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Magnetic field structures of spiral galaxies studied by polarization observations with single dish telescope

Research Project

Project/Area Number 21K03618
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 16010:Astronomy-related
Research InstitutionKagoshima University

Principal Investigator

Nakanishi Hiroyuki  鹿児島大学, 理工学域理学系, 准教授 (90419846)

Co-Investigator(Kenkyū-buntansha) 小林 秀行  国立天文台, 水沢VLBI観測所, 特任教授 (20211906)
藤澤 健太  山口大学, 時間学研究所, 教授 (70311181)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2023: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords銀河 / 磁場 / 偏波観測 / 相互相関 / デジタル回路 / FPGA / 電波観測 / 電波 / デジタル / 干渉計 / 偏波
Outline of Research at the Start

山口大学で運用する電波望遠鏡に偏波観測モードを実装するため、FPGAボードを用いたデジタル相互相関器を開発する。実験室での動作試験および評価を行った後、山口の電波望遠鏡に搬入し、試験観測ののち、較正用データを取得し、偏波観測モードによる近傍銀河の本観測を実施する。アーカイブで入手した偏波データと単一鏡偏波観測データを用いてミッシングフラックスのないシンクロトロン放射の偏波マップを得る。新たに開発した磁場ベクトルマップ作成法を適用し、銀河の大局的磁場構造のモード数を調べ、可視光観測から判定できる渦状腕数との関係を調べる。

Outline of Final Research Achievements

We developed a digital cross-correlation spectrometer using an FPGA board called ROACH2 (Reconfigurable Open Architecture Computing Hardware 2). The instrument was brought to the KDDI Yamaguchi Satellite Communication Station for test observations four times during the three years from 2021, and the cross-correlation spectra were successfully obtained.
In addition, we analyzed C- and X-band data of the spiral galaxy NGC 4254 obtained by JVLA to obtain a polarization map. We applied our originally developed "magnetic vector reconstruction method" and succeeded in creating a magnetic field vector map.

Academic Significance and Societal Importance of the Research Achievements

FPGAボード用いてデジタル相互相関分光計を開発し、KDDI 山口衛星通信所のアンテナでリアルタイムの相互相関スペクトルが得られるようになった。これは本研究で主眼においた銀河磁場の研究以外でも、様々な偏波観測をはじめ、干渉計観測に応用できるため、さらなる学術的発展につながる点で意義は大きいと考える。
また、新たに銀河の磁場ベクトルマップを作成することができ、我々が独自に考案した「磁場ベクトルマップ作成法」が銀河磁場の構造研究に極めて強力なツールとなることが示された。銀河の大局的磁場構造の起源を解明する上で、重要な手がかりが得られた点で学術的意義は大きいと考える。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (38 results)

All 2024 2023 2022 2021

All Journal Article (26 results) (of which Int'l Joint Research: 20 results,  Peer Reviewed: 24 results,  Open Access: 18 results) Presentation (12 results) (of which Int'l Joint Research: 4 results)

  • [Journal Article] Filamentary Network and Magnetic Field Structures Revealed with BISTRO in the High-mass Star-forming Region NGC 2264: Global Properties and Local Magnetogravitational Configurations2024

    • Author(s)
      Wang Jia-Wei, Nakanishi Hiroyuki, et al.
    • Journal Title

      The Astrophysical Journal

      Volume: 962 Issue: 2 Pages: 136-136

    • DOI

      10.3847/1538-4357/ad165b

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Detection of Extragalactic Anomalous Microwave Emission in NGC 2903 Using KVN Single-dish Observations2024

    • Author(s)
      Poojon Panomporn、Chung Aeree、Hoang Thiem、Baek Junhyun、Nakanishi Hiroyuki、Hirota Tomoya、Tsai Chao-Wei
    • Journal Title

      The Astrophysical Journal

      Volume: 963 Issue: 2 Pages: 88-88

    • DOI

      10.3847/1538-4357/ad1bc8

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] First BISTRO Observations of the Dark Cloud Taurus L1495A-B10: The Role of the Magnetic Field in the Earliest Stages of Low-mass Star Formation2023

    • Author(s)
      Ward-Thompson Derek、Karoly Janik、Pattle Kate、Whitworth Anthony、Kirk Jason、Berry David、Bastien Pierre、Ching Tao-Chung、Coud? Simon、Hwang Jihye、Kwon Woojin、Soam Archana、Wang Jia-Wei、Hasegawa Tetsuo、Lai Shih-Ping、Qiu Keping、Arzoumanian Doris、Doi Yasuo、et al.
    • Journal Title

      The Astrophysical Journal

      Volume: 946 Issue: 2 Pages: 62-62

    • DOI

      10.3847/1538-4357/acbea4

    • Related Report
      2023 Annual Research Report 2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] The JCMT BISTRO Survey: Studying the Complex Magnetic Field of L432023

    • Author(s)
      Karoly Janik, Nakanishi Hiroyuki, et al.
    • Journal Title

      The Astrophysical Journal

      Volume: 952 Issue: 1 Pages: 29-29

    • DOI

      10.3847/1538-4357/acd6f2

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] 鹿児島大学における高校生向け先取り履修科目開講の試み -高大接続教育の新たな形-2023

    • Author(s)
      中西裕之,岡村浩昭,松本詔,秦重史,加藤太一郎,九町健一,小林励司
    • Journal Title

      Proceedings of Kyushu Regional Conference of Society of Japan Science Teaching

      Volume: 49 Pages: 61-62

    • Related Report
      2023 Annual Research Report
    • Open Access
  • [Journal Article] A kinematic study of the disc-outflow system around a high-mass protostar G59.783+0.065 probed by methanol and water masers2023

    • Author(s)
      Nakamura M、Motogi K、Nakamura H、Yonekura Y、Fujisawa K
    • Journal Title

      Monthly Notices of the Royal Astronomical Society

      Volume: 526 Issue: 1 Pages: 1000-1021

    • DOI

      10.1093/mnras/stad2725

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Spectral analysis of a parsec-scale jet in M 87: Observational constraint on the magnetic field strengths in the jet2023

    • Author(s)
      Ro, H. et al., including M. Honma
    • Journal Title

      Astronomy & Astrophysics

      Volume: 673 Pages: A159-A159

    • DOI

      10.1051/0004-6361/202142988

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Precessing jet nozzle connecting to a spinning black hole in M872023

    • Author(s)
      Cui Y. et al., incluing M. Honma
    • Journal Title

      Nature

      Volume: 621 Issue: 7980 Pages: 711-715

    • DOI

      10.1038/s41586-023-06479-6

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Water maser distributions and their internal motions in the Sagittarius B2 complex2023

    • Author(s)
      Sakai Daisuke、Oyama Tomoaki、Nagayama Takumi、Honma Mareki、Kobayashi Hideyuki
    • Journal Title

      Publications of the Astronomical Society of Japan

      Volume: 75 Issue: 5 Pages: 937-950

    • DOI

      10.1093/pasj/psad052

    • Related Report
      2023 Annual Research Report
  • [Journal Article] JCMT BISTRO Observations: Magnetic Field Morphology of Bubbles Associated with NGC 63342023

    • Author(s)
      Tahani, Mehrnoosh; Bastien, Pierre; Furuya, Ray S.; Pattle, Kate; Johnstone, Doug; Arzoumanian, Doris; Doi, Yasuo; Hasegawa, Tetsuo; Inutsuka, Shu-ichiro; Hiroyuki Nakanishi et al.
    • Journal Title

      The Astrophysical Journal

      Volume: 944 Issue: 2 Pages: 139-139

    • DOI

      10.3847/1538-4357/acac81

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] The Past and Future of East Asia to Italy: Nearly Global VLBI2023

    • Author(s)
      Gabriele Giovannini, Yuzhu Cui, Kazuhiro Hada, Kunwoo Yi, Hyunwook Ro, Bong Won Sohn, Mieko Takamura, Salvatore Buttaccio, Filippo D’Ammando, Marcello Giroletti, Yoshiaki Hagiwara, Motoki Kino, Evgeniya Kravchenko, Giuseppe Maccaferri, Alexey Melnikov, Kotaro Niinuma, Monica Orienti,..., Akihiro Doi, et al.
    • Journal Title

      Galaxies

      Volume: 11 Issue: 2 Pages: 49-49

    • DOI

      10.3390/galaxies11020049

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Physical properties of the molecular cloud, N4, in SS 433: Evidence for an interaction of molecular cloud with the jet from SS 4332022

    • Author(s)
      Hiroaki Yamamoto, Ryuji Okamoto, Yasuhiro Murata, Hiroyuki Nakanishi, Hiroshi Imai, Kohei Kurahara
    • Journal Title

      Publication of the Astronomical Society of Japan

      Volume: - Issue: 3 Pages: 493-509

    • DOI

      10.1093/pasj/psac012

    • Related Report
      2022 Research-status Report 2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] A Spiral Magnetic Field in a Hub-filament Structure, Monoceros R22022

    • Author(s)
      Hwang, J. et al.
    • Journal Title

      The Astrophysical Journal

      Volume: 941 Issue: 1 Pages: 51-51

    • DOI

      10.3847/1538-4357/ac99e0

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] The JCMT BISTRO-2 Survey: Magnetic Fields of the Massive DR21 Filament2022

    • Author(s)
      Ching, Tao-Chung; Qiu, Keping; Li, Di; Ren, Zhiyuan; Lai, Shih-Ping; Berry, David; Pattle, Kate; Furuya, Ray; Ward-Thompson, Derek; Johnstone, Doug; Hiroyuki Nakanishi et al.
    • Journal Title

      The Astrophysical Journal

      Volume: 941 Issue: 2 Pages: 122-122

    • DOI

      10.3847/1538-4357/ac9dfb

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] MeerKAT’s view of double radio relic galaxy cluster Abell 33762022

    • Author(s)
      Chibueze James O、Akamatsu Hiroki、Parekh Viral、Sakemi Haruka、Ohmura Takumi、van Rooyen Ruby、Akahori Takuya、Nakanishi Hiroyuki、Machida Mami、Takeuchi Tsutomu T、Smirnov Oleg、Kleiner Dane、Maccagni Filippo M
    • Journal Title

      Publications of the Astronomical Society of Japan

      Volume: - Issue: Supplement_1 Pages: S97-S107

    • DOI

      10.1093/pasj/psac009

    • Related Report
      2022 Research-status Report 2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Pre-integration Digital Spectrometer2022

    • Author(s)
      Nakanishi, Hiroyuki; Furuhashi, Masataka; Nakahara, Saeko
    • Journal Title

      2022 Asia-Pacific Microwave Conference (APMC)

      Volume: - Pages: 590-592

    • DOI

      10.23919/apmc55665.2022.9999879

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Overview of the Observing System and Initial Scientific Accomplishments of the East Asian VLBI Network (EAVN)2022

    • Author(s)
      Akiyama, Kazunori; Algaba, Juan-Carlos; An, Tao; Asada, Keiichi ; Asanok, Kitiyanee ; Byun, Do-Young ; Chanapote, Thanapol ; Chen, Wen ; Chen, Zhong ; Cheng, Xiaopeng; Chibueze, James O.; Cho, Ilje; Cho, Se-Hyung ; Chung, Hyun-Soo ; Cui, Lang; Cui, Yuzhu; Doi, Akihiro ; et al.
    • Journal Title

      Galaxies

      Volume: 10 Issue: 6 Pages: 113-113

    • DOI

      10.3390/galaxies10060113

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] The Yamaguchi Interferometer2022

    • Author(s)
      Fujisawa, Kenta; Aoki, Takahiro; Kanazawa, Sho; Akimoto, Masanori; Ogura, Tatsuya; Mori, Kurena; Niinuma, Kotaro; Motogi, Kazuhito; Sawada-Satoh, Satoko et al.
    • Journal Title

      Publications of the Astronomical Society of Japan

      Volume: 74 Issue: 6 Pages: 1415-1420

    • DOI

      10.1093/pasj/psac078

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] B-fields in star-forming region observations (BISTRO): magnetic fields in the filamentary structures of Serpens Main2022

    • Author(s)
      W. Kwon, K. Pattle, S. Sadavoy, 他
    • Journal Title

      The Astrophysical Journal

      Volume: 926 Issue: 2 Pages: 163-163

    • DOI

      10.3847/1538-4357/ac4bbe

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] The Intrinsic Structure of Sagittarius A* at 1.3 cm and 7 mm2022

    • Author(s)
      Cho Ilje、Zhao Guang-Yao、Kawashima Tomohisa、Kino Motoki、Akiyama Kazunori、Johnson Michael D.、Issaoun Sara、Moriyama Kotaro、Cheng Xiaopeng、Algaba Juan-Carlos、Jung Taehyun、Sohn Bong Won、Krichbaum Thomas P.、Wielgus Maciek、Hada Kazuhiro、他51名
    • Journal Title

      The Astrophysical Journal

      Volume: 926 Issue: 2 Pages: 108-108

    • DOI

      10.3847/1538-4357/ac4165

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Revealing the diverse magnetic field morphologies in Taurus dense cores with sensitive sub-millimeter polarimetry2021

    • Author(s)
      E. Chakali, D. Li, R. S. Furuya, 他
    • Journal Title

      The Astrophysical Journal Letters

      Volume: 912 Issue: 2 Pages: L27-L27

    • DOI

      10.3847/2041-8213/abeb1c

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Evidence of an interaction between jets and intra-cluster magnetic layer2021

    • Author(s)
      J. O. Chibueze, H. Sakemi, T. Ohmura, M. Machida, H. Akamatsu, T. Akahori, H. Nakanishi, V. Parekh, R. van Rooyen, T. and T. Takeuchi, 2021
    • Journal Title

      Nature

      Volume: 593 Issue: 7857 Pages: 47-50

    • DOI

      10.1038/s41586-021-03434-1

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] The JCMT BISTRO Survey: 950/450 micron meter polarization study toward NGC 2071IR in Orion B2021

    • Author(s)
      A. Lyo, J. Kim, S. Sadavo, 他
    • Journal Title

      The Astrophysical Journal

      Volume: 918 Issue: 2 Pages: 85-85

    • DOI

      10.3847/1538-4357/ac0ce9

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Origins of the Long-term Variability of the Near-infrared Emission of the Black Hole X-Ray Binary GRS 1915+105 in the X-Ray Low Luminous State2021

    • Author(s)
      Imazato Fumiya、Sasada Mahito、Uemura Makoto、Fukazawa Yasushi、Takahashi Hiromitsu、Nakaoka Tatsuya、Akitaya Hiroshi、Kawabata Koji S.、Akimoto Masanori、Fujisawa Kenta
    • Journal Title

      The Astrophysical Journal

      Volume: 916 Issue: 2 Pages: 114-114

    • DOI

      10.3847/1538-4357/ac07a3

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Measuring the impact of Indonesian antennas on global geodetic VLBI network2021

    • Author(s)
      Huda Ibnu Nurul、Hidayat Taufiq、Dermawan Budi、Lambert Sebastien、Liu Niu、Leon Stephane、Fujisawa Kenta、Yonekura Yoshinori、Sugiyama Koichiro (9番目)、...他12名
    • Journal Title

      Experimental Astronomy

      Volume: 52 Issue: 1-2 Pages: 141-155

    • DOI

      10.1007/s10686-021-09773-1

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] East Asian VLBI Network observations of active galactic nuclei jets: imaging with KaVA+Tianma+Nanshan2021

    • Author(s)
      Cui Yu-Zhu、Hada Kazuhiro、他75名
    • Journal Title

      Research in Astronomy and Astrophysics

      Volume: 21 Issue: 8 Pages: 205-205

    • DOI

      10.1088/1674-4527/21/8/205

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Magnetic vector maps of galaxies with interferometric observational data2024

    • Author(s)
      中西裕之
    • Organizer
      40 Years Evolution of Radio Interferometry in Japan
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 鹿児島大学における高校生向け先取り履修科目開講の試み -高大接続教育の新たな形-2023

    • Author(s)
      中西裕之,岡村浩昭,松本詔,秦重史,加藤太一郎,九町健一,小林励司
    • Organizer
      日本理科教育学会九州支部大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] HI放射機構・原理について2023

    • Author(s)
      中西裕之
    • Organizer
      SKA precursorによる星間物質研究ワークショップ2023
    • Related Report
      2023 Annual Research Report
  • [Presentation] ASKAP/MeerKAT ISM論文レビュー 152023

    • Author(s)
      中西裕之
    • Organizer
      SKA precursorによる星間物質研究ワークショップ2023
    • Related Report
      2023 Annual Research Report
  • [Presentation] 近傍宇宙セッション基調講演2023

    • Author(s)
      中西 裕之
    • Organizer
      SKA-Japanワークショップ2022
    • Related Report
      2022 Research-status Report
  • [Presentation] 手作りアンテナによる天の川銀河の観測実習2023

    • Author(s)
      中西 裕之
    • Organizer
      SKA-Japanワークショップ2022
    • Related Report
      2022 Research-status Report
  • [Presentation] Astrometry of Water Maser sources in the Outer Galaxy with VERA2023

    • Author(s)
      Hiroyuki Nakanishi, Nobuyuki Sakai, Kohei Kurahara and VERA Outer Rotation Curve project members
    • Organizer
      IAU symposium 380 Cosmic Masers
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Fast variability and circular polarization of the bursting methanol maser component in G33.641-0.2282023

    • Author(s)
      Kenta Fujisawa
    • Organizer
      IAU symposium 380 Cosmic Masers
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] A report of trial classes on diurnal and annual motions of stars at junior- high school using a self-made portable planetarium2022

    • Author(s)
      中西 裕之
    • Organizer
      GeoSciEd IX 2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] ITP課題バンク整備に向けた取り組み2022

    • Author(s)
      中西 裕之
    • Organizer
      ITPシンポジウム
    • Related Report
      2022 Research-status Report
  • [Presentation] The Milky Way Galaxy and nearby galaxies in HI2021

    • Author(s)
      中西裕之
    • Organizer
      Linking the Science of Large Interferometer in the 2030s
    • Related Report
      2021 Research-status Report
  • [Presentation] ALMA長基線観測による 銀河系研究の検討2021

    • Author(s)
      中西裕之
    • Organizer
      ALMAによるミリ波/サブミリ波VLBIのサイエンス
    • Related Report
      2021 Research-status Report

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Published: 2021-04-28   Modified: 2025-01-30  

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