KMS of Xinjiang Astronomical Observatory, CAS
| Spectral analysis of a parsec-scale jet in M 87: Observational constraint on the magnetic field strengths in the jet | |
Ro, Hyunwook1,2; Kino, Motoki3,4; Sohn, Bong Won1,2,5; Hada, Kazuhiro6,7; Park, Jongho2,8,9; Nakamura, Masanori8,10; Cui, Yuzhu11,12; Yi, Kunwoo9; Chung, Aeree1; Hodgson, Jeffrey13; Kawashima, Tomohisa14; An, Tao15; Trippe, Sascha9,16; Algaba, Juan-Carlos17; Kim, Jae-Young2,18,19; Sawada-Satoh, Satoko20,21; Wajima, Kiyoaki2,5; Shen, Zhiqiang15,22; Cheng, Xiaopeng2; Cho, Ilje2,5,23; Jiang, Wu15,22; Jung, Taehyun2,5; Lee, Jee-Won2; Niinuma, Kotaro20,24; Oh, Junghwan2,13,25; Tazaki, Fumie6,26; Zhao, Guang-Yao2,23; Akiyama, Kazunori3,27,28; Honma, Mareki6,7; Lee, Jeong Ae2; Lu, Rusen15,19,22; Zhang, Yingkang15; Asada, Keiichi8; Cui, Lang22,29 ; Hagiwara, Yoshiaki30; Hirota, Tomoya3; Kawaguchi, Noriyuki3; Koyama, Shoko8,31; Lee, Sang-Sung2,5; Oh, Se-Jin2; Sugiyama, Koichiro32; Takamura, Mieko6,33; Wang, Xuezheng15; Hwang, Ju-Yeon2; Jung, Dong-Kyu2; Kim, Hyo-Ryoung2; Kim, Jeong-Sook2,34,35; Kobayashi, Hideyuki6,7; Oh, Chung-Sik2; Oyama, Tomoaki6; Roh, Duk-Gyoo2; Yeom, Jae-Hwan2
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| 2023-05-24 | |
| Source Publication | ASTRONOMY & ASTROPHYSICS
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| ISSN | 0004-6361 |
| Volume | 673Pages:A159 |
| Contribution Rank | 29 |
| Abstract | Context. Because of its proximity and the large size of its black hole, M 87 is one of the best targets for studying the launching mechanism of active galactic nucleus jets. Currently, magnetic fields are considered to be an essential factor in the launching and accelerating of the jet. However, current observational estimates of the magnetic field strength of the M 87 jet are limited to the innermost part of the jet (less than or similar to 100 r(s)) or to HST-1 (similar to 10(5) r(s)). No attempt has yet been made to measure the magnetic field strength in between. Aims. We aim to infer the magnetic field strength of the M 87 jet out to a distance of several thousand r(s) by tracking the distance-dependent changes in the synchrotron spectrum of the jet from high-resolution very long baseline interferometry observations. Methods. In order to obtain high-quality spectral index maps, quasi-simultaneous observations at 22 and 43 GHz were conducted using the KVN and VERA Array (KaVA) and the Very Long Baseline Array (VLBA). We compared the spectral index distributions obtained from the observations with a model and placed limits on the magnetic field strengths as a function of distance. Results. The overall spectral morphology is broadly consistent over the course of these observations. The observed synchrotron spectrum rapidly steepens from alpha(22 - 43 GHz) similar to -0.7 at similar to 2 mas to alpha(22 - 43 GHz) similar to -2.5 at similar to 6 mas. In the KaVA observations, the spectral index remains unchanged until similar to 10 mas, but this trend is unclear in the VLBA observations. A spectral index model in which nonthermal electron injections inside the jet decrease with distance can adequately reproduce the observed trend. This suggests the magnetic field strength of the jet at a distance of 2-10 mas (similar to 900 r(s) - similar to 4500 r(s) in the deprojected distance) has a range of B = (0.3-1.0 G)(z/2mas)(-0.73). Extrapolating to the Event Horizon Telescope scale yields consistent results, suggesting that the majority of the magnetic flux of the jet near the black hole is preserved out to similar to 4500 r(s) without significant dissipation. |
| Keyword | galaxies: active galaxies: individual: M 87 galaxies: jets radio continuum: galaxies relativistic processes techniques: interferometric |
| DOI | 10.1051/0004-6361/202142988 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | ACTIVE GALACTIC NUCLEI ; BLACK-HOLE MASS ; GAMMA-RAY FLARE ; M87 JET ; VLBI OBSERVATIONS ; SCHWARZSCHILD RADII ; CORE-SHIFT ; RELATIVISTIC JETS ; DYNAMICAL MODELS ; FREQUENCY VLBI |
| Funding Project | Korea Astronomy and Space Science Institute ; National Astronomical Observatory of Japan ; Korea Astronomy and Space Science Institute under the RD program ; Ministry of Science ; KASI-Yonsei DRC program of the Korea Research Council of Fundamental Science and Technology ; National Research Foundation of Korea (NRF) - Ministry of Science and ICT (MSIT) of Korea ; National Research Foundation of Korea (NRF) ; Korean National Research Foundation (NRF) via Global Ph.D. Fellowship ; EACOA Fellowship ; Academia Sinica Institute of Astronomy and Astrophysics ; East Asia Core Observatories Association ; National Astronomical Observatory of Japan ; Center for Astronomical Mega-Science ; Chinese Academy of Sciences ; Korea Astronomy and Space Science Institute ; Spanish Ministerio de Economia y Competitividad ; Mitsubishi Foundation ; JSPS/MEXT KAKENHI[DRC-12-2-KASI] ; JSPS KAKENHI[NRF-2020K1A3A1A78114060] ; National Research Foundation (NRF) of Korea[2022R1A2C100298211] ; National Research Foundation (NRF) of Korea[2022R1A6A1A03053472] ; Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education[2014H1A2A1018695] ; Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education[2015H1A2A1033752] ; Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education ; National Research Foundation of Korea (NRF) - Korea government (MIST) ; China Postdoctoral Science Foundation ; Key Program of the National Natural Science Foundation of China ; Key Research Program of Frontier Sciences, CAS ; Shanghai Pilot Program for Basic Research - Chinese Academy of Sciences, Shanghai Branch ; Max Planck Partner Group of the MPG and the CAS ; Major Program of the National Natural Science Foundation of China[PID2019-108995GB-C21] ; [201911019] ; [18K03656] ; [18H03721] ; [19H01943] ; [18KK0090] ; [21H01137] ; [21H04488] ; [21K03628] ; [2022R1F1A1075115] ; [2022R1C1C1005255] ; [NRF-2021R1A6A3A01086420] ; [2016R1A5A1013277] ; [2020R1A2C1007219] ; [2020R1A2C2009003] ; [2022M712084] ; [11933007] ; [ZDBS-LY-SLH011] ; [QYZDJ-SSWSLH057] ; [JCYJ-SHFY-2022-013] ; [11590780] ; [11590784] ; National Research Foundation of Korea[2022R1A6A1A03053472] |
| WOS Research Area | Astronomy & Astrophysics |
| WOS Subject | Astronomy & Astrophysics |
| WOS ID | WOS:001004184500003 |
| Publisher | EDP SCIENCES S A |
| Funding Organization | Korea Astronomy and Space Science Institute ; National Astronomical Observatory of Japan ; Korea Astronomy and Space Science Institute under the RD program ; Ministry of Science ; KASI-Yonsei DRC program of the Korea Research Council of Fundamental Science and Technology ; National Research Foundation of Korea (NRF) - Ministry of Science and ICT (MSIT) of Korea ; National Research Foundation of Korea (NRF) ; Korean National Research Foundation (NRF) via Global Ph.D. Fellowship ; EACOA Fellowship ; Academia Sinica Institute of Astronomy and Astrophysics ; East Asia Core Observatories Association ; National Astronomical Observatory of Japan ; Center for Astronomical Mega-Science ; Chinese Academy of Sciences ; Korea Astronomy and Space Science Institute ; Spanish Ministerio de Economia y Competitividad ; Mitsubishi Foundation ; JSPS/MEXT KAKENHI ; JSPS KAKENHI ; National Research Foundation (NRF) of Korea ; Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education ; Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education ; National Research Foundation of Korea (NRF) - Korea government (MIST) ; China Postdoctoral Science Foundation ; Key Program of the National Natural Science Foundation of China ; Key Research Program of Frontier Sciences, CAS ; Shanghai Pilot Program for Basic Research - Chinese Academy of Sciences, Shanghai Branch ; Max Planck Partner Group of the MPG and the CAS ; Major Program of the National Natural Science Foundation of China ; National Research Foundation of Korea |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/5305 |
| Collection | 中国科学院新疆天文台 |
| Corresponding Author | Ro, Hyunwook |
| Affiliation | 1.Yonsei Univ, Dept Astron, Yonsei Ro 50, Seoul 03722, South Korea 2.Korea Astron & Space Sci Inst, Daedeokdae Ro 776, Daejeon 34055, South Korea 3.Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan 4.Kogakuin Univ Technol & Engn, Acad Support Ctr, 2665-1 Nakano, Hachioji, Tokyo 1920015, Japan 5.Univ Sci & Technol, Gajeong Ro 217, Daejeon 34113, South Korea 6.Natl Astron Observ Japan, Mizusawa VLBI Observ, 2-12 Hoshigaoka, Oshu, Iwate 0230861, Japan 7.Grad Univ Adv Studies SOKENDAI, Dept Astron Sci, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan 8.Acad Sinica, Inst Astron & Astrophys, 11F Astron Math Bldg,AS-NTU 1,Sect 4 Roosevelt Rd, Taipei 10617, Taiwan 9.Seoul Natl Univ, Dept Phys & Astron, 1 Gwanak Ro, Seoul 08826, South Korea 10.Natl Inst Technol, Hachinohe Coll, Dept Gen Sci & Educ, 16-1 Tamonoki, Hachinohe, Aomori 0391192, Japan 11.Zhejiang Lab, Res Ctr Intelligent Comp Platforms, Hangzhou 311100, Peoples R China 12.Shanghai Jiao Tong Univ, Tsung Dao Lee Inst, Shanghai 201210, Peoples R China 13.Sejong Univ, Dept Phys & Astron, 209 Neungdong Ro, Seoul 05006, South Korea 14.Univ Tokyo, Inst Cosm Ray Res, 5-1-5 Kashiwanoha, Kashiwa, Chiba 2778582, Japan 15.Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China 16.Seoul Natl Univ, SNU Astron Res Ctr SNUARC, 1 Gwanak Ro, Seoul 08826, South Korea 17.Univ Malaya, Fac Sci, Dept Phys, Kuala Lumpur 50603, Malaysia 18.Kyungpook Natl Univ, Dept Astron & Atmospher Sci, Daegu 702701, South Korea 19.Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany 20.Osaka Metropolitan Univ, Grad Sch Sci, Osaka 5998531, Japan 21.Yamaguchi Univ, Res Inst Time Studies, Yoshida 1677-1, Yamaguchi, Yamaguchi 7538511, Japan 22.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Peoples R China 23.CSIC, Inst Astrofis Andalucia, Glorieta Astron S-N, Granada 18008, Spain 24.Yamaguchi Univ, Grad Sch Sci & Technol Innovat, 1677-1 Yoshida, Yamaguchi, Yamaguchi 7538511, Japan 25.Joint Inst VLBI ERIC, NL-7991 PD Dwingeloo, Netherlands 26.Tokyo Electron Technol Solut Ltd, Iwate 0231101, Japan 27.MIT, Haystack Observ, 99 Millstone Rd, Westford, MA 01886 USA 28.Harvard Univ, Black Hole Initiat, 20 Garden St, Cambridge, MA 02138 USA 29.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China 30.Toyo Univ, 5-28-20 Hakusan,Bunkyo Ku, Tokyo 1128606, Japan 31.Niigata Univ, 8050 Ikarashi 2 No Cho,Nishi Ku, Niigata 9502181, Japan 32.Natl Astron Res Inst Thailand, Publ Org, 260 Moo 4 T Donkaew A Maerim, Chiangmai 50180, Thailand 33.Univ Tokyo, Dept Astron, 7-3-1 Hongo, Tokyo 1130033, Japan 34.UNIST, Dept Phys, Ulsan 44919, South Korea 35.Chungbuk Natl Univ, Basic Sci Res Inst, Chungdae Ro 1, Cheongju 28644, South Korea |
| Recommended Citation GB/T 7714 | Ro, Hyunwook,Kino, Motoki,Sohn, Bong Won,et al. Spectral analysis of a parsec-scale jet in M 87: Observational constraint on the magnetic field strengths in the jet[J]. ASTRONOMY & ASTROPHYSICS,2023,673:A159. |
| APA | Ro, Hyunwook.,Kino, Motoki.,Sohn, Bong Won.,Hada, Kazuhiro.,Park, Jongho.,...&Yeom, Jae-Hwan.(2023).Spectral analysis of a parsec-scale jet in M 87: Observational constraint on the magnetic field strengths in the jet.ASTRONOMY & ASTROPHYSICS,673,A159. |
| MLA | Ro, Hyunwook,et al."Spectral analysis of a parsec-scale jet in M 87: Observational constraint on the magnetic field strengths in the jet".ASTRONOMY & ASTROPHYSICS 673(2023):A159. |
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| Ro-2023-Spectral ana（8240KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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