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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

Research Project

Project/Area Number 18H03721
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Review Section Medium-sized Section 16:Astronomy and related fields
Research InstitutionYamaguchi 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 *help
¥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。

Report

(4 results)
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • 2018 Annual Research Report

Research Products

(70 results)

All 2022 2021 2020 2019 2018 Other

All Int'l Joint Research (6 results) Journal Article (47 results) (of which Int'l Joint Research: 41 results,  Peer Reviewed: 47 results,  Open Access: 24 results) Presentation (17 results) (of which Int'l Joint Research: 12 results,  Invited: 6 results)

  • [Int'l Joint Research] 韓国天文研究院(韓国)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] 韓国天文研究院(韓国)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] 国立ソウル大学/韓国天文宇宙科学研究院(韓国)

    • Related Report
      2019 Annual Research Report
  • [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)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] The Istituto di Radioastronomia/INAF(イタリア)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] Max-Planck Institute for Radio Astronomy(ドイツ)

    • Related Report
      2019 Annual Research Report
  • [Journal Article] The Intrinsic Structure of Sagittarius A* at 1.3 cm and 7 mm2022

    • 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

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] The Variability of the Black Hole Image in M87 at the Dynamical Timescale2022

    • 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

    • Related Report
      2021 Annual Research Report
    • 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 A2022

    • 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

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Broadband Multi-wavelength Properties of M87 during the 2017 Event Horizon Telescope Campaign2021

    • Author(s)
      EHT Multi-wavelength Science Working Group et al.
    • Journal Title

      Astrophysical Journal Letters

      Volume: 911

    • DOI

      10.3847/2041-8213/abef71

    • Related Report
      2021 Annual Research Report
    • 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 Collision2021

    • 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

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] East Asian VLBI Network observations of active galactic nuclei jets: imaging with KaVA+Tianma+Nanshan2021

    • 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

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] The Polarized Image of a Synchrotron-emitting Ring of Gas Orbiting a Black Hole2021

    • 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

    • Related Report
      2021 Annual Research Report
    • 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

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Persistent Non-Gaussian Structure in the Image of Sagittarius A* at 86 GHz2021

    • 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

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Event Horizon Telescope observations of the jet launching and collimation in Centaurus A2021

    • 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

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Relativistic jet acceleration region in a black hole magnetosphere2021

    • Author(s)
      Takahashi Masaaki、Kino Motoki、Pu Hung-Yi
    • Journal Title

      Physical Review D

      Volume: 104

    • DOI

      10.1103/physrevd.104.103004

    • Related Report
      2021 Annual Research Report
    • 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 mm2021

    • 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

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Jet Collimation and Acceleration in the Giant Radio Galaxy NGC 3152021

    • 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

    • Related Report
      2020 Annual Research Report
    • 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

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] First M87 Event Horizon Telescope Results. VII. Polarization of the Ring2021

    • Author(s)
      Akiyama Kazunori et al. including Hiroshi Nagai
    • Journal Title

      Astrophysical Jounal Letters

      Volume: 910

    • DOI

      10.3847/2041-8213/abe71d

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] First M87 Event Horizon Telescope Results. VIII. Magnetic Field Structure near The Event Horizon2021

    • Author(s)
      Event Horizon Telescope Collaboration
    • Journal Title

      Astrophysical Jounal Letters

      Volume: 910

    • DOI

      10.3847/2041-8213/abe4de

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Polarimetric Properties of Event Horizon Telescope Targets from ALMA2021

    • Author(s)
      Goddi Ciriaco et al.
    • Journal Title

      The Astrophysical Journal Letters

      Volume: 910

    • DOI

      10.3847/2041-8213/abee6a

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Millimeter-VLBI Detection and Imaging of the Gravitationally Lensed γ-Ray Blazar JVAS B0218+3572020

    • 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

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Spatially resolved molecular gas properties of host galaxy of Type I superluminous supernova SN?2017egm2020

    • 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

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Observations of V404 Cygni during the 2015 outburst by the Nasu telescope array at 1.4 GHz2020

    • 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

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] SYMBA: An end-to-end VLBI synthetic data generation pipeline2020

    • 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

    • Related Report
      2020 Annual Research Report
    • 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 GHz2020

    • Author(s)
      Wajima, Kiyoaki; Kino, Motoki; Kawakatu, Nozomu
    • Journal Title

      The Astrophysical Journal

      Volume: 895 Pages: 35-35

    • DOI

      10.3847/1538-4357/ab88a0

    • Related Report
      2020 Annual Research Report 2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] THEMIS: A Parameter Estimation Framework for the Event Horizon Telescope2020

    • 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

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Verification of Radiative Transfer Schemes for the EHT2020

    • 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

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Event Horizon Telescope imaging of the archetypal blazar 3C 279 at an extreme 20 microarcsecond resolution2020

    • Author(s)
      Kim Jae-Young et al. including Hiroshi Nagai
    • Journal Title

      Astronomy & Astrophysics

      Volume: 640

    • DOI

      10.1051/0004-6361/202037493

    • Related Report
      2020 Annual Research Report
    • 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 A2020

    • 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

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] The radio-loud narrow-line Seyfert 1 galaxy 1H 0323+342 in a galaxy merger2020

    • 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

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Monitoring the Morphology of M87* in 2009-2017 with the Event Horizon Telescope2020

    • Author(s)
      Wielgus Maciek et al. including Hiroshi Nagai
    • Journal Title

      Astrophysical Journal

      Volume: 901 Pages: 67-67

    • DOI

      10.3847/1538-4357/abac0d

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Interferometric Monitoring of Gamma-Ray Bright AGNs: OJ 2872020

    • 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

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Gravitational Test beyond the First Post-Newtonian Order with the Shadow of the M87 Black Hole2020

    • 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

    • Related Report
      2020 Annual Research Report
    • 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 array2019

    • 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

    • Related Report
      2019 Annual Research Report 2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] ALMA Observations of Molecular Gas in the Host Galaxy of AT2018cow2019

    • 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

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Stable Radio Core of the Blazar Mrk 501 during High-energy Active State in 20122019

    • 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

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Kinematics of the M87 Jet in the Collimation Zone: Gradual Acceleration and Velocity Stratification2019

    • 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

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Exploring the Morphology and Origins of the 4C 38.41 Jet2019

    • 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

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

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

      The Astrophysical Journal

      Volume: 875

    • DOI

      10.3847/2041-8213/ab0ec7

    • NAID

      120006764486

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] First M87 Event Horizon Telescope Results. II. Array and Instrumentation2019

    • 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

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] First M87 Event Horizon Telescope Results. III. Data Processing and Calibration2019

    • 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

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] First M87 Event Horizon Telescope Results. IV. Imaging the Central Supermassive Black Hole2019

    • 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

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] First M87 Event Horizon Telescope Results. V. Physical Origin of the Asymmetric Ring2019

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

      The Astrophysical Journal Letters

      Volume: 875

    • DOI

      10.3847/2041-8213/ab0f43

    • NAID

      120006764490

    • Related Report
      2018 Annual Research Report
    • 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 Hole2019

    • 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

    • Related Report
      2018 Annual Research Report
    • 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 Jet2019

    • 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

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] The Size, Shape, and Scattering of Sagittarius A* at 86 GHz: First VLBI with ALMA2019

    • 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

    • Related Report
      2018 Annual Research Report
    • 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 20152019

    • 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: -

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Evidence of Jet?Clump Interaction: A Flip of the Radio Jet Head of 3C 842018

    • 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

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Parabolic Jets from the Spinning Black Hole in M872018

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

      The Astrophysical Journal

      Volume: 868 Pages: 146-146

    • DOI

      10.3847/1538-4357/aaeb2d

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Fast-spinning Black Holes Inferred from Symmetrically Limb-brightened Radio Jets2018

    • 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

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Synergy between Japanese VLBI Network and high-energy astrophysics in the Era of Multi-Messenger Astronomy2022

    • Author(s)
      Kotaro Niinuma
    • Organizer
      The extreme Universe viewed in very-high-energy gamma rays 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Slow Radio Transients in the SKA era2021

    • Author(s)
      Kotaro Niinuma
    • Organizer
      East Asia SKA Workshop 2021
    • Related Report
      2021 Annual Research Report
    • 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
    • Related Report
      2021 Annual Research Report
  • [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
    • Related Report
      2021 Annual Research Report
  • [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
    • Related Report
      2020 Annual Research Report
  • [Presentation] Introduction of millimeter wave VLBI and proposal of applied technology to space VLBI2021

    • Author(s)
      Nozomi Okada
    • Organizer
      The 13th East Asian VLBI Workshop 2021
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Activity report of EAVN AGN Science Working Group2021

    • Author(s)
      Motoki Kino
    • Organizer
      The 13th East Asian VLBI Workshop 2021
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Construction and evaluation tests of simultaneous triple-band VLBI observing system on the Nobeyama 45-m telescope2021

    • Author(s)
      Toshihisa Tsutsumi
    • Organizer
      The 13th East Asian VLBI Workshop 2021
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Construction and test observation of a simultaneous 3-band VLBI observing system on the Nobeyama 45-m telescope2021

    • Author(s)
      Toshihisa Tsutsumi
    • Organizer
      ALMA/45m/ASTE Users Meeting 2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Conversion of mixed-polarization VLBI visibilities for the NRO 3-mm VLBI obseravtions2021

    • Author(s)
      Satoko Sawada-Satoh
    • Organizer
      ALMA/45m/ASTE Users Meeting 2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Development of NRO 3mm VLBI system: Toward EA 3mm VLBI Network2020

    • Author(s)
      Kotaro Niinuma
    • Organizer
      AGN Jet Workshop 2020 "Active Galactic Nucleus Jets in the Event Horizon Telescope Era"
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Development of NRO 3mm VLBI system2019

    • Author(s)
      Kotaro Niinuma
    • Organizer
      East Asia To Itary Nearly Global (Eating) VLBI Workshop 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Radio follow-up with Japanese VLBI Network and East Asia VLBI Network2019

    • Author(s)
      Kotaro Niinuma
    • Organizer
      The sixth Astrophysical Multimessenger Observatory Network (AMON) Workshop
    • Related Report
      2019 Annual Research Report 2018 Annual Research Report
    • 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
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] Development of NRO 3mm VLBI system2019

    • Author(s)
      Kotaro Niinuma
    • Organizer
      Eating VLBI workshop 2019, "East Asia To Italy: Nearly Global VLBI"
    • Related Report
      2018 Annual Research Report
    • 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
    • Related Report
      2018 Annual Research Report
  • [Presentation] Measuring velocity field of AGN jet at <100Rs - 10000Rs by NRO45m+KaVA mm-VLBI observation2018

    • Author(s)
      Kotaro Niinuma
    • Organizer
      2018 ALMA/45m/ASTE Users Meeting
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research

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Published: 2018-04-23   Modified: 2022-12-28  

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