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Electromagnetic cascade in a black hole magnetosphere

Research Project

Project/Area Number 19K14712
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 15010:Theoretical studies related to particle-, nuclear-, cosmic ray and astro-physics
Research InstitutionHiroshima University (2020-2022)
Tohoku University (2019)

Principal Investigator

Kisaka Shota  広島大学, 先進理工系科学研究科(理), 助教 (10639107)

Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywordsブラックホール / 活動銀河中心核 / 高エネルギーガンマ線 / 粒子シミュレーション / 宇宙ジェット / 電磁カスケード
Outline of Research at the Start

ブラックホールから相対論的速度で放出されるジェットの生成機構は宇宙物理学における最大の謎の一つである. 本研究では, 相対論的ジェットへの物質注入機構であるブラックホール近傍での電磁カスケード現象に注目し, 一般相対論的効果を考慮した上で粒子の加速と生成過程を取り入れた数値シミュレーションコードを用いて, 相対論的ジェットの生成機構の解明を目指す. 具体的には, 数値シミュレーションコードに磁気圏で起こり得るすべてのガンマ線放射機構, 粒子生成機構を取り込み, 生成した粒子の数とエネルギー分布を決定する物理過程を解明する.

Outline of Final Research Achievements

The mechanism of relativistic jets launched from black holes is one of the most mysterious phenomena in astrophysics. To understand this mechanism, it is essential to elucidate the injection process of charged particles to the inside of the jet. In this study, we investigate the electromagnetic cascade phenomena occurring in the vicinity of a black hole using a plasma particle simulation code that appropriately incorporates general relativistic effects and particle creation. As a result, we quantitatively evaluated observably verifiable physical quantities such as the luminosity of gamma rays accompanied with particle creation.

Academic Significance and Societal Importance of the Research Achievements

一般相対論的効果が顕著なブラックホールのごく近傍の物理の検証が、電波による直接イメージ観測などで可能になってきた。本研究はもう一つの直接観測の手段である、極めて短時間の変動を示すガンマ線の明るい増光現象をターゲットとし、その観測データから得られる情報の解釈に不可欠なものである。本研究で得られた結果は、ブラックホールから放出される相対論的ジェットに関係する様々な高エネルギー物理現象の解明につながると期待できる。

Report

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

    (59 results)

All 2023 2022 2021 2020 2019 Other

All Int'l Joint Research (15 results) Journal Article (17 results) (of which Int'l Joint Research: 8 results,  Peer Reviewed: 17 results,  Open Access: 4 results) Presentation (26 results) (of which Int'l Joint Research: 7 results,  Invited: 10 results) Funded Workshop (1 results)

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

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] National Chung Hsing University(中国)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] NASA Goddard Space Flight Center/Columbia University/The George Washington University(米国)

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

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] National Changhua Univ. of Education(中国)

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

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] NASA Goddard Space Flight Center/Haverford College/California Institute of Technology(米国)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] National Changhua Univ. of Education(中国)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] Institut de Recherche en Astrophysique(フランス)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] Technical University of Denmark(デンマーク)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research]

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

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] Avrasya University/Radboud University Nijmegen(トルコ)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] University of Grenoble Alpes(フランス)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] NASA’s Goddard Space Flight Center/Pennsylvania State University/Stanford University(米国)

    • Related Report
      2019 Research-status Report
  • [Journal Article] Detection of a bright burst from the repeating fast radio burst 20201124A at 2GHz2023

    • Author(s)
      Ikebe Sota、Takefuji Kazuhiro、Terasawa Toshio、Eie Sujin、Akahori Takuya、Murata Yasuhiro、Hashimoto Tetsuya、Kisaka Shota、Honma Mareki、Yoshiura Shintaro、Suzuki Syunsaku、Oyama Tomoaki、Sekido Mamoru、Niinuma Kotaro、Takeuchi Hiroshi、Yonekura Yoshinori、Enoto Teruaki
    • Journal Title

      Publications of the Astronomical Society of Japan

      Volume: 75 Issue: 1 Pages: 199-207

    • DOI

      10.1093/pasj/psac101

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Evolutionary Deformation toward the Elastic Limit by a Magnetic Field Confined in the Neutron-star Crust2023

    • Author(s)
      Kojima Yasufumi、Kisaka Shota、Fujisawa Kotaro
    • Journal Title

      The Astrophysical Journal

      Volume: 946 Issue: 2 Pages: 75-75

    • DOI

      10.3847/1538-4357/acc06b

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Magnetically confined mountains on accreting neutron stars with multipole magnetic fields2022

    • Author(s)
      Fujisawa Kotaro、Kisaka Shota、Kojima Yasufumi
    • Journal Title

      Monthly Notices of the Royal Astronomical Society

      Volume: 516 Issue: 4 Pages: 5196-5208

    • DOI

      10.1093/mnras/stac2585

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Strong toroidal magnetic fields sustained by the elastic crust in a neutron star2022

    • Author(s)
      Fujisawa Kotaro、Kojima Yasufumi、Kisaka Shota
    • Journal Title

      Monthly Notices of the Royal Astronomical Society

      Volume: 519 Issue: 3 Pages: 3776-3784

    • DOI

      10.1093/mnras/stac3750

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] High-power laser experiment forming a supercritical collisionless shock in a magnetized uniform plasma at rest2022

    • Author(s)
      Yamazaki R.、Matsukiyo S.、Morita T.、Tanaka S. J.、Umeda T. et al. (54 authors)
    • Journal Title

      Physical Review E

      Volume: 105 Issue: 2 Pages: 025203-025203

    • DOI

      10.1103/physreve.105.025203

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Magnetic field sustained by the elastic force in neutron star crusts2022

    • Author(s)
      Kojima Yasufumi、Kisaka Shota、Fujisawa Kotaro
    • Journal Title

      Monthly Notices of the Royal Astronomical Society

      Volume: 511 Issue: 1 Pages: 480-487

    • DOI

      10.1093/mnras/stac036

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [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 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Multi-frequency radio observations of the radio-loud magnetar XTE J1810-1972021

    • Author(s)
      Eie S. et al., including Honma M.
    • Journal Title

      Publication of Astronomy Society of Japan

      Volume: 73 Issue: 6 Pages: 1563-1574

    • DOI

      10.1093/pasj/psab098

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] A Month of Monitoring the New Magnetar Swift J1555.2-5402 during an X-Ray Outburst2021

    • Author(s)
      Enoto Teruaki、Ng Mason、Hu Chin-Ping、Guver Tolga、Jaisawal Gaurava K.、O’Connor Brendan、Gugus Ersin、Lien Amy、Kisaka Shota et al.
    • Journal Title

      The Astrophysical Journal Letters

      Volume: 920 Issue: 1 Pages: L4-L4

    • DOI

      10.3847/2041-8213/ac2665

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] On the angular momentum extraction from the rotation powered pulsars2021

    • Author(s)
      Shibata Shinpei、Kisaka Shota
    • Journal Title

      Monthly Notices of the Royal Astronomical Society

      Volume: 507 Issue: 1 Pages: 1055-1063

    • DOI

      10.1093/mnras/stab2206

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Magneto-elastic equilibrium of a neutron star crust2021

    • Author(s)
      Kojima Yasufumi、Kisaka Shota、Fujisawa Kotaro
    • Journal Title

      Monthly Notices of the Royal Astronomical Society

      Volume: 506 Issue: 3 Pages: 3936-3945

    • DOI

      10.1093/mnras/stab1848

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Enhanced x-ray emission coinciding with giant radio pulses from the Crab Pulsar2021

    • Author(s)
      Enoto T. et al, including Honma M.
    • Journal Title

      Science

      Volume: 372 Issue: 6538 Pages: 187-190

    • DOI

      10.1126/science.abd4659

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / 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 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Evolution of magnetic deformation in neutron star crust2020

    • Author(s)
      Kojima Yasufumi、Kisaka Shota、Fujisawa Kotaro
    • Journal Title

      Monthly Notices of the Royal Astronomical Society

      Volume: 502 Issue: 2 Pages: 2097-2104

    • DOI

      10.1093/mnras/staa3489

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Suzaku and Fermi view of the supernova remnant 3C 3962019

    • Author(s)
      Sezer A、Ergin T、Cesur N、Tanaka S J、Kisaka S、Ohira Y、Yamazaki R
    • Journal Title

      Monthly Notices of the Royal Astronomical Society

      Volume: 492 Issue: 1 Pages: 1484-1491

    • DOI

      10.1093/mnras/stz3571

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Upscattered Cocoon Emission in Short Gamma-Ray Bursts as High-energy Gamma-Ray Counterparts to Gravitational Waves2019

    • Author(s)
      Kimura Shigeo S.、Murase Kohta、Ioka Kunihito、Kisaka Shota、Fang Ke、Meszaros Peter
    • Journal Title

      The Astrophysical Journal

      Volume: 887 Issue: 1 Pages: L16-L16

    • DOI

      10.3847/2041-8213/ab59e1

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Observational diversity of magnetized neutron stars2019

    • Author(s)
      Enoto Teruaki、Kisaka Shota、Shibata Shinpei
    • Journal Title

      Reports on Progress in Physics

      Volume: 82 Issue: 10 Pages: 106901-106901

    • DOI

      10.1088/1361-6633/ab3def

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] パルサー磁気圏のグローバル粒子シミュレーション2023

    • Author(s)
      木坂将大
    • Organizer
      2023年冬季「中性子星・超新星残骸及び関連天体」研究会
    • Related Report
      2022 Annual Research Report
  • [Presentation] マグネターにおける磁場と弾性力2023

    • Author(s)
      木坂将大
    • Organizer
      日本物理学会 2023年春季大会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Theoretical study for experimental verification of conditions of coherent radiation and stimulated emission for understanding of Fast Radio Bursts2022

    • Author(s)
      木坂将大
    • Organizer
      光・量子ビーム科学合同シンポジウム2022
    • Related Report
      2022 Annual Research Report
  • [Presentation] パルサー・マグネターの磁気圏現象と中性子星内部構造2022

    • Author(s)
      木坂将大
    • Organizer
      RCNP研究会「低エネルギー核物理と高エネルギー天文学で読み解く中性子星」
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] パルサー磁気圏のグローバル粒子シミュレーション2022

    • Author(s)
      木坂将大
    • Organizer
      高エネルギー宇宙物理学研究会2022
    • Related Report
      2022 Annual Research Report
  • [Presentation] The response of black hole spark gaps to external changes: A production mechanism of rapid TeV flares?2022

    • Author(s)
      Shota Kisaka
    • Organizer
      Black Hole Astrophysics with VLBI 2022
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] The electromagnetic cascade in neutron star and black hole magnetospheres2021

    • Author(s)
      Shota Kisaka
    • Organizer
      High Energy Density Science 2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 低光度AGNのTeVガンマ線光度とその時間変動2021

    • Author(s)
      木坂 将大, Amir Levinson, 當真賢二
    • Organizer
      日本天文学会 2021年秋季年会
    • Related Report
      2021 Research-status Report
  • [Presentation] X線-電波モードチェンジングモデル2021

    • Author(s)
      木坂 将大
    • Organizer
      研究会「中性子星・超新星残骸及び関連天体」
    • Related Report
      2021 Research-status Report
  • [Presentation] 電波銀河のTeVフレア機構2021

    • Author(s)
      木坂 将大
    • Organizer
      第34回理論懇シンポジウム
    • Related Report
      2021 Research-status Report
  • [Presentation] 低光度AGNのTeVフレアの起源2021

    • Author(s)
      木坂 将大
    • Organizer
      高エネルギー宇宙物理学研究会 2021
    • Related Report
      2021 Research-status Report
  • [Presentation] Transition of polar cap activity2021

    • Author(s)
      木坂 将大
    • Organizer
      ~中性子星の観測と理論~研究活性化ワークショップ 2021
    • Related Report
      2021 Research-status Report
  • [Presentation] かにパルサーの巨大電波パルスに伴うX線超過の理論モデル2021

    • Author(s)
      木坂将大, 榎戸輝揚, 寺澤敏夫, Chin-Ping Hu, 村田泰宏, 竹内央, 岳藤一宏, 関戸衛, 米倉覚則, 三澤浩昭, 土屋史紀, 青木貴弘, 徳丸宗利, 本間希樹, 亀谷收, 小山友明, 浅野勝晃, 柴田晋平, 田中周太, Zaven Arzoumanian, Keith C. Gendreau, and the NICER collaboration
    • Organizer
      日本天文学会 2021年春季年会
    • Related Report
      2020 Research-status Report
  • [Presentation] Energy conversion efficiency in magnetospheric gaps around Kerr black holes2021

    • Author(s)
      Shota Kisaka
    • Organizer
      Black Hole Astrophysics with VLBI: Multi-Wavelength and Multi-Messenger Era
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] 高速電波バーストのブレイクスルー2020

    • Author(s)
      木坂将大
    • Organizer
      第33回 理論懇シンポジウム
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] GRPモデル再考2020

    • Author(s)
      木坂将大
    • Organizer
      研究会「中性子星および関連現象~興味ある課題を検討しよう~」
    • Related Report
      2020 Research-status Report
  • [Presentation] Magnetospheric gaps around stellar mass black holes2020

    • Author(s)
      木坂将大
    • Organizer
      高エネルギー宇宙物理学研究会2020
    • Related Report
      2020 Research-status Report
  • [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, Amir Levinson, 當真賢二, Benoit Cerutti
    • Organizer
      日本天文学会 2020年秋季年会
    • Related Report
      2020 Research-status Report
  • [Presentation] ブラックホール磁気圏2020

    • Author(s)
      木坂 将大
    • Organizer
      小研究会「相対論的現象で探る宇宙の進化I」
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] パルサーからの硬X線放射2020

    • Author(s)
      木坂 将大
    • Organizer
      研究会「高感度・広帯域X線天文衛星FORCEで探る高エネルギー宇宙」
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] Particle acceleration in a starved magnetosphere of a Kerr black hole2020

    • Author(s)
      Shota Kisaka
    • Organizer
      "Active Galactic Nucleus Jets in the Event Horizon Telescope Era" (AGN Jet Workshop 2020)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] ブラックホール磁気圏での粒子加速領域2019

    • Author(s)
      木坂 将大
    • Organizer
      高エネルギー宇宙物理学研究会2019
    • Related Report
      2019 Research-status Report
  • [Presentation] Scattered Short Gamma-Ray Bursts as Electromagnetic Counterparts to Gravitational Waves2019

    • Author(s)
      Shota Kisaka
    • Organizer
      Gamma-ray Bursts in the Gravitational Wave Era 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Scattered short gamma-ray bursts as electromagnetic counterparts to Gravitational Waves2019

    • Author(s)
      Shota Kisaka, Kunihito Ioka, Kazumi Kashiyama, Takashi Nakamura
    • Organizer
      Ioffe Workshop on GRBs and other transient sources: 25 Years of Konus-Wind Experiment
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Pair multiplicity in the black hole magnetosphere2019

    • Author(s)
      Shota Kisaka
    • Organizer
      Workshop to bring together experts on High Energy Astrophysics from Japan and Israel
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 中性子星連星合体から得られる電磁波放射の理論解釈2019

    • Author(s)
      木坂 将大
    • Organizer
      原子核物理でつむぐrプロセス -Nuclear physics of the r process-
    • Related Report
      2019 Research-status Report
    • Invited
  • [Funded Workshop] "Active Galactic Nucleus Jets in the Event Horizon Telescope Era" (AGN Jet Workshop 2020)2020

    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2024-01-30  

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