Theoretical study on binary black hole formation

• Project Area: Gravitational wave physics and astronomy: Genesis
• Project/Area Number: 17H06360
• Research Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
• Allocation Type: Single-year Grants
• Review Section: Science and Engineering
• Research Institution: Tohoku University
• Principal Investigator: 大向 一行 東北大学, 理学研究科, 教授 (70390622)
• Co-Investigator(Kenkyū-buntansha): 須佐 元 甲南大学, 理工学部, 教授 (00323262) ; 町田 正博 九州大学, 理学研究院, 准教授 (10402786) ; 谷川 衝 東京大学, 大学院総合文化研究科, 助教 (20550742) ; 細川 隆史 京都大学, 理学研究科, 准教授 (30413967) ; 藤井 通子 東京大学, 大学院理学系研究科(理学部), 准教授 (90722330)
• Project Period (FY): 2017-06-30 – 2022-03-31
• Project Status: Granted (Fiscal Year 2021)
• Budget Amount: ¥122,980,000 (Direct Cost: ¥94,600,000、Indirect Cost: ¥28,380,000); Fiscal Year 2021: ¥25,740,000 (Direct Cost: ¥19,800,000、Indirect Cost: ¥5,940,000); Fiscal Year 2020: ¥25,740,000 (Direct Cost: ¥19,800,000、Indirect Cost: ¥5,940,000); Fiscal Year 2019: ¥25,740,000 (Direct Cost: ¥19,800,000、Indirect Cost: ¥5,940,000); Fiscal Year 2018: ¥25,740,000 (Direct Cost: ¥19,800,000、Indirect Cost: ¥5,940,000); Fiscal Year 2017: ¥20,020,000 (Direct Cost: ¥15,400,000、Indirect Cost: ¥4,620,000)
• Keywords: 星形成 / ブラックホール / 連星形成 / 連星進化 / 星団形成 / 磁気流体力学 / 輻射流体力学

Outline of Annual Research Achievements

昨年度までの計画で適合格子流体シミュレーションコードSFMATOにray-tracingによる輻射輸送モジュールを実装した。今年度の計画ではこれを用いて、重力波としてその合体が観測されている大質量のブラックホール連星の形成過程の輻射流体シミュレーションを実行した。とりわけ大質量連星の形成では系を構成する各々の星からの輻射フィードバックが重要になるが、複数光源からの輻射輸送を組み込んだ、このような高解像度シミュレーションは世界初である。それにより太陽の数十倍程度の大体同じ程度の質量の星からなる連星系がごく自然に形成されることが見いだされた。
また初代星形成シミュレーションを簡単な状態方程式を用いる近似を採用して長時間計算を行うことで、その際に同時に何個の星が生まれるのかについて見積もった。その結果、中心の大質量星からのフィードバックが重要になる時期までに数十個の小質量星が同時に生まれてくることが予想された。
高密度な星団内部における多体重力相互作用による連星ブラックホールの形成過程に関しては、昨年度までに実行した重力多体系シミュレーションの結果を用いて、伴星が主系列星の場合にブラックホールの存在をガイアをはじめとする位置天文学観測により検出できる可能性を見積もったところ、銀河系内に10個程度そのような系が見いだされることが分かった。このような系は伴星である主系列星の表面組成に主星のブラックホール形成時の超新星爆発による重元素汚染の兆候が見られないことから、元々連星として形成された系（フィールド連星）と区別可能である。

Current Status of Research Progress

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

Reason

当初の研究計画とほぼ同じスケジュールで研究が遂行できている。

Strategy for Future Research Activity

これまでほぼ当初の研究計画どおり研究を遂行出来ているので、今後も代表者と分担者、研究協力者は一致協力、鋭意努力を継続して当初計画のまま推進する予定である。

Research Products

• [Int'l Joint Research] Peking University(中国)
• [Int'l Joint Research] Sapienza University of Rome(イタリア)
• [Int'l Joint Research] University of Tuebingen(ドイツ)
• [Int'l Joint Research] University of Leiden(オランダ)
• [Int'l Joint Research] Peking University(中国)
• [Int'l Joint Research] Sapienza University of Rome(イタリア)
• [Int'l Joint Research] University of Tuebingen(ドイツ)
• [Int'l Joint Research] University of Leiden(オランダ)
• [Int'l Joint Research] Sapienza University of Rome(イタリア)
• [Int'l Joint Research] Leiden University(オランダ)
• [Int'l Joint Research] University of Tuebingen(ドイツ)
• [Journal Article] The Birth of a Massive First-star Binary (2020)
  • Author(s): Sugimura Kazuyuki、Matsumoto Tomoaki、Hosokawa Takashi、Hirano Shingo、Omukai Kazuyuki
  • Journal Title: The Astrophysical Journal Volume: 892 Issue: 1 Pages: L14-L14
  • DOI: 10.3847/2041-8213/ab7d37
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Misalignment of magnetic fields, outflows, and discs in star-forming clouds (2020)
  • Author(s): Machida, Masahiro N.; Hirano, Shingo; Kitta, Hideyuki
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 491 Pages: 2180-2197
  • DOI: 10.1093/mnras/stz3159
  • Peer Reviewed / Open Access
• [Journal Article] Different modes of star formation - II. Gas accretion phase of initially subcritical star-forming clouds (2020)
  • Author(s): Machida, Masahiro N.; Basu, Shantanu
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 494 Issue: 1 Pages: 827-845
  • DOI: 10.1093/mnras/staa672
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Ionization degree and magnetic diffusivity in the primordial star-forming clouds (2019)
  • Author(s): Nakauchi Daisuke、Omukai Kazuyuki、Susa Hajime
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 488 Issue: 2 Pages: 1846-1862
  • DOI: 10.1093/mnras/stz1799
  • Peer Reviewed
• [Journal Article] Spectral energy distribution of the first galaxies: contribution from pre-main-sequence stars (2019)
  • Author(s): Mitani Hiroto、Yoshida Naoki、Omukai Kazuyuki、Hosokawa Takashi
  • Journal Title: Monthly Notices of the Royal Astronomical Society: Letters Volume: 488 Issue: 1 Pages: L64-L68
  • DOI: 10.1093/mnrasl/slz100
  • Peer Reviewed
• [Journal Article] Merge or Survive: Number of Population III Stars per Minihalo (2019)
  • Author(s): Susa Hajime
  • Journal Title: The Astrophysical Journal Volume: 877 Issue: 2 Pages: 99-99
  • DOI: 10.3847/1538-4357/ab1b6f
  • Peer Reviewed
• [Journal Article] Driving conditions of protostellar outflows in different star-forming environments (2019)
  • Author(s): Higuchi Koki、Machida Masahiro N、Susa Hajime
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 486 Issue: 3 Pages: 3741-3754
  • DOI: 10.1093/mnras/stz1079
  • Peer Reviewed
• [Journal Article] Dependence of Hall coefficient on grain size and cosmic ray rate and implication for circumstellar disc formation (2019)
  • Author(s): Koga, Shunta; Tsukamoto, Yusuke; Okuzumi, Satoshi; Machida, Masahiro N.
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 484 Issue: 2 Pages: 2119-2136
  • DOI: 10.1093/mnras/sty3524
  • Peer Reviewed
• [Journal Article] The First Two Thousand Years of Star Formation (2019)
  • Author(s): Machida Masahiro N.、Basu Shantanu
  • Journal Title: The Astrophysical Journal Volume: 876 Issue: 2 Pages: 149-149
  • DOI: 10.3847/1538-4357/ab18a7
• [Journal Article] Origin of misalignments: protostellar jet, outflow, circumstellar disc, and magnetic field (2019)
  • Author(s): Hirano, Shingo; Machida, Masahiro N.
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 485 Issue: 4 Pages: 4667-4674
  • DOI: 10.1093/mnras/stz740
  • Peer Reviewed / Open Access
• [Journal Article] Survival rates of planets in open clusters: the Pleiades, Hyades, and Praesepe clusters (2019)
  • Author(s): Fujii M. S.、Hori Y.
  • Journal Title: Astronomy & Astrophysics Volume: 624 Pages: A110-A110
  • DOI: 10.1051/0004-6361/201834677
  • Peer Reviewed / Open Access
• [Journal Article] The Keplerian Three-body Encounter. I. Insights on the Origin of the S-stars and the G-objects in the Galactic Center (2019)
  • Author(s): Trani Alessandro A.、Fujii Michiko S.、Spera Mario
  • Journal Title: The Astrophysical Journal Volume: 875 Issue: 1 Pages: 42-42
  • DOI: 10.3847/1538-4357/ab0e70
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Growth of intermediate mass black holes by tidal disruption events in the first star clusters (2019)
  • Author(s): Sakurai Yuya、Yoshida Naoki、Fujii Michiko S
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 484 Issue: 4 Pages: 4665-4677
  • DOI: 10.1093/mnras/stz315
  • Peer Reviewed
• [Journal Article] Kinematics of subclusters in star cluster complexes: imprint of their parental molecular clouds (2019)
  • Author(s): Fujii M S
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 486 Issue: 3 Pages: 3019-3026
  • DOI: 10.1093/mnras/stz1056
  • Peer Reviewed
• [Journal Article] Gravitational-wave emission from binary black holes formed in open clusters (2019)
  • Author(s): Kumamoto Jun、Fujii Michiko S、Tanikawa Ataru
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 486 Issue: 3 Pages: 3942-3950
  • DOI: 10.1093/mnras/stz1068
  • Peer Reviewed
• [Journal Article] The Keplerian Three-body Encounter. II. Comparisons with Isolated Encounters and Impact on Gravitational Wave Merger Timescales (2019)
  • Author(s): Trani Alessandro A.、Spera Mario、Leigh Nathan W. C.、Fujii Michiko S.
  • Journal Title: The Astrophysical Journal Volume: 885 Issue: 2 Pages: 135-135
  • DOI: 10.3847/1538-4357/ab480a
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Effect of interstellar objects on metallicity of low-mass first stars formed in a cosmological model (2019)
  • Author(s): Kirihara Takanobu、Tanikawa Ataru、Ishiyama Tomoaki
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 486 Issue: 4 Pages: 5917-5923
  • DOI: 10.1093/mnras/stz1277
  • Peer Reviewed / Open Access
• [Journal Article] Property of young massive clusters in a galaxygalaxy merger remnant (2019)
  • Author(s): Matsui Hidenori , Tanikawa Ataru , Saitoh Takayuki R
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 71 Issue: 1 Pages: 19-19
  • DOI: 10.1093/pasj/psy139
  • Peer Reviewed
• [Journal Article] Condition for dust evacuation from the first galaxies (2018)
  • Author(s): Fukushima Hajime , Yajima Hidenobu , Omukai Kazuyuki
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 477 Issue: 1 Pages: 10711085-10711085
  • DOI: 10.1093/mnras/sty799
  • Peer Reviewed
• [Journal Article] Stunted accretion growth of black holes by combined effect of the flow angular momentum and radiation feedback (2018)
  • Author(s): Sugimura Kazuyuki , Hosokawa Takashi , Yajima Hidenobu , Inayoshi Kohei , Omukai Kazuyuki
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 478 Issue: 3 Pages: 39613975-39613975
  • DOI: 10.1093/mnras/sty1298
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Condition for low-mass star formation in shock-compressed metal-poor clouds (2018)
  • Author(s): Nakauchi Daisuke , Omukai Kazuyuki , Schneider Raffaella
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 480 Issue: 1 Pages: 10431056-10431056
  • DOI: 10.1093/mnras/sty1911
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Evolution of magnetic fields in collapsing star-forming clouds under different environments (2018)
  • Author(s): Higuchi, Koki; Machida, Masahiro N.; Susa, Hajime
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 475 Issue: 3 Pages: 3331-3347
  • DOI: 10.1093/mnras/sty046
  • Peer Reviewed
• [Journal Article] Metal-poor star formation triggered by the feedback effects from Pop III stars (2018)
  • Author(s): Chiaki Gen、Susa Hajime、Hirano Shingo
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 475 Issue: 4 Pages: 4378-4395
  • DOI: 10.1093/mnras/sty040
  • Peer Reviewed / Open Access
• [Journal Article] Radiation Hydrodynamics Simulations of Photoevaporation of Protoplanetary Disks by Ultraviolet Radiation: Metallicity Dependence (2018)
  • Author(s): Nakatani Riouhei、Hosokawa Takashi、Yoshida Naoki、Nomura Hideko、Kuiper Rolf
  • Journal Title: The Astrophysical Journal Volume: 857 Issue: 1 Pages: 57-57
  • DOI: 10.3847/1538-4357/aab70b
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Radiation hydrodynamics simulations of the formation of direct-collapse supermassive stellar systems (2018)
  • Author(s): S. Chon, T. Hosokawa, N. Yoshida
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 475 Issue: 3 Pages: 4104-4121
  • DOI: 10.1093/mnras/sty086
  • Peer Reviewed
• [Journal Article] The Impact of Feedback in Massive Star Formation. II. Lower Star Formation Efficiency at Lower Metallicity (2018)
  • Author(s): Tanaka Kei E. I. , Tan Jonathan C. , Zhang Yichen , Hosokawa Takashi
  • Journal Title: The Astrophysical Journal Volume: 861 Issue: 1 Pages: 68-68
  • DOI: 10.3847/1538-4357/aac892
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] First hydrodynamics simulations of radiation forces and photoionization feedback in massive star formation (2018)
  • Author(s): Kuiper R. , Hosokawa T.
  • Journal Title: Astronomy & Astrophysics Volume: 616 Pages: A101-A101
  • DOI: 10.1051/0004-6361/201832638
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Radiation Hydrodynamics Simulations of Photoevaporation of Protoplanetary Disks. II. Metallicity Dependence of UV and X-Ray Photoevaporation (2018)
  • Author(s): Nakatani Riouhei、Hosokawa Takashi、Yoshida Naoki、Nomura Hideko、Kuiper Rolf
  • Journal Title: The Astrophysical Journal Volume: 865 Issue: 1 Pages: 75-75
  • DOI: 10.3847/1538-4357/aad9fd
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Episodic excursions of low-mass protostars on the Hertzsprung-Russell diagram (2018)
  • Author(s): Elbakyan Vardan G、Vorobyov Eduard I、Rab Christian、Meyer Dominique M-A、Guedel Manuel、Hosokawa Takashi、Yorke Harold
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 484 Issue: 1 Pages: 146-160
  • DOI: 10.1093/mnras/sty3517
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] The dynamics of stellar disks in live dark-matter halos (2018)
  • Author(s): Fujii M S、Bedorf J、Baba J、Zwart S Portegies
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 印刷中 Issue: 2 Pages: 1451-1471
  • DOI: 10.1093/mnras/sty711
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Modelling the Milky Way as a dry Galaxy (2018)
  • Author(s): Fujii M S、Bedorf J、Baba J、Portegies Zwart S
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 482 Issue: 2 Pages: 1983-2015
  • DOI: 10.1093/mnras/sty2747
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Metal pollution of low-mass Population III stars through accretion of interstellar objects like ‘Oumuamua (2018)
  • Author(s): Tanikawa Ataru , Suzuki Takeru K , Doi Yasuo
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 70 Issue: 4 Pages: 80-80
  • DOI: 10.1093/pasj/psy075
  • Peer Reviewed
• [Journal Article] Massive outflows driven by magnetic effects - II. Comparison with observations (2018)
  • Author(s): Matsushita, Yuko; Sakurai, Yuya; Hosokawa, Takashi; Machida, Masahiro N.
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 475 Issue: 1 Pages: 391-403
  • DOI: 10.1093/mnras/stx3070
  • Peer Reviewed
• [Journal Article] Massive outflows driven by magnetic effects in star-forming clouds with high mass accretion rates (2018)
  • Author(s): Matsushita, Yuko; Machida, Masahiro N.; Sakurai, Yuya; Hosokawa, Takashi
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 475 Issue: 1 Pages: 1026-1049
  • DOI: 10.1093/mnras/stx893
  • Peer Reviewed
• [Journal Article] Three-dimensional Simulation of Double Detonations in the Double-degenerate Model for Type Ia Supernovae and Interaction of Ejecta with a Surviving White Dwarf Companion (2018)
  • Author(s): Tanikawa Ataru、Nomoto Ken’ichi、Nakasato Naohito
  • Journal Title: The Astrophysical Journal Volume: 868 Issue: 2 Pages: 90-90
  • DOI: 10.3847/1538-4357/aae9ee
  • Peer Reviewed / Open Access
• [Journal Article] Does Misalignment between Magnetic Field and Angular Momentum Enhance or Suppress Circumstellar Disk Formation? (2018)
  • Author(s): Tsukamoto Y.、Okuzumi S.、Iwasaki K.、Machida M. N.、Inutsuka S.
  • Journal Title: The Astrophysical Journal Volume: 868 Issue: 1 Pages: 22-41
  • DOI: 10.3847/1538-4357/aae4dc
  • Peer Reviewed / Open Access
• [Journal Article] Tidal Disruption of a White Dwarf by a Black Hole: The Diversity of Nucleosynthesis, Explosion Energy, and the Fate of Debris Streams (2018)
  • Author(s): Kawana Kojiro , Tanikawa Ataru , Yoshida Naoki
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: - Issue: 3 Pages: 842-842
  • DOI: 10.1093/mnras/sty842
  • Peer Reviewed / Open Access
• [Journal Article] High-resolution Hydrodynamic Simulation of Tidal Detonation of a Helium White Dwarf by an Intermediate Mass Black Hole (2018)
  • Author(s): Tanikawa Ataru
  • Journal Title: The Astrophysical Journal Volume: 858 Issue: 1 Pages: 26-26
  • DOI: 10.3847/1538-4357/aaba79
  • Peer Reviewed
• [Journal Article] Tidal double detonation: a new mechanism for the thermonuclear explosion of a white dwarf induced by a tidal disruption event (2018)
  • Author(s): Tanikawa Ataru
  • Journal Title: Monthly Notices of the Royal Astronomical Society: Letters Volume: 475 Issue: 1 Pages: 67-71
  • DOI: 10.1093/mnrasl/sly006
  • Peer Reviewed
• [Journal Article] Formation of the First Star Clusters and Massive Star Binaries by Fragmentation of Filamentary Primordial Gas Clouds (2018)
  • Author(s): Hirano Shingo , Yoshida Naoki , Sakurai Yuya , Fujii Michiko S.
  • Journal Title: The Astrophysical Journal Volume: 855 Issue: 1 Pages: 17-17
  • DOI: 10.3847/1538-4357/aaaaba
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Different modes of star formation: gravitational collapse of magnetically subcritical cloud (2018)
  • Author(s): Machida, Masahiro N.; Higuchi, Koki; Okuzumi, Satoshi
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 473 Issue: 3 Pages: 3080-3094
  • DOI: 10.1093/mnras/stx2589
  • Peer Reviewed
• [Journal Article] Upper stellar mass limit by radiative feedback at low-metallicities: metallicity and accretion rate dependence (2017)
  • Author(s): Fukushima Hajime、Omukai Kazuyuki、Hosokawa Takashi
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 473 Issue: 4 Pages: 4754-4772
  • DOI: 10.1093/mnras/stx2620
  • Peer Reviewed
• [Journal Article] The detection rates of merging binary black holes originating from star clusters and their mass function (2017)
  • Author(s): Fujii Michiko S.、Tanikawa Ataru、Makino Junichiro
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 69 Issue: 6 Pages: 94-108
  • DOI: 10.1093/pasj/psx108
  • Peer Reviewed
• [Journal Article] A Detached Protostellar Disk around a ~0.2 Mo Protostar in a Possible Site of a Multiple Star Formation in a Dynamical Environment in Taurus (2017)
  • Author(s): Tokuda Kazuki、Onishi Toshikazu、Saigo Kazuya、Hosokawa Takashi、Matsumoto Tomoaki、Inutsuka Shu-ichiro、Machida Masahiro N.、Tomida Kengo、Kunitomo Masanobu、Kawamura Akiko、Fukui Yasuo、Tachihara Kengo
  • Journal Title: The Astrophysical Journal Volume: 849 Issue: 2 Pages: 101-101
  • DOI: 10.3847/1538-4357/aa8e9e
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Rapid Black Hole Growth under Anisotropic Radiation Feedback (2017)
  • Author(s): Sugimura, Kazuyuki; Hosokawa, Takashi; Yajima, Hidenobu; Omukai, Kazuyuki
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 未定 Issue: 1 Pages: 62-79
  • DOI: 10.1093/mnras/stx769
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] The impact of the Hall effect during cloud core collapse: Implications for circumstellar disk evolution (2017)
  • Author(s): Tsukamoto Yusuke、Okuzumi Satoshi、Iwasaki Kazunari、Machida Masahiro N.、Inutsuka Shu-ichiro
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 69 Issue: 6
  • DOI: 10.1093/pasj/psx113
  • Peer Reviewed
• [Journal Article] Formation of intermediate-mass black holes through runaway collisions in the first star clusters (2017)
  • Author(s): Sakurai Yuya , Yoshida Naoki , Fujii Michiko S. , Hirano Shingo
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 472 Issue: 2 Pages: 1677-1684
  • DOI: 10.1093/mnras/stx2044
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Primordial protostars accreting beyond the ΩΓ-limit: radiation effect around the star-disc boundary (2017)
  • Author(s): Takahashi Sanemichi Z. , Omukai Kazuyuki
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 472 Issue: 1 Pages: 532-541
  • DOI: 10.1093/mnras/stx1988
  • Peer Reviewed
• [Journal Article] PENTACLE: Parallelized particle-particle particle-tree code for planet formation (2017)
  • Author(s): Iwasawa Masaki、Oshino Shoichi、Fujii Michiko S.、Hori Yasunori
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 69 Issue: 5 Pages: 81-81
  • DOI: 10.1093/pasj/psx073
  • Peer Reviewed
• [Journal Article] Supersonic gas streams enhance the formation of massive black holes in the early universe (2017)
  • Author(s): Hirano Shingo、Hosokawa Takashi、Yoshida Naoki、Kuiper Rolf
  • Journal Title: Science Volume: 357 Issue: 6358 Pages: 1375-1378
  • DOI: 10.1126/science.aai9119
  • NAID: 120006349313
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Fates of the dense cores formed by fragmentation of filaments: do they fragment again or not? (2017)
  • Author(s): Sugimura Kazuyuki、Mizuno Yurina、Matsumoto Tomoaki、Omukai Kazuyuki
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 469 Issue: 4 Pages: 4022-4033
  • DOI: 10.1093/mnras/stx1129
  • Peer Reviewed
• [Journal Article] Blocking Metal Accretion onto Population III Stars by Stellar Wind (2017)
  • Author(s): Tanaka Shuta J.、Chiaki Gen、Tominaga Nozomu、Susa Hajime
  • Journal Title: The Astrophysical Journal Volume: 844 Issue: 2 Pages: 137-137
  • DOI: 10.3847/1538-4357/aa7e2c
  • Peer Reviewed / Open Access
• [Journal Article] Disk-driven rotating bipolar outflow in Orion Source I (2017)
  • Author(s): 10.Hirota, T. *, Machida, M. N., Matsushita, Y., Motogi, K., Matsumoto, N., Kim, M. K., Burns, R. A., Honma, M.
  • Journal Title: Nature Astronomy Volume: 1 Issue: 7 Pages: 0146-0146
  • DOI: 10.1038/s41550-017-0146
  • Peer Reviewed / Int'l Joint Research
• [Presentation] Primordial & Extremely Metal-poor high-mass star formation in the early universe (2019)
  • Author(s): Takashi Hosokawa
  • Organizer: First Stars VI
  • Int'l Joint Research / Invited
• [Presentation] Number of population III stars per minihalo (2019)
  • Author(s): Hajime Susa
  • Organizer: First Stars VI
  • Int'l Joint Research
• [Presentation] A03 group report (2019)
  • Author(s): Kazuyuki Omukai
  • Organizer: The Third Annual Area Symposium, Gravitational wave physics and astronomy: Genesis
  • Int'l Joint Research
• [Presentation] Formation of PopIII binaries in minihalos (2019)
  • Author(s): Hajime Susa
  • Organizer: The Third Annual Area Symposium, Gravitational wave physics and astronomy: Genesis
  • Int'l Joint Research
• [Presentation] Formation rate of LB-1 like systems through dynamical interactions (2019)
  • Author(s): Ataru Tanikawa
  • Organizer: The Third Annual Area Symposium, Gravitational wave physics and astronomy: Genesis
  • Int'l Joint Research
• [Presentation] From First Stars to First Black Holes (2018)
  • Author(s): Kazuyuki Omukai
  • Organizer: The early growth of supermassive black holes
  • Int'l Joint Research / Invited
• [Presentation] Feedback from accreting seed black holes and progenitor stars (2018)
  • Author(s): Takashi Hosokawa
  • Organizer: The early growth of supermassive black holes
  • Int'l Joint Research / Invited
• [Presentation] Status Report of A03 in FY2018: Quest for BH binary (2018)
  • Author(s): Kazuyuki Omukai
  • Organizer: The Second annual symposium of the innovative area "Gravitational Wave Physics and Astronomy: Genesis"
  • Int'l Joint Research
• [Presentation] Feedback and Fragmentation: key processes in high-mass star formation across the cosmic time (2018)
  • Author(s): Takashi Hosokawa
  • Organizer: Stellar Archaeology as a Time Machine to the First Stars
  • Int'l Joint Research / Invited
• [Presentation] Metal pollution of low-mass Population III stars through accretion of interstellar objects (2018)
  • Author(s): Ataru Tanikawa
  • Organizer: Stellar Archaeology as a Time Machine to the First Stars
  • Int'l Joint Research
• [Presentation] Feedback from seed black holes and their progenitors (2018)
  • Author(s): Takashi Hosokawa
  • Organizer: The early growth of supermassive black holes
  • Int'l Joint Research / Invited
• [Presentation] Modeling the Milky Way Galaxy as an N-body System (2018)
  • Author(s): Michiko Fujii
  • Organizer: The Eighth East Asian Numerical Astrophysics Meeting
  • Int'l Joint Research / Invited
• [Presentation] 連星形成 (2018)
  • Author(s): 町田正博
  • Organizer: 初代星・初代銀研究会2019
  • Invited
• [Presentation] Report of research group A03 (2018)
  • Author(s): Kazuyuki Omukai
  • Organizer: The First Annual Area Symposium: Gravitational wave physics and astronomy: Genesis
  • Int'l Joint Research
• [Presentation] Toward understanding massive star formation in low-metallcity environments (2018)
  • Author(s): Takashi Hosokawa
  • Organizer: The First Annual Area Symposium: Gravitational wave physics and astronomy: Genesis
  • Int'l Joint Research
• [Presentation] Binary star evolution (2018)
  • Author(s): Ataru Tanikawa
  • Organizer: The First Annual Area Symposium: Gravitational wave physics and astronomy: Genesis
  • Int'l Joint Research
• [Presentation] Understanding primordial star formation: Francesco's contribution (2017)
  • Author(s): Kazuyuki Omukai
  • Organizer: Francesco's Legacy: Star Formation in Space and Time
  • Int'l Joint Research / Invited