直接撮像で探る巨大ブラックホール最近傍におけるガス噴出機構

• Project/Area Number: 18H03721
• 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: Yamaguchi University
• Principal Investigator: 新沼 浩太郎 山口大学, 大学院創成科学研究科, 教授 (30434260)
• Co-Investigator(Kenkyū-buntansha): 河野 裕介 国立天文台, 水沢VLBI観測所, 助教 (00370106) ; 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): 2018-04-01 – 2022-03-31
• Project Status: Completed (Fiscal Year 2021)
• Budget Amount: ¥44,980,000 (Direct Cost: ¥34,600,000、Indirect Cost: ¥10,380,000); Fiscal Year 2021: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2020: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000); Fiscal Year 2019: ¥10,790,000 (Direct Cost: ¥8,300,000、Indirect Cost: ¥2,490,000); Fiscal Year 2018: ¥23,530,000 (Direct Cost: ¥18,100,000、Indirect Cost: ¥5,430,000)
• Keywords: 電波天文学 / 短ミリ波VLBI / 活動銀河核ジェット加速機構 / 一般相対論的磁気流体力学 / 一般相対性理論的磁気流体力学

Outline of Annual Research Achievements

本研究の目的は国立天文台の野辺山45m電波望遠鏡（以下NRO45）を含めた日韓合同短ミリ波ＶＬＢＩ（超長基線電波干渉計）観測網を構築し、巨大BHの近傍からガス噴出流の速度場を精密に計測することによりガス噴出機構の解明を目指すことである。
2021年度中に野辺山45m電波望遠鏡（NRO45）の86GHz帯受信システムの性能評価も完了し、３周波同時受信モードにおいて86GHz帯の受信機雑音、開口能率、サイドバンド分離比、およびVLBI観測として重要になる位相安定度が当初目標としていた性能を満たすことを確認できた。また、不具合の見られたVLBI観測用新デジタル記録システムについても問題の特定および解消でき、無事にシステムを立ち上げることができた。これによりNRO45単体としては、鹿児島大学・大阪府立大学・国立天文台と共同で進める三周波同時受信・記録システムを立ち上げることができたといえる。
定常的なVLBI観測体制の構築に向けた試験観測については、継続的なCOVID19の影響もあり遅れつつの実施となっているものの、日韓で新システムを用いた22/43GHzの同時VLBI観測を成功させることができた。86GHz帯についても韓国との間で複数回の試験観測を行うことができているものの、不運な記録系のトラブルなどもあり、成功には至っていない。
引き続き、NRO45現地に赴いての試験観測が必要な状況ではあるが、開発したシステムによる観測が問題無く行える状況にはなっているため、86GHz帯での日韓VLBI試験観測の成功および3周波同時での日韓VLBI観測網による科学観測の実施を目指し研究を推進していく。

Research Progress Status

令和3年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

令和3年度が最終年度であるため、記入しない。

Research Products

• [Int'l Joint Research] 韓国天文研究院(韓国)
• [Int'l Joint Research] 韓国天文研究院(韓国)
• [Int'l Joint Research] 国立ソウル大学/韓国天文宇宙科学研究院(韓国)
• [Int'l Joint Research] 中央研究院 天文及天文物理研究所(その他の国・地域)
• [Int'l Joint Research] The Istituto di Radioastronomia/INAF(イタリア)
• [Int'l Joint Research] Max-Planck Institute for Radio Astronomy(ドイツ)
• [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: Astrophysical Journal Volume: 926 Pages: 108-108
  • DOI: 10.3847/1538-4357/ac4165
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The Variability of the Black Hole Image in M87 at the Dynamical Timescale (2022)
  • Author(s): Satapathy Kaushik、Psaltis Dimitrios、Ozel Feryal、Hada Kazuhiro、Kino Motoki、et al.
  • Journal Title: The Astrophysical Journal Volume: 925 Pages: 13-13
  • DOI: 10.3847/1538-4357/ac332e
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Herschel discovery of far-infrared emission from the hotspot D in the radio galaxy Cygnus A (2022)
  • Author(s): Sunada Yuji、Isobe Naoki、Tashiro Makoto S、Kino Motoki、Koyama Shoko、Nakahara Satomi
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 512 Pages: 5995-6006
  • DOI: 10.1093/mnras/stac826
  • Peer Reviewed
• [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: Astrophysical Journal Letters Volume: 911
  • DOI: 10.3847/2041-8213/abef71
  • 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
  • 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 Pages: 205-205
  • DOI: 10.1088/1674-4527/21/8/205
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] The Polarized Image of a Synchrotron-emitting Ring of Gas Orbiting a Black Hole (2021)
  • Author(s): Narayan Ramesh、Palumbo Daniel C. M.、Johnson Michael D.、Kino Motoki、Hada Kazuhiro、et al.
  • Journal Title: The Astrophysical Journal Volume: 912 Pages: 35-35
  • DOI: 10.3847/1538-4357/abf117
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Constraints on black-hole charges with the 2017 EHT observations of M87* (2021)
  • Author(s): Kocherlakota Prashant、Rezzolla Luciano、Falcke Heino、Hada Kazuhiro、Kino Motoki、et al.
  • Journal Title: Physical Review D Volume: 103 Pages: 104047-104047
  • DOI: 10.1103/physrevd.103.104047
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Persistent Non-Gaussian Structure in the Image of Sagittarius A* at 86 GHz (2021)
  • Author(s): Issaoun S.、Johnson M. D.、Blackburn L.、Kino Motoki、et al.
  • Journal Title: The Astrophysical Journal Volume: 915 Pages: 99-99
  • DOI: 10.3847/1538-4357/ac00b0
  • 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 Pages: 1017-1028
  • DOI: 10.1038/s41550-021-01417-w
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Relativistic jet acceleration region in a black hole magnetosphere (2021)
  • Author(s): Takahashi Masaaki、Kino Motoki、Pu Hung-Yi
  • Journal Title: Physical Review D Volume: 104
  • DOI: 10.1103/physrevd.104.103004
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] A Revised View of the Linear Polarization in the Subparsec Core of M87 at 7 mm (2021)
  • Author(s): Park Jongho、Asada Keiichi、Nakamura Masanori、Kino Motoki、Pu Hung-Yi、Hada Kazuhiro、Kravchenko Evgeniya V.、Giroletti Marcello
  • Journal Title: The Astrophysical Journal Volume: 922 Pages: 180-180
  • DOI: 10.3847/1538-4357/ac26bf
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Jet Collimation and Acceleration in the Giant Radio Galaxy NGC 315 (2021)
  • Author(s): Park Jongho、Hada Kazuhiro、Nakamura Masanori、Asada Keiichi、Zhao Guangyao、Kino Motoki
  • Journal Title: The Astrophysical Journal Volume: 909 Pages: 76-76
  • DOI: 10.3847/1538-4357/abd6ee
  • Peer Reviewed / 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 Pages: 168-168
  • DOI: 10.3847/1538-4357/abd5bb
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] First M87 Event Horizon Telescope Results. VII. Polarization of the Ring (2021)
  • Author(s): Akiyama Kazunori et al. including Hiroshi Nagai
  • Journal Title: Astrophysical Jounal Letters Volume: 910
  • DOI: 10.3847/2041-8213/abe71d
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] First M87 Event Horizon Telescope Results. VIII. Magnetic Field Structure near The Event Horizon (2021)
  • Author(s): Event Horizon Telescope Collaboration
  • Journal Title: Astrophysical Jounal Letters Volume: 910
  • DOI: 10.3847/2041-8213/abe4de
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Polarimetric Properties of Event Horizon Telescope Targets from ALMA (2021)
  • Author(s): Goddi Ciriaco et al.
  • Journal Title: The Astrophysical Journal Letters Volume: 910
  • DOI: 10.3847/2041-8213/abee6a
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Millimeter-VLBI Detection and Imaging of the Gravitationally Lensed γ-Ray Blazar JVAS B0218+357 (2020)
  • Author(s): Hada Kazuhiro、Niinuma Kotaro、Sitarek Julian、Spingola Cristiana、Hirano Ayumi
  • Journal Title: The Astrophysical Journal Volume: 901 Pages: 2-2
  • DOI: 10.3847/1538-4357/abaab1
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Spatially resolved molecular gas properties of host galaxy of Type I superluminous supernova SN?2017egm (2020)
  • Author(s): Hatsukade Bunyo、Morokuma-Matsui Kana、Hayashi Masao、Tominaga Nozomu、Tamura Yoichi、Niinuma Kotaro、Motogi Kazuhiro、Morokuma Tomoki、Matsuda Yuichi
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 72 Pages: 6-6
  • DOI: 10.1093/pasj/psaa052
  • Peer Reviewed / Open Access
• [Journal Article] Observations of V404 Cygni during the 2015 outburst by the Nasu telescope array at 1.4 GHz (2020)
  • Author(s): Asuma Kuniyuki、Niinuma Kotaro、Takefuji Kazuhiro、Aoki Takahiro、Kida Sumiko、Nakajima Hirochika、Tsubono Kimio、Daishido Tsuneaki
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 72 Pages: 77-77
  • DOI: 10.1093/pasj/psaa066
  • Peer Reviewed
• [Journal Article] SYMBA: An end-to-end VLBI synthetic data generation pipeline (2020)
  • Author(s): Roelofs F.、Janssen M.、Natarajan I.、Deane R.、Davelaar J.、Olivares H.、Porth O.、Paine S. N.、Bouman K. L.、Tilanus R. P. J.、van Bemmel I. M.、Falcke H.、Kawashima T.、 et al.
  • Journal Title: Astronomy & Astrophysics Volume: 636
  • DOI: 10.1051/0004-6361/201936622
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Constraints on the Circumnuclear Disk through Free-Free Absorption in the Nucleus of 3C 84 with KaVA and KVN at 43 and 86 GHz (2020)
  • Author(s): Wajima, Kiyoaki; Kino, Motoki; Kawakatu, Nozomu
  • Journal Title: The Astrophysical Journal Volume: 895 Pages: 35-35
  • DOI: 10.3847/1538-4357/ab88a0
  • Peer Reviewed / Open Access
• [Journal Article] THEMIS: A Parameter Estimation Framework for the Event Horizon Telescope (2020)
  • Author(s): Broderick Avery E. et al. including Hiroshi Nagai
  • Journal Title: The Astrophysical Journal Volume: 897 Pages: 139-139
  • DOI: 10.3847/1538-4357/ab91a4
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Verification of Radiative Transfer Schemes for the EHT (2020)
  • Author(s): Gold Roman et al. including Hiroshi Nagai
  • Journal Title: The Astrophysical Journal Volume: 897 Pages: 148-148
  • DOI: 10.3847/1538-4357/ab96c6
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Event Horizon Telescope imaging of the archetypal blazar 3C 279 at an extreme 20 microarcsecond resolution (2020)
  • Author(s): Kim Jae-Young et al. including Hiroshi Nagai
  • Journal Title: Astronomy & Astrophysics Volume: 640
  • DOI: 10.1051/0004-6361/202037493
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Herschel SPIRE Discovery of Far-infrared Excess Synchrotron Emission from the West Hot Spot of the Radio Galaxy Pictor A (2020)
  • Author(s): Isobe Naoki、Sunada Yuji、Kino Motoki、Koyama Shoko、Tashiro Makoto、Nagai Hiroshi、Pearson Chris
  • Journal Title: The Astrophysical Journal Volume: 899 Pages: 17-17
  • DOI: 10.3847/1538-4357/ab9d1c
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] The radio-loud narrow-line Seyfert 1 galaxy 1H 0323+342 in a galaxy merger (2020)
  • Author(s): Doi, Akihiro; Kino, Motoki; Kawakatu, Nozomu; Hada, Kazuhiro
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 496 Pages: 1757-1765
  • DOI: 10.1093/mnras/staa1525
  • Peer Reviewed / Open Access
• [Journal Article] Monitoring the Morphology of M87* in 2009-2017 with the Event Horizon Telescope (2020)
  • Author(s): Wielgus Maciek et al. including Hiroshi Nagai
  • Journal Title: Astrophysical Journal Volume: 901 Pages: 67-67
  • DOI: 10.3847/1538-4357/abac0d
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Interferometric Monitoring of Gamma-Ray Bright AGNs: OJ 287 (2020)
  • Author(s): Lee Jee Won、Lee Sang-Sung、Algaba Juan-Carlos、Hodgson Jeffrey、Kim Jae-Young、Park Jongho、Kino Motoki、Kim Dae-Won、Kang Sincheol、Yoo Sungmin、Kim Sang Hyun、Gurwell Mark
  • Journal Title: The Astrophysical Journal Volume: 902 Pages: 104-104
  • DOI: 10.3847/1538-4357/abb4e5
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Gravitational Test beyond the First Post-Newtonian Order with the Shadow of the M87 Black Hole (2020)
  • Author(s): Psaltis Dimitrios et al. including Hiroshi Nagai
  • Journal Title: Physical Review Letters Volume: 125 Pages: 1104-1104
  • DOI: 10.1103/physrevlett.125.141104
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Jet kinematics of the quasar 4C+21.35 from observations with the KaVA very long baseline interferometry array (2019)
  • Author(s): Lee Taeseok、Trippe Sascha、Kino Motoki et al.
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 486 Pages: 2412-2421
  • DOI: 10.1093/mnras/stz970
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] ALMA Observations of Molecular Gas in the Host Galaxy of AT2018cow (2019)
  • Author(s): Morokuma-Matsui Kana、Morokuma Tomoki、Tominaga Nozomu、Hatsukade Bunyo、Hayashi Masao、Tamura Yoichi、Matsuda Yuichi、Motogi Kazuhito、Niinuma Kotaro、Konishi Masahiro
  • Journal Title: The Astrophysical Journal Letters, Volume 879, Issue 1, article id. L13, 6 pp. (2019). Volume: 879
  • DOI: 10.3847/2041-8213/ab2915
  • Peer Reviewed / Open Access
• [Journal Article] Stable Radio Core of the Blazar Mrk 501 during High-energy Active State in 2012 (2019)
  • Author(s): Koyama Shoko、Kino Motoki、Doi Akihiro、Niinuma Kotaro、Giroletti Marcello、Paneque David、Akiyama Kazunori、Giovannini Gabriele、Zhao Guang-Yao、Ros Eduardo、Kataoka Jun、Orienti Monica、Hada Kazuhiro、Nagai Hiroshi、Isobe Naoki、Kobayashi Hideyuki、Honma Mareki、Lico Rocco
  • Journal Title: The Astrophysical Journal Volume: 884 Pages: 132-132
  • DOI: 10.3847/1538-4357/ab4260
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Kinematics of the M87 Jet in the Collimation Zone: Gradual Acceleration and Velocity Stratification (2019)
  • Author(s): Park Jongho、 Hada Kazuhiro、Kino Motoki et al.
  • Journal Title: The Astrophysical Journal Volume: 887 Pages: 147-147
  • DOI: 10.3847/1538-4357/ab5584
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Exploring the Morphology and Origins of the 4C 38.41 Jet (2019)
  • Author(s): Algaba J. C.、Rani B.、Lee S. S.、Kino M.、Park Jongho、Kim Jae-Young
  • Journal Title: The Astrophysical Journal Volume: 886 Pages: 85-85
  • DOI: 10.3847/1538-4357/ab4b45
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole (2019)
  • Author(s): The Event Horizon Telescope Collaboration、Kawashima Tomohisa、 et al.
  • Journal Title: The Astrophysical Journal Volume: 875
  • DOI: 10.3847/2041-8213/ab0ec7
  • NAID: 120006764486
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] First M87 Event Horizon Telescope Results. II. Array and Instrumentation (2019)
  • Author(s): The Event Horizon Telescope Collaboration、Kawashima Tomohisa、 et al.
  • Journal Title: The Astrophysical Journal Volume: 875
  • DOI: 10.3847/2041-8213/ab0c96
  • NAID: 120006764487
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] First M87 Event Horizon Telescope Results. III. Data Processing and Calibration (2019)
  • Author(s): The Event Horizon Telescope Collaboration、Kawashima Tomohisa、 et al.
  • Journal Title: The Astrophysical Journal Letters Volume: 875
  • DOI: 10.3847/2041-8213/ab0c57
  • NAID: 120006764488
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] First M87 Event Horizon Telescope Results. IV. Imaging the Central Supermassive Black Hole (2019)
  • Author(s): The Event Horizon Telescope Collaboration、Kawashima Tomohisa、 et al.
  • Journal Title: The Astrophysical Journal Letters Volume: 875
  • DOI: 10.3847/2041-8213/ab0e85
  • NAID: 120006764489
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] First M87 Event Horizon Telescope Results. V. Physical Origin of the Asymmetric Ring (2019)
  • Author(s): The Event Horizon Telescope Collaboration、Kawashima Tomohisa、 et al.
  • Journal Title: The Astrophysical Journal Letters Volume: 875
  • DOI: 10.3847/2041-8213/ab0f43
  • NAID: 120006764490
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] First M87 Event Horizon Telescope Results. VI. The Shadow and Mass of the Central Black Hole (2019)
  • Author(s): The Event Horizon Telescope Collaboration、Kawashima Tomohisa、 et al.
  • Journal Title: The Astrophysical Journal Letters Volume: 875
  • DOI: 10.3847/2041-8213/ab1141
  • NAID: 120006764491
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Faraday Rotation in the Jet of M87 inside the Bondi Radius: Indication of Winds from Hot Accretion Flows Confining the Relativistic Jet (2019)
  • Author(s): Park Jongho、Hada Kazuhiro、Kino Motoki、Nakamura Masanori、Ro Hyunwook、Trippe Sascha
  • Journal Title: The Astrophysical Journal Volume: 871 Pages: 257-257
  • DOI: 10.3847/1538-4357/aaf9a9
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] The Size, Shape, and Scattering of Sagittarius A* at 86 GHz: First VLBI with ALMA (2019)
  • Author(s): Issaoun S.、Johnson M. D.、Blackburn L. et al.
  • Journal Title: The Astrophysical Journal Volume: 871 Pages: 30-30
  • DOI: 10.3847/1538-4357/aaf732
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Ejection of Double knots from the radio core of PKS 1510--089 during the strong gamma-ray flares in 2015 (2019)
  • Author(s): Park Jongho、Lee Sang-Sung、Kim Jae-Young、Hodgson Jeffrey A.、Trippe Sascha、Kim Dae-Won、Algaba Juan-Carlos、Kino Motoki、Zhao Guang-Yao、Lee Jee Won、Gurwell Mark A.
  • Journal Title: The Astrophysical Journal Volume: -
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Evidence of Jet?Clump Interaction: A Flip of the Radio Jet Head of 3C 84 (2018)
  • Author(s): Kino M.、Wajima K.、Kawakatu N.、Nagai H.、Orienti M.、Giovannini G.、Hada K.、Niinuma K.、Giroletti M.
  • Journal Title: The Astrophysical Journal Volume: 864 Pages: 118-118
  • DOI: 10.3847/1538-4357/aad6e3
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Parabolic Jets from the Spinning Black Hole in M87 (2018)
  • 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 Pages: 146-146
  • DOI: 10.3847/1538-4357/aaeb2d
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Fast-spinning Black Holes Inferred from Symmetrically Limb-brightened Radio Jets (2018)
  • Author(s): Takahashi Kazuya、Toma Kenji、Kino Motoki、Nakamura Masanori、Hada Kazuhiro
  • Journal Title: The Astrophysical Journal Volume: 868 Pages: 82-82
  • DOI: 10.3847/1538-4357/aae832
  • Peer Reviewed / Int'l Joint Research
• [Presentation] Synergy between Japanese VLBI Network and high-energy astrophysics in the Era of Multi-Messenger Astronomy (2022)
  • Author(s): Kotaro Niinuma
  • Organizer: The extreme Universe viewed in very-high-energy gamma rays 2021
  • Int'l Joint Research / Invited
• [Presentation] Slow Radio Transients in the SKA era (2021)
  • Author(s): Kotaro Niinuma
  • Organizer: East Asia SKA Workshop 2021
  • Int'l Joint Research / Invited
• [Presentation] EAVN AGNサイエンスワーキンググループ活動報告 (2021)
  • Author(s): 紀 基樹
  • Organizer: VLBI懇談会シンポジウム2021
• [Presentation] 86 GHz 帯日韓VLBI観測網確立に向けた偏波変換プログラムの開発 (2021)
  • Author(s): 辻本 未稀
  • Organizer: VLBI懇談会シンポジウム2021
• [Presentation] 野辺山 45m 電波望遠鏡における 3 帯域同時 VLBI 観測システム構築と試験観測 (2021)
  • Author(s): 堤稔喜、ほか
  • Organizer: 2021年日本天文学会春季年会
• [Presentation] Introduction of millimeter wave VLBI and proposal of applied technology to space VLBI (2021)
  • Author(s): Nozomi Okada
  • Organizer: The 13th East Asian VLBI Workshop 2021
  • Int'l Joint Research / Invited
• [Presentation] Activity report of EAVN AGN Science Working Group (2021)
  • Author(s): Motoki Kino
  • Organizer: The 13th East Asian VLBI Workshop 2021
  • Int'l Joint Research
• [Presentation] Construction and evaluation tests of simultaneous triple-band VLBI observing system on the Nobeyama 45-m telescope (2021)
  • Author(s): Toshihisa Tsutsumi
  • Organizer: The 13th East Asian VLBI Workshop 2021
  • Int'l Joint Research
• [Presentation] Construction and test observation of a simultaneous 3-band VLBI observing system on the Nobeyama 45-m telescope (2021)
  • Author(s): Toshihisa Tsutsumi
  • Organizer: ALMA/45m/ASTE Users Meeting 2020
  • Int'l Joint Research
• [Presentation] Conversion of mixed-polarization VLBI visibilities for the NRO 3-mm VLBI obseravtions (2021)
  • Author(s): Satoko Sawada-Satoh
  • Organizer: ALMA/45m/ASTE Users Meeting 2020
  • Int'l Joint Research
• [Presentation] Development of NRO 3mm VLBI system: Toward EA 3mm VLBI Network (2020)
  • Author(s): Kotaro Niinuma
  • Organizer: AGN Jet Workshop 2020 "Active Galactic Nucleus Jets in the Event Horizon Telescope Era"
  • Int'l Joint Research / Invited
• [Presentation] Development of NRO 3mm VLBI system (2019)
  • Author(s): Kotaro Niinuma
  • Organizer: East Asia To Itary Nearly Global (Eating) VLBI Workshop 2019
  • Int'l Joint Research
• [Presentation] Radio follow-up with Japanese VLBI Network and East Asia VLBI Network (2019)
  • Author(s): Kotaro Niinuma
  • Organizer: The sixth Astrophysical Multimessenger Observatory Network (AMON) Workshop
  • Int'l Joint Research / Invited
• [Presentation] SKA時代の突発天体研究 (2019)
  • Author(s): 新沼浩太郎
  • Organizer: SKA-Japanシンポジウム
  • Invited
• [Presentation] Development of NRO 3mm VLBI system (2019)
  • Author(s): Kotaro Niinuma
  • Organizer: Eating VLBI workshop 2019, "East Asia To Italy: Nearly Global VLBI"
  • Int'l Joint Research
• [Presentation] 電波銀河 3C84 の中心 1 パーセクの遮蔽構造の非一様性 (2018)
  • Author(s): 川勝望，紀基樹，輪島清昭, 新沼浩太郎, 和田桂一，澤田-佐藤聡子
  • Organizer: 日本天文学会2018年秋季年会
• [Presentation] Measuring velocity field of AGN jet at <100Rs - 10000Rs by NRO45m+KaVA mm-VLBI observation (2018)
  • Author(s): Kotaro Niinuma
  • Organizer: 2018 ALMA/45m/ASTE Users Meeting
  • Int'l Joint Research