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Examining the mechanism of driving black hole jets by using new data of high-resolution radio observations

Research Project

Project/Area Number 18H01245
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 16010:Astronomy-related
Research InstitutionTohoku University

Principal Investigator

Toma Kenji  東北大学, 学際科学フロンティア研究所, 准教授 (70729011)

Project Period (FY) 2018-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥17,030,000 (Direct Cost: ¥13,100,000、Indirect Cost: ¥3,930,000)
Fiscal Year 2021: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2020: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2019: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2018: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Keywordsブラックホール / 宇宙ジェット / 活動銀河 / VLBI観測 / PICシミュレーション / MHDシミュレーション
Outline of Final Research Achievements

We performed a unique study on the estimate of spatial distribution of electrons in the jet by using the high-resolution radio images. We performed general relativistic plasma particle simulations, and found that the electron positron pair creation by the gap strong electric field cannot provide a sufficient amount of electrons in the jets. On the other hand, we showed that intermittent magnetic reconnection around the equatorial plane can provide a sufficient amount of electrons in the jets. This is a natural theoretical platform for the particle origin of jets, which is the research target of this project and a long-standing mystery in astrophysics. Furthermore, we joined the Event Horizon Telescope Collaboration to contribute to the theoretical interpretation of the M87 black hole shadow, which has been famous in society in April, 2019. We also studied on jet acceleration mechanism by turbulence and analytic formulation of black hole space-time evolution by jet.

Academic Significance and Societal Importance of the Research Achievements

光さえも出てこられない領域であるブラックホールがいかにしてジェット(噴出流)を駆動するのか?という学術的な基本的問題を観測的に検証するためのステップとして、ジェット中の粒子生成の理論的枠組みを構築することに成功した。また、EHTチームでの共同研究を通して、国籍の違いを越えた協力で一つの目標に到達できることを示せたことは社会的意義を持つ。

Report

(5 results)
  • 2022 Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • Research Products

    (50 results)

All 2023 2022 2021 2020 2019 2018 Other

All Int'l Joint Research (11 results) Journal Article (18 results) (of which Int'l Joint Research: 13 results,  Peer Reviewed: 18 results,  Open Access: 8 results) Presentation (20 results) (of which Int'l Joint Research: 9 results,  Invited: 12 results) Funded Workshop (1 results)

  • [Int'l Joint Research] MIT/University of Illinois/University of Waterloo(米国)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Tel Aviv University(イスラエル)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] ASIAA/National Central University(その他の国・地域 台湾)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] MIT/University of Illinois/University of Waterloo(米国)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] Tel Aviv University(イスラエル)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] ASIAA/National Central University(その他の国・地域 台湾)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] MIT/University of Illinois/University of Waterloo(米国)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] ASIAA/National Central University(その他の国・地域 台湾)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] ASIAA(その他の国・地域 台湾)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] MIT/University of Illinois/University of Waterloo(米国)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] Stockholm University(スウェーデン)

    • Related Report
      2018 Annual Research Report
  • [Journal Article] The Response of Black Hole Spark Gaps to External Changes: A Production Mechanism of Rapid TeV Flares?2022

    • Author(s)
      Kisaka Shota、Levinson Amir、Toma Kenji、Niv Idan
    • Journal Title

      The Astrophysical Journal

      Volume: 924 Issue: 1 Pages: 28-28

    • DOI

      10.3847/1538-4357/ac35da

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] High-energy Gamma Rays from Magnetically Arrested Disks in Nearby Radio Galaxies2022

    • Author(s)
      Kuze Riku、Kimura Shigeo S.、Toma Kenji
    • Journal Title

      The Astrophysical Journal

      Volume: 935 Issue: 2 Pages: 159-159

    • DOI

      10.3847/1538-4357/ac7ec1

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Magnetic Reconnection in Black Hole Magnetospheres: Lepton Loading into Jets, Superluminal Radio Blobs, and Multiwavelength Flares2022

    • Author(s)
      Kimura Shigeo S.、Toma Kenji、Noda Hirofumi、Hada Kazuhiro
    • Journal Title

      The Astrophysical Journal Letters

      Volume: 937 Issue: 2 Pages: L34-L34

    • DOI

      10.3847/2041-8213/ac8d5a

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Backreaction of mass and angular momentum accretion on black holes: General formulation of metric perturbations and application to the Blandford-Znajek process2021

    • Author(s)
      Kimura Masashi、Harada Tomohiro、Naruko Atsushi、Toma Kenji
    • Journal Title

      Progress of Theoretical and Experimental Physics

      Volume: 2021 Issue: 9 Pages: 1-26

    • DOI

      10.1093/ptep/ptab101

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A Jet-bases Emission Model of the EHT2017 Image of M87*2021

    • Author(s)
      Kawashima Tomohisa、Toma Kenji、Kino Motoki、Akiyama Kazunori、Nakamura Masanori、Moriyama Kotaro
    • Journal Title

      The Astrophysical Journal

      Volume: 909 Issue: 2 Pages: 168-168

    • DOI

      10.3847/1538-4357/abd5bb

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Matter Density Distribution of General Relativistic Highly Magnetized Jets Driven by Black Holes2021

    • Author(s)
      Ogihara Taiki、Ogawa Takumi、Toma Kenji
    • Journal Title

      The Astrophysical Journal

      Volume: 911 Issue: 1 Pages: 34-34

    • DOI

      10.3847/1538-4357/abe61b

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Comprehensive Analysis of Magnetospheric Gaps around Kerr Black Holes Using 1D GRPIC Simulations2020

    • Author(s)
      Kisaka Shota、Levinson Amir、Toma Kenji
    • Journal Title

      The Astrophysical Journal

      Volume: 902 Issue: 1 Pages: 80-80

    • DOI

      10.3847/1538-4357/abb46c

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Probing Particle Acceleration through Broadband Early Afterglow Emission of MAGIC Gamma-Ray Burst GRB 190114C2020

    • Author(s)
      Asano Katsuaki、Murase Kohta、Toma Kenji
    • Journal Title

      The Astrophysical Journal

      Volume: 905 Issue: 2 Pages: 105-105

    • DOI

      10.3847/1538-4357/abc82c

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Hadronic High-energy Emission from Magnetically Arrested Disks in Radio Galaxies2020

    • Author(s)
      Kimura Shigeo S.、Toma Kenji
    • Journal Title

      The Astrophysical Journal

      Volume: 905 Issue: 2 Pages: 178-178

    • DOI

      10.3847/1538-4357/abc343

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Efficient acceleration of cylindrical jets: effects of radiative cooling and tangled magnetic field2020

    • Author(s)
      Tanaka Shuta J、Toma Kenji
    • Journal Title

      Monthly Notices of the Royal Astronomical Society

      Volume: 494 Issue: 1 Pages: 338-348

    • DOI

      10.1093/mnras/staa728

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole2019

    • Author(s)
      The Event Horizon Telescope Collaboration、Kawashima Tomohisa、 et al.
    • Journal Title

      The Astrophysical Journal

      Volume: 875 Issue: 1 Pages: L1-L1

    • DOI

      10.3847/2041-8213/ab0ec7

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] First M87 Event Horizon Telescope Results. V. Physical Origin of the Asymmetric Ring2019

    • Author(s)
      The Event Horizon Telescope Collaboration、Kawashima Tomohisa、 et al.
    • Journal Title

      The Astrophysical Journal

      Volume: 875 Issue: 1 Pages: L5-L5

    • DOI

      10.3847/2041-8213/ab0f43

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A Mechanism for the Triple-ridge Emission Structure of AGN Jets2019

    • Author(s)
      Ogihara Taiki、Takahashi Kazuya、Toma Kenji
    • Journal Title

      The Astrophysical Journal

      Volume: 877 Issue: 1 Pages: 19-19

    • DOI

      10.3847/1538-4357/ab1909

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Hunting Axion Dark Matter with Protoplanetary Disk Polarimetry2019

    • Author(s)
      Fujita Tomohiro、Tazaki Ryo、Toma Kenji
    • Journal Title

      Physical Review Letters

      Volume: 122 Issue: 19 Pages: 191101-191101

    • DOI

      10.1103/physrevlett.122.191101

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] ALMA Polarimetry of AT2018cow2019

    • Author(s)
      Huang Kuiyun、Shimoda Jiro、Urata Yuji、Toma Kenji、Yamaoka Kazutaka、Asada Keiichi、Nagai Hiroshi、Takahashi Satoko、Petitpas Glen、Tashiro Makoto
    • Journal Title

      The Astrophysical Journal

      Volume: 878 Issue: 1 Pages: L25-L25

    • DOI

      10.3847/2041-8213/ab23fd

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] First Detection of Radio Linear Polarization in a Gamma-Ray Burst Afterglow2019

    • Author(s)
      Urata Yuji、Toma Kenji、Huang Kuiyun、Asada Keiichi、Nagai Hiroshi、Takahashi Satoko、Petitpas Glen、Tashiro Makoto、Yamaoka Kazutaka
    • Journal Title

      The Astrophysical Journal

      Volume: 884 Issue: 2 Pages: L58-L58

    • DOI

      10.3847/2041-8213/ab48f3

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Parabolic Jets from the Spinning Black Hole in M872018

    • Author(s)
      Nakamura Masanori、Asada Keiichi、Hada Kazuhiro、Pu Hung-Yi、Noble Scott、Tseng Chihyin、Toma Kenji、Kino Motoki et al.
    • Journal Title

      The Astrophysical Journal

      Volume: 868 Issue: 2 Pages: 146-146

    • DOI

      10.3847/1538-4357/aaeb2d

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] The origin of polarization in kilonovae and the case of the gravitational-wave counterpart AT 2017gfo2018

    • Author(s)
      Bulla M. , Covino S. , Kyutoku K. , Tanaka M. , Maund J. R. , Patat F. , Toma K. , Wiersema K. , Bruten J. , Jin Z. P. , et al.
    • Journal Title

      Nature Astronomy

      Volume: 3 Issue: 1 Pages: 99106-99106

    • DOI

      10.1038/s41550-018-0593-y

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] High-energy Neutrino Emission from Accretion Flows2023

    • Author(s)
      Shigeo Kimura
    • Organizer
      NCfA Symposium 2023
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Magnetic reconnection in Black Hole Magnetospheres2023

    • Author(s)
      木村成生
    • Organizer
      ブラックホールジェット・降着円盤・円盤風研究会2023
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] AGNジェットの粒子の起源2022

    • Author(s)
      當真賢二
    • Organizer
      高エネルギー宇宙物理学研究会
    • Related Report
      2021 Annual Research Report
  • [Presentation] ブラックホールジェットの地平面近傍の電波放射機構:Sgr A*で見えない理由2022

    • Author(s)
      木村成生
    • Organizer
      日本天文学会秋季年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Blandford-Znajek過程における時空の時間変化2022

    • Author(s)
      當真賢二
    • Organizer
      日本天文学会春季年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 相対論的ジェットの駆動・加速・放射の基礎理論と諸問題2022

    • Author(s)
      當真賢二
    • Organizer
      ブラックホールジェット・降着円盤・円盤風研究会2022
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] Hadronic emission in disk and pair-creation gap in jet2021

    • Author(s)
      Kenji Toma
    • Organizer
      Polarized Radiation near Supermassive Black Holes
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Emission from Black Hole Jets2021

    • Author(s)
      Kenji Toma
    • Organizer
      Extreme Outflows in Astrophysical Transients
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Polarimetric Studies of GRBs, AGN Jets, and Axion Dark Matter2021

    • Author(s)
      Kenji Toma
    • Organizer
      IAU Symposium 360: Astronomical Polarimetry 2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 粒子シミュレーションで探るブラックホール磁気圏での電磁カスケード現象2020

    • Author(s)
      木坂将大
    • Organizer
      日本天文学会秋季年会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 活動銀河核ジェットにおける一般相対論的理想電磁流体近似解の構築2020

    • Author(s)
      荻原大樹
    • Organizer
      日本天文学会秋季年会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 電波銀河研究の新展開:強磁場降着流からのガンマ線とニュートリノ2020

    • Author(s)
      木村成生
    • Organizer
      日本天文学会秋季年会
    • Related Report
      2020 Annual Research Report
  • [Presentation] M87 black hole shadow image and its connection with the radio jet2019

    • Author(s)
      Kenji Toma
    • Organizer
      High Energy Astrophysics Japan Israel Workshop
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] GRB polarization: an overview2019

    • Author(s)
      Kenji Toma
    • Organizer
      Gamma-Ray Bursts in the Gravitational Wave Era
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Recent Topics in High Energy Astrophysics2019

    • Author(s)
      Kenji Toma
    • Organizer
      14th Asia-Pacific Physics Conference
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] ブラックホールジェット研究の新展開2019

    • Author(s)
      當真賢二
    • Organizer
      第49回天文・天体物理若手夏の学校
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] EHTによるM87*の観測成果 V: 非対称リング放射構造の理論的解釈2019

    • Author(s)
      當真賢二、他EHT Collaboration
    • Organizer
      日本天文学会秋季年会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Formation and dissipation mechanisms of AGN jets2018

    • Author(s)
      Kenji Toma
    • Organizer
      Jet and Shock Breakouts in Cosmic Transients
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] GRB prompt emission polarization: an overview2018

    • Author(s)
      Kenji Toma
    • Organizer
      Shedding new light on gamma-ray bursts with polarization data
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] AGN jet physics on the horizon scale2018

    • Author(s)
      當真賢二
    • Organizer
      宇宙線研究所共同利用小研究会「高エネルギー天体現象の多様性」
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Funded Workshop] Active Galactic Nucleus Jets in the Event Horizon Telescope Era2020

    • Related Report
      2019 Annual Research Report

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Published: 2018-04-23   Modified: 2024-01-30  

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