超大規模計算と超高精度観測で解き明かすブラックホールジェットの駆動機構と多様性

• Project/Area Number: 21H04488
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Medium-sized Section 16:Astronomy and related fields
• Research Institution: University of Tsukuba
• Principal Investigator: 大須賀 健 筑波大学, 計算科学研究センター, 教授 (90386508)
• Co-Investigator(Kenkyū-buntansha): 秦 和弘 名古屋市立大学, 大学院理学研究科, 准教授 (60724458) ; 當真 賢二 東北大学, 学際科学フロンティア研究所, 教授 (70729011) ; 高橋 博之 駒澤大学, 総合教育研究部, 准教授 (80613405)
• Project Period (FY): 2021-04-05 – 2026-03-31
• Project Status: Granted (Fiscal Year 2025)
• Budget Amount: ¥40,690,000 (Direct Cost: ¥31,300,000、Indirect Cost: ¥9,390,000); Fiscal Year 2025: ¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000); Fiscal Year 2024: ¥9,490,000 (Direct Cost: ¥7,300,000、Indirect Cost: ¥2,190,000); Fiscal Year 2023: ¥9,490,000 (Direct Cost: ¥7,300,000、Indirect Cost: ¥2,190,000); Fiscal Year 2022: ¥10,140,000 (Direct Cost: ¥7,800,000、Indirect Cost: ¥2,340,000); Fiscal Year 2021: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
• Keywords: ブラックホール / ジェット / 降着円盤 / 数値シミュレーション / ブラックホールジェット / 大規模数値シミュレーション / 高精度観測

Outline of Research at the Start

超大規模数値計算と超高精度観測の融合により、ブラックホールジェットの駆動機構と多様性の起源を、ブラックホール降着円盤もろとも解明するのが本研究の目的である。大規模な一般相対論的輻射磁気流体シミュレーションを実施してジェットと円盤を徹底的に調査し、シミュレーション結果をもとにした一般相対論的輻射輸送計算で、偏光分布も含めた撮像イメージおよび輻射スペクトル、それらの時間変動を理論的に予言する。理論予測と最新の観測データを直接比較することで、ジェットの多様な駆動機構を突き止める。宇宙に存在する全てのブラックホール天体の統一的理解、巨大ブラックホールの形成史の解明に向けた基盤的研究である。

Outline of Annual Research Achievements

一般相対論的な効果を考慮した多波長輻射輸送コード RAIKOU (来光) を開発した。本コードは、流体シミュレーションによって得られたブラックホール降着円盤やジェットの構造を入力とし、そこから放射されるスペクトルや撮像イメージを計算することが可能である。電波からX線、ガンマ線までの広い波長帯における放射特性を再現できる点が特徴である。テスト計算の一環として、X線で観測されるブラックホールシャドーの構造も予言し、その可視化を行うことに成功した。
また、一般相対論的輻射磁気流体力学シミュレーションを用いて、超エディントン降着状態にある中性子星周囲の降着流とアウトフローの詳細な構造を再現した。降着円盤からは輻射駆動型のアウトフローが発生し、中性子星の磁極付近に降着柱が現れることがわかった。アウトフローは熱的放射の、降着柱はX線パルスの起源と理解できる。この結果をもとに、超高輝度X線パルサー"Swift J0243.6+6124"の観測結果とシミュレーション結果を比較することで、中性子星がもつ双極子磁場の強度が10e13G以下という制限を与えることに成功した。
さらに、一般相対論的磁気流体力学シミュレーションを用いて、ブラックホールジェットの歳差運動を再現することに成功した。この歳差運動はブラックホールのスピンに起因しており、M87において観測されているジェット方向の周期的変化を説明できることを示した。これにより、M87のブラックホールがスピンしていることを裏付ける強力な証拠を理論的に提示した。

Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

本研究は、ブラックホール降着流およびアウトフローの大局的構造やその観測的特徴を解明することを目的として、数値シミュレーションと輻射輸送計算を組み合わせた手法を推進している。本年度は、昨年度開発した一般相対論的輻射磁気流体力学（GR-RMHD）計算コードに加え、観測と理論モデルの比較に不可欠な一般相対論的輻射輸送計算コードを完成させ、理論と観測の詳細な比較が可能となった。また、一般相対性理論特有の現象である慣性系の引きずりによる降着円盤やジェットの歳差運動をGR-RMHDシミュレーションで再現し、その結果が電波観測データの解釈に貢献したことは特筆すべき成果である。さらに、ブラックホールと並ぶ高密度天体である中性子星をターゲットとしたシミュレーションにも成功し、中心天体の性質が降着流全体の構造に与える影響を調べるための基盤が整った。これらの成果は論文として既に出版されており、学会や研究会での発表も多数行っている。以上より、研究は概ね順調に進行していると判断できる。

Strategy for Future Research Activity

大規模な一般相対論的輻射磁気流体力学（GR-RMHD）シミュレーションを駆使し、多様な性質を持つ降着流の構造とダイナミクス、さらには降着流から噴出するアウトフローを網羅的に調査する。併せて、一般相対論的輻射輸送計算を用い、理論モデルと観測との直接比較も継続して行う。また、ブラックホールと中性子星の相違を明らかにするため、磁場を持つ中性子星周囲の降着流の調査も進める。具体的には、本年度に実施した低光度降着流における歳差運動の解析に引き続き、高光度降着流における歳差運動を調査し、ブラックホールスピンによる慣性系の引きずりが輻射駆動型ジェットの方向変化や観測される光度変動にどのように影響を与えるのかを解明する。さらに、計算領域を限界まで拡張したシミュレーションによって、降着円盤の大域的構造を明らかにすることを目指す。磁場構造についても、双極子磁場に加えて四重極子磁場を持つ場合の中性子星降着流の構造調査へと拡張する。加えて、機械学習やGPUを用いた計算コードの効率化も継続的に推進し、より大規模・高精度なシミュレーションの実現を図る。シミュレーションは大須賀(代表者)と髙橋(分担者)が行い、理論モデルとの比較を當真(分担者)が行う。疑似観測の結果と実際の観測データの比較を秦(分担者)が担当する。

Research Products

• [Journal Article] Three-dimensional radiation hydrodynamics simulations of wandering intermediate-mass black holes considering the anisotropic radiation and dust sublimation (2024)
  • Author(s): Ogata Erika、Ohsuga Ken、Fukushima Hajime、Yajima Hidenobu
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 528 Issue: 2 Pages: 2588-2599
  • DOI: 10.1093/mnras/stae195
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The persistent shadow of the supermassive black hole of M 87. I. Observations, calibration, imaging, and analysis (2024)
  • Author(s): Event Horizon Telescope Collaboration et al., incluing M. Honma, S. Ikeda, M. Sasada
  • Journal Title: Astronomy & Astronphysics Volume: 681 Pages: A79-A79
  • DOI: 10.1051/0004-6361/202347932
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] One-dimensional General Relativistic Particle-in-cell Simulations of Stellar-mass Black Hole Magnetospheres: A Semianalytic Model of Gamma-Rays from Gaps (2024)
  • Author(s): Kin Koki、Kisaka Shota、Toma Kenji、Kimura Shigeo S.、Levinson Amir
  • Journal Title: The Astrophysical Journal Volume: 964 Issue: 1 Pages: 78-78
  • DOI: 10.3847/1538-4357/ad20cd
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] RAIKOU (来光): A General Relativistic, Multiwavelength Radiative Transfer Code (2023)
  • Author(s): Kawashima Tomohisa、Ohsuga Ken、Takahashi Hiroyuki R.
  • Journal Title: The Astrophysical Journal Volume: 949 Issue: 2 Pages: 101-101
  • DOI: 10.3847/1538-4357/acc94a
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Modeling of Thermal Emission from ULX Pulsar Swift J0243.6+6124 with General Relativistic Radiation MHD Simulations (2023)
  • Author(s): Inoue Akihiro、Ohsuga Ken、Takahashi Hiroyuki R.、Asahina Yuta
  • Journal Title: The Astrophysical Journal Volume: 952 Issue: 1 Pages: 62-62
  • DOI: 10.3847/1538-4357/acd6ea
  • Peer Reviewed / Open Access
• [Journal Article] Precessing jet nozzle connecting to a spinning black hole in M87 (2023)
  • 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
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Decomposing the Spectrum of Ultraluminous X-Ray Pulsar NGC 300 ULX-1 (2023)
  • Author(s): Kobayashi Shogo B.、Noda Hirofumi、Enoto Teruaki、Kawashima Tomohisa、Inoue Akihiro、Ohsuga Ken
  • Journal Title: The Astrophysical Journal Volume: 955 Issue: 2 Pages: 124-124
  • DOI: 10.3847/1538-4357/acf0bb
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The high energy X-ray probe (HEX-P): studying extreme accretion with ultraluminous X-ray sources (2023)
  • Author(s): Bachetti Matteo et al.
  • Journal Title: Frontiers in Astronomy and Space Sciences Volume: 10
  • DOI: 10.3389/fspas.2023.1289432
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] A ring-like accretion structure in M87 connecting its black hole and jet (2023)
  • Author(s): Ru L. et al., including M. Honma
  • Journal Title: Nature Volume: 616 Issue: 7958 Pages: 686-690
  • DOI: 10.1038/s41586-023-05843-w
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Probing the Heart of Active Narrow-line Seyfert 1 Galaxies with VERA Wideband Polarimetry (2023)
  • Author(s): Takamura Mieko、Hada Kazuhiro、Honma Mareki、Oyama Tomoaki、Yamauchi Aya、Suzuki Syunsaku、Hagiwara Yoshiaki、Orienti Monica、D’Ammando Filippo、Park Jongho、Kam Minchul、Doi Akihiro
  • Journal Title: The Astrophysical Journal Volume: 952 Issue: 1 Pages: 47-47
  • DOI: 10.3847/1538-4357/acd9a8
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Spectral analysis of a parsec-scale jet in M 87: Observational constraint on the magnetic field strengths in the jet (2023)
  • Author(s): Ro, H. et al., including M. Honma
  • Journal Title: Astronomy & Astrophysics Volume: 673 Pages: A159-A159
  • DOI: 10.1051/0004-6361/202142988
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] High-energy Neutrino Emission Associated with Gravitational-wave Signals: Effects of Cocoon Photons and Constraints on Late-time Emission (2023)
  • Author(s): Matsui Riki、Kimura Shigeo S.、Toma Kenji、Murase Kohta
  • Journal Title: The Astrophysical Journal Volume: 950 Issue: 2 Pages: 190-190
  • DOI: 10.3847/1538-4357/acd004
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Gamma rays from a reverse shock with turbulent magnetic fields in GRB 180720B (2023)
  • Author(s): Arimoto Makoto、Asano Katsuaki、Kawabata Koji S.、Toma Kenji、Gill Ramandeep、Granot Jonathan、Ohno Masanori、Takahashi Shuta、Ogino Naoki、Goto Hatsune、Nakamura Kengo、Nakaoka Tatsuya、Takagi Kengo、Kawabata Miho、Yamanaka Masayuki、Sasada Mahito、Razzaque Soebur
  • Journal Title: Nature Astronomy Volume: 8 Issue: 1 Pages: 134-144
  • DOI: 10.1038/s41550-023-02119-1
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] QWIND3: UV line-driven accretion disc wind models for AGN feedback (2023)
  • Author(s): Quera-Bofarull Arnau、Done Chris、Lacey Cedric G、Nomura Mariko、Ohsuga Ken
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 518 Issue: 2 Pages: 2693-2711
  • DOI: 10.1093/mnras/stac3171
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Relativistic resistive magneto-hydrodynamics code for high-energy heavy-ion collisions (2023)
  • Author(s): Nakamura Kouki、Miyoshi Takahiro、Nonaka Chiho、Takahashi Hiroyuki R.
  • Journal Title: The European Physical Journal C Volume: 83 Issue: 3 Pages: 229-229
  • DOI: 10.1140/epjc/s10052-023-11343-y
  • Peer Reviewed / Open Access
• [Journal Article] Charge-dependent anisotropic flow in high-energy heavy-ion collisions from a relativistic resistive magneto-hydrodynamic expansion (2023)
  • Author(s): Nakamura Kouki、Miyoshi Takahiro、Nonaka Chiho、Takahashi Hiroyuki R.
  • Journal Title: Physical Review C Volume: 107 Issue: 3 Pages: 034912-034912
  • DOI: 10.1103/physrevc.107.034912
  • Peer Reviewed
• [Journal Article] Directed flow in relativistic resistive magneto-hydrodynamic expansion for symmetric and asymmetric collision systems (2023)
  • Author(s): Nakamura Kouki、Miyoshi Takahiro、Nonaka Chiho、Takahashi Hiroyuki R.
  • Journal Title: Physical Review C Volume: 107 Issue: 1 Pages: 014901-014901
  • DOI: 10.1103/physrevc.107.014901
  • Peer Reviewed
• [Journal Article] Super-Resolved Image of M87 Observed with East Asian VLBI Network (2023)
  • Author(s): Tazaki F., et al., including Honma, M.,
  • Journal Title: Galaxies Volume: 11 Issue: 2 Pages: 39-39
  • DOI: 10.3390/galaxies11020039
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Large-scale outflow structure and radiation properties of super-Eddington flow: Dependence on the accretion rates (2022)
  • Author(s): Yoshioka, Shogo ; Mineshige, Shin ; Ohsuga, Ken ; Kawashima, Tomohisa ; Kitaki, Takaaki
  • Journal Title: PASJ Volume: 74 Issue: 6 Pages: 1378-1395
  • DOI: 10.1093/pasj/psac076
  • Peer Reviewed
• [Journal Article] 3D photon conserving code for time-dependent general relativistic radiative transfer: CARTOON (2022)
  • Author(s): Takahashi Mikiya M、Ohsuga Ken、Takahashi Rohta、Ogawa Takumi、Umemura Masayuki、Asahina Yuta
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 517 Issue: 3 Pages: 3711-3722
  • DOI: 10.1093/mnras/stac2822
  • Peer Reviewed / Open Access
• [Journal Article] Diverse Polarimetric Features of AGN Jets from Various Viewing Angles: Towards a Unified View (2022)
  • Author(s): Tsunetoe, Yuh; Mineshige, Shin; Kawashima, Tomohisa; Ohsuga, Ken; Akiyama, Kazunori; Takahashi, Hiroyuki R.
  • Journal Title: Galaxies Volume: 10 Issue: 5 Pages: 103-113
  • DOI: 10.3390/galaxies10050103
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Component of Energy Flow from Supercritical Accretion Disks Around Rotating Stellar Mass Black Holes (2022)
  • Author(s): Utsumi Aoto、Ohsuga Ken、Takahashi Hiroyuki R.、Asahina Yuta
  • Journal Title: The Astrophysical Journal Volume: 935 Issue: 1 Pages: 26-26
  • DOI: 10.3847/1538-4357/ac7eb8
  • Peer Reviewed / Open Access
• [Journal Article] Investigating the Disk-Jet Structure in M87 through Flux Separation in the Linear and Circular Polarization Images (2022)
  • Author(s): Tsunetoe, Yuh; Mineshige, Shin; Kawashima, Tomohisa; Ohsuga, Ken; Akiyama, Kazunori; Takahashi, Hiroyuki R.
  • Journal Title: ApJ Volume: 931 Issue: 1 Pages: 25-25
  • DOI: 10.3847/1538-4357/ac66dd
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Structure of the super-Eddington outflow and its impact on the cosmological scale (2022)
  • Author(s): Botella Ignacio、Mineshige Shin、Kitaki Takaaki、Ohsuga Ken、Kawashima Tomohisa
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 74 Issue: 2 Pages: 384-397
  • DOI: 10.1093/pasj/psac001
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] General Relativistic Radiation Magnetohydrodynamics Simulations of Black Hole Accretion Disks: Comparison of Methods Based on Variable Eddington Tensor and Based on M1 Closure (2022)
  • Author(s): Asahina Yuta、Ohsuga Ken
  • Journal Title: The Astrophysical Journal Volume: 929 Issue: 1 Pages: 93-93
  • DOI: 10.3847/1538-4357/ac5d37
  • Peer Reviewed / Open Access
• [Journal Article] High-energy Gamma Rays from Magnetically Arrested Disks in Nearby Radio Galaxies (2022)
  • 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
  • Peer Reviewed / Open Access
• [Journal Article] Magnetic Reconnection in Black Hole Magnetospheres: Lepton Loading into Jets, Superluminal Radio Blobs, and Multiwavelength Flares (2022)
  • 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
  • Peer Reviewed / Open Access
• [Journal Article] The Photon Ring in M87* (2022)
  • Author(s): Broderick, A. E., Pesce, D. W., Gold, R., incl. Hada, K., et al.
  • Journal Title: The Astrophysical Journal Volume: 935 Issue: 1 Pages: 61-61
  • DOI: 10.3847/1538-4357/ac7c1d
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] First Sagittarius A* Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole in the Center of the Milky Way (2022)
  • Author(s): Event Horizon Telescope Collaboration
  • Journal Title: The Astrophysical Journal Letters Volume: 930 Issue: 2 Pages: L12-L12
  • DOI: 10.3847/2041-8213/ac6674
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Implications from the Velocity Profile of the M87 Jet: A Possibility of a Slowly Rotating Black Hole Magnetosphere (2022)
  • Author(s): Kino Motoki、Takahashi Masaaki、Kawashima Tomohisa、Park Jongho、Hada Kazuhiro、Ro Hyunwook、Cui Yuzhu
  • Journal Title: The Astrophysical Journal Volume: 939 Issue: 2 Pages: 83-83
  • DOI: 10.3847/1538-4357/ac8c2f
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Collimation of the Relativistic Jet in the Quasar 3C 273 (2022)
  • Author(s): Okino Hiroki、Akiyama Kazunori、Asada Keiichi、Gomez Jose L.、Hada Kazuhiro、Honma Mareki、Krichbaum Thomas P.、Kino Motoki、Nagai Hiroshi、Bach Uwe、Blackburn Lindy、Bouman Katherine L.、et al.
  • Journal Title: The Astrophysical Journal Volume: 940 Issue: 1 Pages: 65-65
  • DOI: 10.3847/1538-4357/ac97e5
  • Peer Reviewed / Open Access / Int'l Joint Research
• [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
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The Intrinsic Structure of Sagittarius A* at 1.3 cm and 7 mm (2022)
  • 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
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Radiation hydrodynamics simulations of line-driven AGN disc winds: metallicity dependence and black hole growth (2021)
  • Author(s): Nomura Mariko、Omukai Kazuyuki、Ohsuga Ken
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 507 Issue: 1 Pages: 904-913
  • DOI: 10.1093/mnras/stab2214
  • Peer Reviewed
• [Journal Article] Hoyle-Lyttleton accretion on to black hole accretion disks with super-Eddington luminosity for dusty gas (2021)
  • Author(s): Ogata Erika、Ohsuga Ken、Yajima Hidenobu
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 73 Issue: 4 Pages: 929-942
  • DOI: 10.1093/pasj/psab055
  • Peer Reviewed
• [Journal Article] Polarization images of accretion flow around supermassive black holes: Imprints of toroidal field structure (2021)
  • Author(s): Tsunetoe Yuh、Mineshige Shin、Ohsuga Ken、Kawashima Tomohisa、Akiyama Kazunori
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 73 Issue: 4 Pages: 912-928
  • DOI: 10.1093/pasj/psab054
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Matter Density Distribution of General Relativistic Highly Magnetized Jets Driven by Black Holes (2021)
  • 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
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Backreaction of mass and angular momentum accretion on black holes: General formulation of metric perturbations and application to the Blandford-Znajek process (2021)
  • 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
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Broadband Multi-wavelength Properties of M87 during the 2017 Event Horizon Telescope Campaign (2021)
  • Author(s): EHT Multi-wavelength Science Working Group et al.
  • Journal Title: The Astrophysical Journal Letters Volume: 911 Issue: 1 Pages: L11-L11
  • DOI: 10.3847/2041-8213/abef71
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Testing the magnetic flux paradigm for AGN radio loudness with a radio-intermediate quasar (2021)
  • Author(s): Chamani W.、Savolainen T.、Hada K.、Xu M. H.
  • Journal Title: Astronomy and Astrophysics Volume: 652 Pages: A14-A14
  • DOI: 10.1051/0004-6361/202140676
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Event Horizon Telescope observations of the jet launching and collimation in Centaurus A (2021)
  • Author(s): Janssen Michael、Falcke Heino、Kadler Matthias、Hada Kazuhiro、Kino Motoki、et al.
  • Journal Title: Nature Astronomy Volume: 5 Issue: 10 Pages: 1017-1028
  • DOI: 10.1038/s41550-021-01417-w
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Morphological Transition of the Compact Radio Lobe in 3C 84 via the Strong Jet-Cloud Collision (2021)
  • Author(s): Kino Motoki、Niinuma Kotaro、Kawakatu Nozomu、Nagai Hiroshi、Giovannini Gabriele、Orienti Monica、Wajima Kiyoaki、D’Ammando Filippo、Hada Kazuhiro、Giroletti Marcello、Gurwell Mark
  • Journal Title: The Astrophysical Journal Letters Volume: 920 Issue: 1 Pages: L24-L24
  • DOI: 10.3847/2041-8213/ac24fa
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] East Asian VLBI Network observations of active galactic nuclei jets: imaging with KaVA+Tianma+Nanshan (2021)
  • 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
  • Peer Reviewed / Int'l Joint Research
• [Presentation] ブラックホール降着円盤の数値シミュレーション (2024)
  • Author(s): 朝比奈雄太, 大須賀健, 内海碧人, 上野航介, 髙橋博之
  • Organizer: 2023(令和5)年度 国立天文台CfCAユーザーズミーティング
  • Invited
• [Presentation] ブラックホール降着円盤の数値シミュレーション (2024)
  • Author(s): 朝比奈雄太, 大須賀健, 内海碧人, 上野航介, 髙橋博之
  • Organizer: ブラックホール大研究会 ~星質量から超巨大ブラックホールまで~
  • Invited
• [Presentation] AGNアウトフローの理論研究と SMBHの進化 (2024)
  • Author(s): 野村真理子, 大須賀健, Chris Done, 大向一行, 水本岬希, 工藤祐己, 和田桂一, 川勝望
  • Organizer: ブラックホール大研究会 ~星質量から超巨大ブラックホールまで~
  • Invited
• [Presentation] 機械学習、観測、シミュレーションの融合による新たな天文学にむけて (2024)
  • Author(s): 大須賀健
  • Organizer: 日本天文学会2024年春季年会
  • Invited
• [Presentation] Black Hole Explorer (BHEX) Mission (2024)
  • Author(s): 秦和弘
  • Organizer: ブラックホール大研究会
  • Invited
• [Presentation] GR-RMHD Simulations of Super-Eddington Flows (2023)
  • Author(s): K. Ohsuga, Y. Asahina, A. Utsumi, A. Inoue, H.R. Takahashi
  • Organizer: New Frontiers in GRMHD Simulations of Accreting Black Holes
  • Int'l Joint Research / Invited
• [Presentation] Radiation MHD simulations of super-/near-Eddington accretion flows and outflows (2023)
  • Author(s): K. Ohsuga
  • Organizer: Astrophysical Black Holes: A Rapidly Moving Fields
  • Int'l Joint Research / Invited
• [Presentation] Radiation Magnetohydrodynamics Simulations of Black Hole Accretion Flows and Outflows (2023)
  • Author(s): K. Ohsuga, H.R. Takahashi, T. Kawashima, Y. Asahina, A. Utsumi, S. Takeuchi, S. Mineshige
  • Organizer: 34th IUPAP Conference on Computational Physics
  • Int'l Joint Research / Invited
• [Presentation] Global Radiation Magnetohydrodynamic Simulations of Precessing Disk around a Spinning Black Hole (2023)
  • Author(s): Y. Asahina and K. Ohsuga
  • Organizer: AAPPS-DPP 2023
  • Int'l Joint Research / Invited
• [Presentation] Numerical simulations of super-Eddington accretion flows (2023)
  • Author(s): K. Ohsuga, H.R. Takahashi, T. Kawashima, Y. Asahina, A. Utsumi
  • Organizer: 32nd Texas Symposium on Relativistic Astrophysics
  • Int'l Joint Research / Invited
• [Presentation] シミュレーションによるブラックホール降着円盤理論の進展 (2023)
  • Author(s): 大須賀健, 髙橋博之, 川島朋尚, 朝比奈雄太, 内海碧人, 嶺重慎, 水本岬希, 都丸亮太, 野村真理子, C.Done
  • Organizer: シミュレーション天文学のこれまでとこれから -ハードウェア・アプリケーション・サイエンス-
  • Invited
• [Presentation] シミュレーションとAIの融合で解明する宇宙の構造と進化 (2023)
  • Author(s): 大須賀健
  • Organizer: 第6回HPCIコンソーシアムシンポジウム
  • Invited
• [Presentation] シミュレーションとAIの融合で解明する宇宙の構造と進化 (2023)
  • Author(s): 大須賀健
  • Organizer: 富岳成果創出加速プログラム基礎科学合同シンポジウム
  • Invited
• [Presentation] AGNアウトフローとSMBHの進化 (2023)
  • Author(s): 野村真理子, 大須賀健, Chris Done, 大向一行, 水本岬希, 工藤祐己, 和田桂一, 川勝望
  • Organizer: 第36回理論懇シンポジウム
  • Invited
• [Presentation] Possibility of black hole spin estimation with time-variable "crescent-shaped" shadow in M87 (2023)
  • Author(s): M. Takahashi, T. Kawashima, K. Ohsuga
  • Organizer: Astrophysical Black Holes: A Rapidly Moving Fields
  • Int'l Joint Research
• [Presentation] General relativistic radiation-MHD simulations of supercritical accretion disk around Kerr-black hole; From weak to strong magnetic field state of the disk. (2023)
  • Author(s): A. Utsumi, K. Ohsuga, H. R. Takahashi, Y. Asahina
  • Organizer: Astrophysical Black Holes: A Rapidly Moving Fields
  • Int'l Joint Research
• [Presentation] General Relativistic Radiation Magnetohydrodynamical simulations of Super-Eddington Accretion Flows onto Magnetized Neutron Stars; Powerful Outflows and Thermal Emission (2023)
  • Author(s): A. Inoue, K. Ohsuga, H. R. Takahashi, Y. Asahina
  • Organizer: 34th IUPAP Conference on Computational Physics
  • Int'l Joint Research
• [Presentation] 巨大ブラックホール近傍の電波観測 (2023)
  • Author(s): 秦和弘
  • Organizer: 山田研究会「宇宙における降着現象」
  • Invited
• [Presentation] EAVN/VLBAによる長期モニターが捉えたM87ジェットの歳差運動 (2023)
  • Author(s): 秦和弘
  • Organizer: 日本天文学会秋季年会
• [Presentation] Magnetic reconnection in black hole magnetospheres as an origin of superluminal radio blobs (2023)
  • Author(s): 當真賢二
  • Organizer: EHT Collaboration Meeting Sumer 2023
  • Int'l Joint Research
• [Presentation] Magnetic reconnection in black hole magnetospheres: lepton loading into jets and superluminal radio blobs (2023)
  • Author(s): 當真賢二
  • Organizer: APRIM 2023
  • Int'l Joint Research
• [Presentation] GRB Prompt Emission Polarization (2023)
  • Author(s): 當真賢二
  • Organizer: New Evolution of Multi-messenger Astrophysics
  • Int'l Joint Research / Invited
• [Presentation] ガンマ線バーストの可視・電波偏光同時観測から測る真の全エネルギー (2023)
  • Author(s): 當真賢二
  • Organizer: 日本天文学会春季年会
• [Presentation] 恩師 高原さんとjet論争 (2023)
  • Author(s): 當真賢二
  • Organizer: 第36回理論懇シンポジウム
  • Invited
• [Presentation] Polarized Radiative Transfer: Linking the Images and Magnetic Fields around Black Holes (2023)
  • Author(s): Y. Tsunetoe and S. Mineshige and T. Kawashima and K. Ohsuga and K. Akiyama and H.R. Takahashi
  • Organizer: Black hole astrophysics with VLBI 2023
  • Int'l Joint Research / Invited
• [Presentation] Event Horizon Telescope Observations of M87 (2022)
  • Author(s): 秦和弘, EHT Collaboration
  • Organizer: hysics of Relativistic Jets on All Scales, IAU-GA 2022 FM1
  • Int'l Joint Research / Invited
• [Presentation] Images, Radiation and Neutrino Spectra of Black Hole Accretion Flows Computed by GRRT Code RAIKOU (2022)
  • Author(s): T. Kawashima, K. Asano, K. Ohsuga, H.R. Takahashi
  • Organizer: The 15th Asia Pacific Physics Conference (APPC15)
  • Int'l Joint Research / Invited
• [Presentation] Radiation hydrodynamics simulations of AGN winds: comparison with observations and impact on SMBH growth (2022)
  • Author(s): M. Nomura, K. Ohsuga, Chris Done, Kazuyuki Omukai, M. Mizumoto, H. Odaka
  • Organizer: The 9th East Asian Numerical Astrophysics Meeting (EANAM9)
  • Int'l Joint Research / Invited
• [Presentation] General relativistic radiation-MHD simulations of supercritical accretion around rotating black holes (2022)
  • Author(s): A. Utsumi, K.Ohsuga, H. R. Takahashi, Y. Asahina
  • Organizer: The 9th East Asian Numerical Astrophysics Meeting (EANAM9)
  • Int'l Joint Research
• [Presentation] ブラックホール降着円盤 およびガス噴出流の理論;これまでの進展と今後の課題 (2022)
  • Author(s): 大須賀健, 他
  • Organizer: Galaxy-IGM workshop 2022
  • Invited
• [Presentation] 輻射磁気流体力学計算によるブラックホール近傍のプラズマ降着流・噴出流のダイナミクス (2022)
  • Author(s): 朝比奈雄太, 大須賀健, 髙橋博之, 内海碧人, 井上壮大, 高橋幹弥
  • Organizer: 第152回 地球電磁気・地球惑星圏学会 総会・講演会
  • Invited
• [Presentation] ブラックホール近傍のプラズマ降着流・噴出流のダイナミクスと観測的特徴 (2022)
  • Author(s): 川島朋尚, 秋山和徳, 大須賀健, 紀基樹, 髙橋博之, 當真賢二, 中村雅徳, 森山小太郎
  • Organizer: 「自然科学における階層と全体」シンポジウム
  • Invited
• [Presentation] ブラックホール降着円盤 およびガス噴出流の理論；これまでの進展と今後の課題 (2022)
  • Author(s): 大須賀健 , 髙橋博之 , 川島朋尚 , 野村真理子 , 北木孝明 , 水本岬希 , 嶺重慎 , 朝比奈雄太 , 小川拓未 , 荻原大樹 , 井上壮大 , 内海碧人 , 高橋幹弥 , 尾形絵梨花 , 武者野拓也 都丸亮太
  • Organizer: Galaxy-IGM workshop 2022
  • Invited
• [Presentation] BH降着円盤シミュレーションの現状と今後 (2022)
  • Author(s): 大須賀健
  • Organizer: 「富岳で加速する素粒子・原子核・宇宙・惑星」シンポジウム
• [Presentation] Radiation hydrodynamics simulations of AGN winds: comparison with observations and impact on SMBH growth (2022)
  • Author(s): M. Nomura and K. Ohsuga and Chris Done and Kazuyuki Omukai and M. Mizumoto and H. Odaka
  • Organizer: The 9th East Asian Numerical Astrophysics Meeting (EANAM9)
  • Int'l Joint Research / Invited
• [Presentation] 相対論的ジェットの工藤・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
  • Invited
• [Presentation] Event Horizon Telescope Observations of Supermassive Black Holes (2022)
  • Author(s): 秦和弘, EHT Collaboration
  • Organizer: East Asian ALMA Science Workshop 2022
  • Int'l Joint Research / Invited
• [Presentation] 巨大ブラックホールの超高解像度電波観測 (2022)
  • Author(s): 秦和弘
  • Organizer: ブラックホールジェット・円盤風研究会
  • Invited
• [Presentation] Event Horizon Telescope Observations of M87 (2022)
  • Author(s): 秦和弘, EHT Collaboration
  • Organizer: Physics of Relativistic Jets on All Scales, IAU-GA 2022 FM1
  • Int'l Joint Research / Invited
• [Presentation] 超臨界降着流の一般相対論的輻射磁気流体シミュレーション (2021)
  • Author(s): 髙橋博之, 大須賀健, 川島朋尚, 朝比奈雄太, 内海 碧人, 井上 壮大
  • Organizer: W50/SS433研究会
  • Invited
• [Presentation] BH降着円盤とジェットと円盤風 (2021)
  • Author(s): 大須賀健
  • Organizer: 多重AGNサイエンスワークショップ
• [Presentation] ブラックホール降着流・噴出流の研究～これまでの成果と今後の課題～ (2021)
  • Author(s): 大須賀健, 髙橋博之, 川島朋尚, 野村真理子, 嶺重慎, 朝比奈雄太, 内海碧人
  • Organizer: 高エネルギー現象で探る宇宙の多様性I
  • Invited
• [Presentation] Overview: ブラックホール降着・噴出流の研究目的と計画 (2021)
  • Author(s): 大須賀健
  • Organizer: 超巨大ブラックホール研究会：その実態・影響・起源の全貌解明に向けて
• [Presentation] Numerical Simulations of Accretion Flows and Outflows around Black Holes/Neutron Stars (2021)
  • Author(s): K. OHSUGA, A. Inoue, A. Utsumi, T. Ogawa, Y. Asahina, H.R.Takahashi, T. Kawashima, M. Nomura, M. Mizumoto, R. Tomaru, C. Done
  • Organizer: European Astronomical Anuual Meeting SS3 :Black holes under the magnifying glass of XRISM and Athena
  • Int'l Joint Research / Invited
• [Presentation] Numerical simulations of disk wind around black holes (2021)
  • Author(s): K. Ohsuga, A. Inoue, A. Utsumi, H.R.Takahashi, T. Kawashima, S. Mineshige, K. Kitaki
  • Organizer: Black Hole Disc Wind conference
  • Int'l Joint Research
• [Presentation] Emission from Black Hole Jets (2021)
  • Author(s): 當真賢二
  • Organizer: Extreme Outflows in Astrophysical Transients
  • Invited
• [Presentation] High-resolution view of collimaiton and acceleration regions of nearby AGN jets (2021)
  • Author(s): 秦和弘
  • Organizer: Extragalactic jets at all scales (Jets2021)
  • Int'l Joint Research / Invited
• [Presentation] 超高解像度電波観測で明かすSMBHの実態 (2021)
  • Author(s): 秦和弘
  • Organizer: 超巨大ブラックホール研究会：その実態・影響・起源の解明に向けて
  • Invited