shoko</creatorcontrib><creatorcontrib>An, Tao</creatorcontrib><creatorcontrib>Cui, Yuzhu</creatorcontrib><creatorcontrib>Yoo, Hyemin</creatorcontrib><creatorcontrib>Kawaguchi, Noriyuki</creatorcontrib><creatorcontrib>Roh, Duk-Gyoo</creatorcontrib><creatorcontrib>Oh, Se-Jin</creatorcontrib><creatorcontrib>Yeom, Jae-Hwan</creatorcontrib><creatorcontrib>Jung, Dong-Kyu</creatorcontrib><creatorcontrib>Oh, Chungsik</creatorcontrib><creatorcontrib>Kim, Hyo-Ryoung</creatorcontrib><creatorcontrib>Hwang, Ju-Yeon</creatorcontrib><creatorcontrib>Byun, Do-Young</creatorcontrib><creatorcontrib>Cho, Se-Hyung</creatorcontrib><creatorcontrib>Kim, Hyun-Goo</creatorcontrib><creatorcontrib>Kobayashi, Hideyuki</creatorcontrib><creatorcontrib>Shibata, Katsunori M</creatorcontrib><creatorcontrib>Shen, Zhiqiang</creatorcontrib><creatorcontrib>Jiang, Wu</creatorcontrib><creatorcontrib>Lee, Jee Won</creatorcontrib><title>Jet kinematics of the quasar 4C+21.35 from observations with the KaVA very long baseline interferometry array</title><title>Monthly notices of the Royal Astronomical Society</title><description>We present the jet kinematics of the flat spectrum radio quasar (FSRQ) 4C+21.35 using time-resolved KaVA very long baseline interferometry array radio maps obtained from 2014 September to 2016 July. During two out of three observing campaigns, observations were performed bi-weekly at 22 and 43 GHz quasi-simultaneously. At 22 GHz, we identified three jet components near the core with apparent speeds up to (14.4 ± 2.1)c. The timing of the ejection of a new component detected in 2016 is consistent with a γ-ray flare in 2014 November. At 43 GHz, we found four inner jet (<3 mas) components with speeds from (3.5 ± 1.4)c to (6.8 ± 1.5)c. Jet component speeds tend to be higher with increasing distances from the core. We compared our data with archival Very Long Baseline Array (VLBA) data from the Boston University (BU) 43 GHz and the Monitoring Of Jets in Active galactic nuclei with VLBA Experiments (MOJAVE) 15.4 GHz monitoring programmes. Whereas MOJAVE data and our data are in good agreement, jet speeds obtained from the BU programme data in the same time period are about twice as high as the ones we obtain from the KaVA data. The discrepancy at 43 GHz indicates that radio arrays with different angular resolution identify and trace different jet features even when the data are obtained at the same frequency and at the same time. The flux densities of jet components decay exponentially, in agreement with a synchrotron cooling time-scale of ∼1 yr. Using known electron Lorentz factor values (∼9000), we estimate the magnetic field strength to be ∼1–3 $\mu$T. When adopting a jet viewing angle of 5°, the intrinsic jet speed is of order 0.99c.</description><issn>0035-8711</issn><issn>1365-2966</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><recordid>eNotkMtOwzAURC0EEqWw4wO8h7R-xY6XVcS7EpuKbXQTX9NAk4BtisrXE1pWs5iZsziEXHI248zKedcHiPOYfqxhR2TCpc4zYbU-JhPGZJ4VhvNTchbjG2NMSaEnpHvERN_bHjtIbRPp4GlaI_38ggiBqvJK8JnMqQ9DR4c6YtiOu6GP9LtN6_30CV4WdIthRzdD_0priLgZebTtEwaP4xHTWEIIsDsnJx42ES_-c0pWtzer8j5bPt89lItl1giZpwy0c9g4dLYuClUbg1YoCRpRK2OctCDQqkYwi9rlQgvPvdANKF0I47yckusDtglDjAF99RHaDsKu4qz6M1XtTVUHU_IXEpRfvQ</recordid><startdate>20190601</startdate><enddate>20190601</enddate><creator>Lee, Taeseok</creator><creator>Trippe, Sascha</creator><creator>Kino, Motoki</creator><creator>Sohn, Bong Won</creator><creator>Park, Jongho</creator><creator>Oh, Junghwan</creator><creator>Hada, Kazuhiro</creator><creator>Niinuma, Kotaro</creator><creator>Ro, Hyunwook</creator><creator>Jung, Taehyun</creator><creator>Zhao, Guang-Yao</creator><creator>Lee, Sang-Sung</creator><creator>Algaba, Juan-Carlos</creator><creator>Akiyama, Kazunori</creator><creator>Wajima, Kiyoaki</creator><creator>Sawada-Satoh, Satoko</creator><creator>Tazaki, Fumie</creator><creator>Cho, Ilje</creator><creator>Hodgson, Jeffrey</creator><creator>Lee, Jeong Ae</creator><creator>Hagiwara, Yoshiaki</creator><creator>Honma, Mareki</creator><creator>Koyama, Shoko</creator><creator>An, Tao</creator><creator>Cui, Yuzhu</creator><creator>Yoo, Hyemin</creator><creator>Kawaguchi, Noriyuki</creator><creator>Roh, Duk-Gyoo</creator><creator>Oh, Se-Jin</creator><creator>Yeom, Jae-Hwan</creator><creator>Jung, Dong-Kyu</creator><creator>Oh, Chungsik</creator><creator>Kim, Hyo-Ryoung</creator><creator>Hwang, Ju-Yeon</creator><creator>Byun, Do-Young</creator><creator>Cho, Se-Hyung</creator><creator>Kim, Hyun-Goo</creator><creator>Kobayashi, Hideyuki</creator><creator>Shibata, Katsunori M</creator><creator>Shen, Zhiqiang</creator><creator>Jiang, Wu</creator><creator>Lee, Jee Won</creator><scope>AAYXX</scope><scope>CITATION</scope><orcidid>https://orcid.org/0000-0001-6993-1696</orcidid><orcidid>https://orcid.org/0000-0001-6094-9291</orcidid><orcidid>https://orcid.org/0000-0003-4341-0029</orcidid><orcidid>https://orcid.org/0000-0002-3723-3372</orcidid></search><sort><creationdate>20190601</creationdate><title>Jet kinematics of the quasar 4C+21.35 from observations with the KaVA very long baseline interferometry array</title><author>Lee, Taeseok ; Trippe, Sascha ; Kino, Motoki ; Sohn, Bong Won ; Park, Jongho ; Oh, Junghwan ; Hada, Kazuhiro ; Niinuma, Kotaro ; Ro, Hyunwook ; Jung, Taehyun ; Zhao, Guang-Yao ; Lee, Sang-Sung ; Algaba, Juan-Carlos ; Akiyama, Kazunori ; Wajima, Kiyoaki ; Sawada-Satoh, Satoko ; Tazaki, Fumie ; Cho, Ilje ; Hodgson, Jeffrey ; Lee, Jeong Ae ; Hagiwara, Yoshiaki ; Honma, Mareki ; Koyama, Shoko ; An, Tao ; Cui, Yuzhu ; Yoo, Hyemin ; Kawaguchi, Noriyuki ; Roh, Duk-Gyoo ; Oh, Se-Jin ; Yeom, Jae-Hwan ; Jung, Dong-Kyu ; Oh, Chungsik ; Kim, Hyo-Ryoung ; Hwang, Ju-Yeon ; Byun, Do-Young ; Cho, Se-Hyung ; Kim, Hyun-Goo ; Kobayashi, Hideyuki ; Shibata, Katsunori M ; Shen, Zhiqiang ; Jiang, Wu ; Lee, Jee Won</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c235t-a6ddecded9b884b77e9243a6ee6477d39a2e94c209e6d5262f1f26ca46827df3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Lee, Taeseok</creatorcontrib><creatorcontrib>Trippe, Sascha</creatorcontrib><creatorcontrib>Kino, Motoki</creatorcontrib><creatorcontrib>Sohn, Bong Won</creatorcontrib><creatorcontrib>Park, Jongho</creatorcontrib><creatorcontrib>Oh, Junghwan</creatorcontrib><creatorcontrib>Hada, Kazuhiro</creatorcontrib><creatorcontrib>Niinuma, Kotaro</creatorcontrib><creatorcontrib>Ro, Hyunwook</creatorcontrib><creatorcontrib>Jung, Taehyun</creatorcontrib><creatorcontrib>Zhao, Guang-Yao</creatorcontrib><creatorcontrib>Lee, Sang-Sung</creatorcontrib><creatorcontrib>Algaba, Juan-Carlos</creatorcontrib><creatorcontrib>Akiyama, Kazunori</creatorcontrib><creatorcontrib>Wajima, Kiyoaki</creatorcontrib><creatorcontrib>Sawada-Satoh, Satoko</creatorcontrib><creatorcontrib>Tazaki, Fumie</creatorcontrib><creatorcontrib>Cho, Ilje</creatorcontrib><creatorcontrib>Hodgson, Jeffrey</creatorcontrib><creatorcontrib>Lee, Jeong Ae</creatorcontrib><creatorcontrib>Hagiwara, Yoshiaki</creatorcontrib><creatorcontrib>Honma, Mareki</creatorcontrib><creatorcontrib>Koyama, Shoko</creatorcontrib><creatorcontrib>An, Tao</creatorcontrib><creatorcontrib>Cui, Yuzhu</creatorcontrib><creatorcontrib>Yoo, Hyemin</creatorcontrib><creatorcontrib>Kawaguchi, Noriyuki</creatorcontrib><creatorcontrib>Roh, Duk-Gyoo</creatorcontrib><creatorcontrib>Oh, Se-Jin</creatorcontrib><creatorcontrib>Yeom, Jae-Hwan</creatorcontrib><creatorcontrib>Jung, Dong-Kyu</creatorcontrib><creatorcontrib>Oh, Chungsik</creatorcontrib><creatorcontrib>Kim, Hyo-Ryoung</creatorcontrib><creatorcontrib>Hwang, Ju-Yeon</creatorcontrib><creatorcontrib>Byun, Do-Young</creatorcontrib><creatorcontrib>Cho, Se-Hyung</creatorcontrib><creatorcontrib>Kim, Hyun-Goo</creatorcontrib><creatorcontrib>Kobayashi, Hideyuki</creatorcontrib><creatorcontrib>Shibata, Katsunori M</creatorcontrib><creatorcontrib>Shen, Zhiqiang</creatorcontrib><creatorcontrib>Jiang, Wu</creatorcontrib><creatorcontrib>Lee, Jee Won</creatorcontrib><collection>CrossRef</collection><jtitle>Monthly notices of the Royal Astronomical Society</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Lee, Taeseok</au><au>Trippe, Sascha</au><au>Kino, Motoki</au><au>Sohn, Bong Won</au><au>Park, Jongho</au><au>Oh, Junghwan</au><au>Hada, Kazuhiro</au><au>Niinuma, Kotaro</au><au>Ro, Hyunwook</au><au>Jung, Taehyun</au><au>Zhao, Guang-Yao</au><au>Lee, Sang-Sung</au><au>Algaba, Juan-Carlos</au><au>Akiyama, Kazunori</au><au>Wajima, Kiyoaki</au><au>Sawada-Satoh, Satoko</au><au>Tazaki, Fumie</au><au>Cho, Ilje</au><au>Hodgson, Jeffrey</au><au>Lee, Jeong Ae</au><au>Hagiwara, Yoshiaki</au><au>Honma, Mareki</au><au>Koyama, Shoko</au><au>An, Tao</au><au>Cui, Yuzhu</au><au>Yoo, Hyemin</au><au>Kawaguchi, Noriyuki</au><au>Roh, Duk-Gyoo</au><au>Oh, Se-Jin</au><au>Yeom, Jae-Hwan</au><au>Jung, Dong-Kyu</au><au>Oh, Chungsik</au><au>Kim, Hyo-Ryoung</au><au>Hwang, Ju-Yeon</au><au>Byun, Do-Young</au><au>Cho, Se-Hyung</au><au>Kim, Hyun-Goo</au><au>Kobayashi, Hideyuki</au><au>Shibata, Katsunori M</au><au>Shen, Zhiqiang</au><au>Jiang, Wu</au><au>Lee, Jee Won</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Jet kinematics of the quasar 4C+21.35 from observations with the KaVA very long baseline interferometry array</atitle><jtitle>Monthly notices of the Royal Astronomical Society</jtitle><date>2019-06-01</date><risdate>2019</risdate><volume>486</volume><issue>2</issue><spage>2412</spage><epage>2421</epage><pages>2412-2421</pages><issn>0035-8711</issn><eissn>1365-2966</eissn><abstract>We present the jet kinematics of the flat spectrum radio quasar (FSRQ) 4C+21.35 using time-resolved KaVA very long baseline interferometry array radio maps obtained from 2014 September to 2016 July. During two out of three observing campaigns, observations were performed bi-weekly at 22 and 43 GHz quasi-simultaneously. At 22 GHz, we identified three jet components near the core with apparent speeds up to (14.4 ± 2.1)c. The timing of the ejection of a new component detected in 2016 is consistent with a γ-ray flare in 2014 November. At 43 GHz, we found four inner jet (<3 mas) components with speeds from (3.5 ± 1.4)c to (6.8 ± 1.5)c. Jet component speeds tend to be higher with increasing distances from the core. We compared our data with archival Very Long Baseline Array (VLBA) data from the Boston University (BU) 43 GHz and the Monitoring Of Jets in Active galactic nuclei with VLBA Experiments (MOJAVE) 15.4 GHz monitoring programmes. Whereas MOJAVE data and our data are in good agreement, jet speeds obtained from the BU programme data in the same time period are about twice as high as the ones we obtain from the KaVA data. The discrepancy at 43 GHz indicates that radio arrays with different angular resolution identify and trace different jet features even when the data are obtained at the same frequency and at the same time. The flux densities of jet components decay exponentially, in agreement with a synchrotron cooling time-scale of ∼1 yr. Using known electron Lorentz factor values (∼9000), we estimate the magnetic field strength to be ∼1–3 $\mu$T. When adopting a jet viewing angle of 5°, the intrinsic jet speed is of order 0.99c.</abstract><doi>10.1093/mnras/stz970</doi><tpages>10</tpages><orcidid>https://orcid.org/0000-0001-6993-1696</orcidid><orcidid>https://orcid.org/0000-0001-6094-9291</orcidid><orcidid>https://orcid.org/0000-0003-4341-0029</orcidid><orcidid>https://orcid.org/0000-0002-3723-3372</orcidid></addata></record> |
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| ispartof | Monthly notices of the Royal Astronomical Society, 2019-06, Vol.486 (2), p.2412-2421 |
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| source | Oxford Journals Open Access Collection |
| title | Jet kinematics of the quasar 4C+21.35 from observations with the KaVA very long baseline interferometry array |
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