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Clarifying magnetic fields in AGN jets by radio and optical polarimetry together with VLBI images

Research Project

Project/Area Number 21H01137
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 16010:Astronomy-related
Research InstitutionNational Astronomical Observatory of Japan

Principal Investigator

Kameno Seiji  国立天文台, アルマプロジェクト, 教授 (20270449)

Co-Investigator(Kenkyū-buntansha) 永井 洋  国立天文台, アルマプロジェクト, 准教授 (00455198)
笹田 真人  東京工業大学, 科学技術創成研究院, 特任助教 (10725352)
植村 誠  広島大学, 宇宙科学センター, 准教授 (50403514)
深沢 泰司  広島大学, 先進理工系科学研究科(理), 教授 (60272457)
秦 和弘  国立天文台, 水沢VLBI観測所, 助教 (60724458)
紀 基樹  工学院大学, 工学部, 講師 (70531234)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,420,000 (Direct Cost: ¥13,400,000、Indirect Cost: ¥4,020,000)
Fiscal Year 2023: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2022: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2021: ¥7,410,000 (Direct Cost: ¥5,700,000、Indirect Cost: ¥1,710,000)
Keywords活動銀河核 / 偏光 / ジェット / 磁場構造 / 活動銀河核ジェット / 多波長偏光観測 / 時間変動 / 磁場
Outline of Research at the Start

活動銀河核から噴出するジェットは光速に近いプラズマの流れで、宇宙で最も大規模な加速機構である。ジェットはシンクロトロン放射により強く偏光するので、磁場による加速機構と考えられている。これを観測的に解明するには、シンクロトロン放射短波長端の可視光(かなた望遠鏡)と長波長端のミリ波 (ALMA) とで偏光の時間変動を比較し、発生したジェット成分の応答関数から磁場構造を求める。さらにVLBI (超長基線干渉計) で撮像によりジェットの運動を測る。シンクロトロン放射スペクトルの両端で同時に偏光をモニターするのは初の試みで、プラズマ中を伝播する衝撃波による磁場構造の変動を捉えられると期待できる。

Outline of Final Research Achievements

We are carrying a polarization monitoring program to clarify the magnetic field structure inside AGN jets. By compiling radio and optical polarization monitoring coupled with VLBI imaging polarimetry, we probe propagation of magnetic field structure in the jet stream. We have conducting ALMA polarization monitoring for 46 sources at the frequencies of 40 GHz, 97 GHz, 155 GHz, 233 GHz, 343 GHz and publicizing in https://www.alma.cl/~skameno/AMAPOLA/. We identified three AGNs that shows swing of the polarization angle by > 90 degrees, and started VLBI polarization imaging and optical monitoring.

Academic Significance and Societal Importance of the Research Achievements

AMAPOLAはミリ波・サブミリ波帯における唯一の偏波モニタープログラムで、総天体数2079天体、うち10日以下の高頻度観測天体46天体、40 GHzから343 GHzまでの周波数範囲など、世界最高の質・量を提供している。急激な偏波成分の増光現象や偏波角の変化事象をATel (Astronomer's Telegram) に報告し、X線偏光観測衛星IXPEとの協調観測でAGNジェットの磁場構造伝播を解明するなど、活動銀河核ジェットの一般的な磁場の性質を理解する研究に貢献している。ミリ波・サブミリ波帯の偏波較正の品質検査にも利用され、電波天文学における偏波計測精度向上に貢献している。

Report

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

    (21 results)

All 2024 2023 2022 2021 Other

All Journal Article (15 results) (of which Int'l Joint Research: 13 results,  Open Access: 14 results,  Peer Reviewed: 8 results) Presentation (4 results) (of which Int'l Joint Research: 3 results) Remarks (2 results)

  • [Journal Article] Observing the Sun with the Atacama Large Millimeter/Submillimeter Array (ALMA): Polarization Observations at 3 mm2024

    • Author(s)
      Shimojo Masumi、Bastian Timothy S.、Kameno Seiji、Hales Antonio S.
    • Journal Title

      Solar Physics

      Volume: 299 Issue: 2 Pages: 20-20

    • DOI

      10.1007/s11207-024-02265-3

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Sub-parsec-scale jet-driven water maser with possible gravitational acceleration in the radio galaxy NGC 10522024

    • Author(s)
      Kameno Seiji、Harikane Yuichi、Sawada-Satoh Satoko、Sawada Tsuyoshi、Saito Toshiki、Nakanishi Kouichiro、Humphreys Elizabeth、Impellizzeri C M Violette
    • Journal Title

      Publications of the Astronomical Society of Japan

      Volume: - Issue: 3 Pages: 340-352

    • DOI

      10.1093/pasj/psae015

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] HINOTORI and its perspective2023

    • Author(s)
      Imai Hiroshi、Kameno Seiji et al.
    • Journal Title

      2023 XXXVth General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS)

      Volume: - Pages: 1-3

    • DOI

      10.23919/ursigass57860.2023.10265583

    • Related Report
      2023 Annual Research Report
    • Open Access / Int'l Joint Research
  • [Journal Article] Probing AGN Molecular Torus via Emission, Absorption, and Polarization2023

    • Author(s)
      Kameno Seiji
    • Journal Title

      ALMA at 10 years: Past, Present, and Future

      Volume: -

    • Related Report
      2023 Annual Research Report
    • Open Access
  • [Journal Article] AMAPOLA: ALMA Polarization Monitoring for Calibrator Sources2023

    • Author(s)
      Kameno Seiji
    • Journal Title

      ALMA at 10 years: Past, Present, and Future

      Volume: -

    • Related Report
      2023 Annual Research Report
    • Open Access
  • [Journal Article] Operational Aspects of ALMA Flux Density Calibration2023

    • Author(s)
      Kneissl, Ruediger; Plarre, Kurt; Radiszcz, Matias; Verdugo, Celia; Guzman, Andres; Dent, William; Kameno, Seiji; Nowajewski, Priscilla; Sawada, Tsuyoshi
    • Journal Title

      ALMA at 10 years: Past, Present, and Future

      Volume: -

    • Related Report
      2023 Annual Research Report
    • Open Access / Int'l Joint Research
  • [Journal Article] Probing the Jet?Torus Interaction in the Radio Galaxy NGC 1052 by Sulfur-bearing Molecules2023

    • Author(s)
      Kameno Seiji、Sawada-Satoh Satoko、Impellizzeri C. M. Violette、Kohno Kotaro、Mart?n Sergio、Espada Daniel、Nakai Naomasa、Sugai Hajime、Terashima Yuichi、Lee Minju M.、Kawakatu Nozomu
    • Journal Title

      The Astrophysical Journal

      Volume: 944 Issue: 2 Pages: 156-156

    • DOI

      10.3847/1538-4357/acb499

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] ALMA detection of 321GHz water maser emission in the radio galaxy NGC10522023

    • Author(s)
      Kameno Seiji、Harikane Yuichi、Sawada-Satoh Satoko、Sawada Tsuyoshi、Saito Toshiki、Nakanishi Kouichiro、Humphreys Elizabeth
    • Journal Title

      Publications of the Astronomical Society of Japan

      Volume: 75 Issue: 2 Pages: L1-L5

    • DOI

      10.1093/pasj/psad011

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Circumnuclear dense gas disk fuelling the active galactic nucleus in the nearby radio galaxy NGC 42612022

    • Author(s)
      Sawada-Satoh Satoko、Kameno Seiji、Trippe Sascha
    • Journal Title

      Astronomy & Astrophysics

      Volume: 664 Pages: L11-L11

    • DOI

      10.1051/0004-6361/202244047

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Extended Q-band (eQ) receiver for Nobeyama 45-m Telescope2022

    • Author(s)
      Chiong Chau-Ching, Tomomi Shimoikura(25人中19番目)
    • Journal Title

      SPIE

      Volume: 12190 Pages: 1-5

    • DOI

      10.1117/12.2629811

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] X-Ray Polarization Observations of BL Lacertae2022

    • Author(s)
      Middei Riccardo、Liodakis Ioannis、Perri Matteo、Uemura Makoto、他144名
    • Journal Title

      The Astrophysical Journal Letters

      Volume: 942 Issue: 1 Pages: 10-23

    • DOI

      10.3847/2041-8213/aca281

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] High-energy Emission Component, Population, and Contribution to the Extragalactic Gamma-Ray Background of Gamma-Ray-emitting Radio Galaxies2022

    • Author(s)
      Fukazawa Yasushi、Matake Hiroto、Kayanoki Taishu、Inoue Yoshiyuki、Finke Justin
    • Journal Title

      The Astrophysical Journal

      Volume: 931 Issue: 2 Pages: 138-138

    • DOI

      10.3847/1538-4357/ac6acb

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] J1159+2914 (4C +29.45, Ton 599) mm/sub-mm flare2021

    • Author(s)
      Seiji Kameno, Paulo Cortes, Edward Fomalont, et al.
    • Journal Title

      The Astronomer's Telegram

      Volume: 14781 Pages: 1-1

    • Related Report
      2021 Annual Research Report
    • Open Access / Int'l Joint Research
  • [Journal Article] J0423-0120 (PKS 0420-014) : The third stage of mm/sub-mm flare2021

    • Author(s)
      Seiji Kameno, Paulo Cortes, Edward Fomalont, et al.
    • Journal Title

      The Astronomer's Telegram

      Volume: 14847 Pages: 1-1

    • Related Report
      2021 Annual Research Report
    • Open Access / Int'l Joint Research
  • [Journal Article] J0854+2006 (OJ 287) : mm/sub-mm flare with polarization angle change2021

    • Author(s)
      Seiji Kameno, Paulo Cortes, Edward Fomalont, et al.
    • Journal Title

      The Astronomer's Telegram

      Volume: 14952 Pages: 1-1

    • Related Report
      2021 Annual Research Report
    • Open Access / Int'l Joint Research
  • [Presentation] Sub-mm water maser in the radio galaxy NGC 10522024

    • Author(s)
      Seiji Kameno
    • Organizer
      Black hole astrophysics with VLBI 2024
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Kobayashi's Unwritten Interferometry Insights2024

    • Author(s)
      Seiji Kameno
    • Organizer
      40 Years Evolution of Radio Interferometry in Japan
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Jet-Torus Interaction in the Radio Galaxy NGC 10522022

    • Author(s)
      Seiji Kameno
    • Organizer
      Torus2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 電波銀河NGC 1052におけるSO吸収線による分子ガストーラスの温度計測2021

    • Author(s)
      亀野誠二
    • Organizer
      日本天文学会秋季年会S18a
    • Related Report
      2021 Annual Research Report
  • [Remarks] AMAPOLA

    • URL

      https://www.alma.cl/~skameno/AMAPOLA/

    • Related Report
      2023 Annual Research Report
  • [Remarks] AMAPOLA Analytic Matrix for ALMA POLArimetry

    • URL

      https://www.alma.cl/~skameno/AMAPOLA/

    • Related Report
      2022 Annual Research Report 2021 Annual Research Report

URL: 

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

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