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NAGAI HIROSHI  永井 洋

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NAGAI Hiroshi  永井 洋

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Researcher Number 00455198
Other IDs
Affiliation (Current) 2019: 国立天文台, アルマプロジェクト, 特任准教授
Affiliation (based on the past Project Information) *help 2014 – 2018: 国立天文台, チリ観測所, 特任准教授
2014 – 2016: 国立天文台, チリ観測所, 准教授
2013: 国立天文台, チリ観測所, 助教
2012: 国立天文台, チリ観測所, 特任助教
2012: 国立天文台, チリ観測所, 研究員 … More
2011: 国立天文台, ALMA推進室, 研究員
2010: 独立行政法人宇宙航空研究開発機構, 宇宙科学研究所, 研究員
2009: 国立天文台, VSOP-2推進室, 研究員 Less
Review Section/Research Field
Principal Investigator
Astronomy / Basic Section 16010:Astronomy-related
Except Principal Investigator
Astronomy
Keywords
Principal Investigator
活動銀河核 / ALMA / ブラックホール降着流 / ブラックホール質量降着流 / 電波観測 / VLBI / アルマ / 偏波観測 / 超巨大ブラックホール / 質量降着現象 / ミリ波サブミリ波偏波観測 … More
Except Principal Investigator
… More ブラックホール / VLBI / 電波 / 活動銀河核 / ジェット / 銀河 / 電波天文学 / アウトフロー / 天文 / 観測技術 / 活動銀河 / 天文学 / 干渉計 / 電波干渉計 / 位相補償 / 降着円盤 / 位置天文学 / 位置天文 / 相対論的ジェット / 韓国: イタリア / 韓国:イタリア / 活動銀河中心核 / 超長基線電波干渉計 / サブミリ波 / イメージング / 国際情報交換:アメリカ合衆国 / 国際情報交換(米国) Less
  • Research Projects

    (6 results)
  • Research Products

    (78 results)
  • Co-Researchers

    (25 People)
  •  銀河団からブラックホールに至る冷たいガスの流れとAGNの活動性の研究Principal InvestigatorOngoing

    • Principal Investigator
      永井 洋
    • Project Period (FY)
      2018 – 2020
    • Research Category
      Grant-in-Aid for Scientific Research (C)
    • Review Section
      Basic Section 16010:Astronomy-related
    • Research Institution
      National Astronomical Observatory of Japan
  •  ALMA偏波観測で明らかにする低光度活動銀河核のブラックホール降着流Principal InvestigatorOngoing

    • Principal Investigator
      永井 洋
    • Project Period (FY)
      2015 – 2018
    • Research Category
      Grant-in-Aid for Young Scientists (B)
    • Research Field
      Astronomy
    • Research Institution
      National Astronomical Observatory of Japan
  •  Precise measurements of black holes for studies of active galactic nuclei

    • Principal Investigator
      DOI AKIHIRO
    • Project Period (FY)
      2012 – 2016
    • Research Category
      Grant-in-Aid for Scientific Research (B)
    • Research Field
      Astronomy
    • Research Institution
      Japan Aerospace EXploration Agency
  •  日韓VLBI網で探る巨大ブラックホールからの相対論的ジェット噴流

    • Principal Investigator
      紀 基樹
    • Project Period (FY)
      2012 – 2013
    • Research Category
      Grant-in-Aid for Scientific Research (C)
    • Research Field
      Astronomy
    • Research Institution
      Japan Aerospace Exploration Agency
  •  Development of new imaging tehchnique for sub-mm VLBI

    • Principal Investigator
      HONMA Mareki
    • Project Period (FY)
      2012 – 2014
    • Research Category
      Grant-in-Aid for Scientific Research (C)
    • Research Field
      Astronomy
    • Research Institution
      National Astronomical Observatory of Japan
  •  Observational Studies of the active galactic nuclei with rapidly growing black holes by direct imaging using VLBI

    • Principal Investigator
      DOI Akihiro
    • Project Period (FY)
      2009 – 2011
    • Research Category
      Grant-in-Aid for Scientific Research (C)
    • Research Field
      Astronomy
    • Research Institution
      Japan Aerospace Exploration Agency

All 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 Other

All Journal Article Presentation

  • [Journal Article] A wide and collimated radio jet in 3C84 on the scale of a few hundred gravitational radii2018

    • Author(s)
      Giovannini G.、Savolainen T.、Orienti M.、Nakamura M.、Nagai H.、Kino M.、Giroletti M.、Hada K.、Bruni G.、Kovalev Y. Y.、Anderson J. M.、D’Ammando F.、Hodgson J.、Honma M.、Krichbaum T. P.、Lee S.-S.、Lico R.、Lisakov M. M.、Lobanov A. P.、et al.
    • Journal Title

      Nature Astronomy

      Volume: N/A

    • DOI
      10.1038/s41550-018-0431-2
    • Peer Reviewed / Open Access / Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-15K17619, KAKENHI-PLANNED-25120007, KAKENHI-INTERNATIONAL-15K21718
  • [Journal Article] Discovery of a new subparsec counterjet in NGC 1275: the inclination angle and the environment2017

    • Author(s)
      Y. Fujita, & H. Nagai
    • Journal Title

      Monthly Notices of the Royal Astronomical Society: Letters

      Volume: 465

    • DOI
      10.1093/mnrasl/slw217
    • Peer Reviewed / Acknowledgement Compliant
    • Data Source
      KAKENHI-PROJECT-15K05080, KAKENHI-PROJECT-15K17619
  • [Journal Article] Enhanced Polarized Emission from the One-parsec-scale Hotspot of 3C 84 as a Result of the Interaction with the Clumpy Ambient Medium2017

    • Author(s)
      Nagai H.、Fujita Y.、Nakamura M.、Orienti M.、Kino M.、Asada K.、Giovannini G.
    • Journal Title

      The Astrophysical Journal

      Volume: 849 Pages: 52-52

    • DOI
      10.3847/1538-4357/aa8e43
    • Peer Reviewed / Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-15K17619, KAKENHI-PROJECT-15K05080
  • [Journal Article] Submillimeter Polarization Observation of the Protoplanetary Disk around HD 1425272016

    • Author(s)
      Kataoka, A., Tsukagoshi, T., Momose, M., Nagai, H., Muto, T., Dullemond, C. P., Pohl, A., Fukagawa, M., Shibai, H., Hanawa, T., & Murakawa, K.
    • Journal Title

      The Astrophysical Journal

      Volume: 831 Pages: 6-12

    • DOI
      10.3847/2041-8205/831/2/l12
    • Peer Reviewed / Open Access / Acknowledgement Compliant / Int'l Joint Research
    • Data Source
      KAKENHI-PLANNED-23103004, KAKENHI-WRAPUP-16H01702, KAKENHI-PROJECT-15K05017, KAKENHI-PROJECT-15K17606, KAKENHI-PROJECT-15K17619, KAKENHI-PROJECT-26800106
  • [Journal Article] Discovery of off-axis jet structure of TeV blazar Mrk 501 with mm-VLBI2016

    • Author(s)
      Koyama, S., Kino, M., Giroletti, M., Doi, A., Giovannini, G., Orienti, M., Hada, K., Ros, E., Niinuma, K., Nagai, H., Savolainen, T., Krichbaum, T. P., Perez-Torres, M. A.
    • Journal Title

      Astronomy & Astrophysics

      Volume: 586 Pages: 113-122

    • DOI
      10.1051/0004-6361/201526541
    • Peer Reviewed / Acknowledgement Compliant / Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-26800109, KAKENHI-PROJECT-13J03094, KAKENHI-PROJECT-24340042
  • [Journal Article] Nature of radio feature formed by re-started jet activity in 3C 84 and its relation with γ-ray emissions2016

    • Author(s)
      Nagai, H., Chida, H., Kino, M., Orienti, M., D'Ammando, F., Giovannini, G., Hiura, K.
    • Journal Title

      Astronomische Nachrichten

      Volume: 337 Pages: 69-69

    • DOI
      10.1002/asna.201512267
    • Peer Reviewed / Acknowledgement Compliant / Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-15K17619, KAKENHI-PROJECT-24340042
  • [Journal Article] High-sensitivity 86 GHz (3.5 mm) VLBI Observations of M87: Deep Imaging of the Jet Base at a Resolution of 10 Schwarzschild Radii2016

    • Author(s)
      Hada, K., Kino, M., Doi, A., Nagai, H., Honma, M., Akiyama, K., Tazaki, F., Lico, R., Giroletti, M., Giovannini, G., Orienti, M., Hagiwara, Y.,
    • Journal Title

      The Astrophysical Journal

      Volume: 817 Pages: 131-147

    • DOI
      10.3847/0004-637x/817/2/131
    • Peer Reviewed / Acknowledgement Compliant / Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-26800109, KAKENHI-PROJECT-13J03094, KAKENHI-PROJECT-24340042, KAKENHI-PLANNED-25120007
  • [Journal Article] Fossil shell emission in dying radio loud AGNs2016

    • Author(s)
      Kino, Motoki, Ito, Hirotaka, Kawakatu, Nsonomu, Orienti, Monica, Nagai, Hiroshi, Wajima, Kiyoaki, Itoh, Ryo
    • Journal Title

      Astronomische Nachrichten

      Volume: 337 Pages: 47-47

    • DOI
      10.1002/asna.201512263
    • Peer Reviewed / Acknowledgement Compliant / Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-25800099, KAKENHI-PROJECT-24340042
  • [Journal Article] ALMA Science Verification Data: Millimeter Continuum Polarimetry of the Bright Radio Quasar 3C 2862016

    • Author(s)
      Nagai, H., Nakanishi, K., Paladino, R., Hull, C. L. H., Cortes, P., Moellenbrock, G., Fomalont, E., Asada, K., Hada, K.
    • Journal Title

      Astrophysical Journal

      Volume: 未定

    • Acknowledgement Compliant / Peer Reviewed / Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-15K17619
  • [Journal Article] ALMA Science Verification Data: Millimeter Continuum Polarimetry of the Bright Radio Quasar 3C 2862016

    • Author(s)
      Nagai, H., Nakanishi, K., Paladino, R., Hull, C. L. H., Cortes, P., Moellenbrock, G., Fomalont, E., Asada, K., Hada, K.
    • Journal Title

      The Astrophysical Journal

      Volume: 824 Pages: 132-141

    • DOI
      10.3847/0004-637x/824/2/132
    • Peer Reviewed / Acknowledgement Compliant / Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-26800109, KAKENHI-PROJECT-15K17619
  • [Journal Article] Discovery of a Wandering Radio Jet Base after a Large X-Ray Flare in the Blazar Markarian 4212015

    • Author(s)
      Niinuma, K., Kino, M., Doi, A., Hada, K., Nagai, H., Koyama, S.
    • Journal Title

      The Astrophysical Journal Letters

      Volume: 807 Pages: 14-18

    • DOI
      10.1088/2041-8205/807/1/l14
    • Peer Reviewed / Acknowledgement Compliant / Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-26800109, KAKENHI-PROJECT-13J03094, KAKENHI-PROJECT-24340042
  • [Journal Article] Probing the precise location of the radio core in the TeV blazar Mrk 501 with VERA at 43 GHz2015

    • Author(s)
      Koyama, Shoko; Kino, Motoki; Doi, Akihiro; Niinuma, Kotaro; Hada, Kazuhiro; Nagai, Hiroshi; Honma, Mareki; Akiyama, Kazunori; Giroletti, Marcello; Giovannini, Gabriele; Orienti, Monica; Isobe, Naoki; Kataoka, Jun; Paneque, David; Kobayashi, Hideyuki; Asada, Keiichi
    • Journal Title

      Publications of the Astronomical Society of japan

      Volume: 未定

    • DOI
      10.1093/pasj/psu144
    • Peer Reviewed / Acknowledgement Compliant
    • Data Source
      KAKENHI-PROJECT-12J07566, KAKENHI-PROJECT-13J03094, KAKENHI-PROJECT-26800109, KAKENHI-PLANNED-25120007, KAKENHI-PROJECT-24340042
  • [Journal Article] VLBI observations of bright AGN jets with the KVN and VERA Array (KaVA): Evaluation of imaging capability2015

    • Author(s)
      Niinuma, Kotaro; Lee, Sang-Sung; Kino, Motoki; Sohn, Bong Won; Akiyama, Kazunori et al.
    • Journal Title

      Publications of the Astronomical Society of japan

      Volume: 66 Pages: 103-118

    • DOI
      10.1093/pasj/psu104
    • Peer Reviewed / Open Access / Acknowledgement Compliant
    • Data Source
      KAKENHI-PROJECT-12J07566, KAKENHI-PROJECT-13J03094, KAKENHI-PROJECT-24340042, KAKENHI-PROJECT-24540242, KAKENHI-PROJECT-26800109, KAKENHI-PLANNED-25120007
  • [Journal Article] Apparent Inward Motion of the Parsec-Scale Jet in the BL Lac Object OJ287 during the 2011-2012 γ-ray Flares2015

    • Author(s)
      Sawada-Satoh, S.; Akiyama, K.; Niinuma, K.; Nagai, H.; Kino, M.; D'Ammando, F.; Koyama, S.; Hada, K.; Orienti, M.; Honma, M.; Shibata, K. M.
    • Journal Title

      Publications of The Korean Astronomical Society

      Volume: 30 Pages: 429-432

    • DOI
      10.5303/pkas.2015.30.2.429
    • Peer Reviewed / Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-24340042
  • [Journal Article] 230 GHz VLBI Observations of M87: Event-horizon-scale Structure during an Enhanced Very-high-energy γ-Ray State in 20122015

    • Author(s)
      Akiyama, K., Lu, R.-S, Fish, V. L., Doeleman, S. S., Broderick, A. E., Dexter, J., Hada, K. and 41 co-authors
    • Journal Title

      The Astrophysical Journal

      Volume: 807 Pages: 150-160

    • DOI
      10.1088/0004-637x/807/2/150
    • Peer Reviewed / Acknowledgement Compliant / Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-26800109, KAKENHI-PLANNED-25120007, KAKENHI-PROJECT-13J03094, KAKENHI-PROJECT-24340042
  • [Journal Article] Magnetization Degree at the Jet Base of M87 Derived from the Event Horizon Telescope Data: Testing the Magnetically Driven Jet Paradigm2015

    • Author(s)
      Kino, M.; Takahara, F.; Hada, K.; Akiyama, K.; Nagai, H.; Sohn, B. W.
    • Journal Title

      The Astrophysical Journal

      Volume: 803

    • DOI
      10.1088/0004-637x/803/1/30
    • Peer Reviewed / Acknowledgement Compliant
    • Data Source
      KAKENHI-PROJECT-12J07566, KAKENHI-PROJECT-24340042, KAKENHI-PLANNED-25120007
  • [Journal Article] Discovery of Sub- to Superluminal Motions in the M87 Jet: An Implication of Acceleration from Sub-relativistic to Relativistic Speeds2014

    • Author(s)
      Asada, Keiichi; Nakamura, Masanori; Doi, Akihiro; Nagai, Hiroshi; Inoue, Makoto
    • Journal Title

      The Astrophysical Journal Letters

      Volume: Volume 781, Issue 1

    • DOI
      10.1088/2041-8205/781/1/l2
    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-24340042
  • [Journal Article] Limb-brightened Jet of 3C 84 Revealed by the 43 GHz Very-Long-Baseline-Array Observation2014

    • Author(s)
      Nagai, H.; Haga, T.; Giovannini, G.; Doi, A.; Orienti, M.; D'Ammando, F.; Kino, M.; Nakamura, M.; Asada, K.; Hada, K.; Giroletti, M.
    • Journal Title

      The Astrophysical Journal

      Volume: 785 Pages: 53-58

    • DOI
      10.1088/0004-637x/785/1/53
    • Peer Reviewed / Open Access / Acknowledgement Compliant
    • Data Source
      KAKENHI-PROJECT-13J03094, KAKENHI-PROJECT-24340042, KAKENHI-PROJECT-24540240, KAKENHI-PROJECT-26800109
  • [Journal Article] A Strong Radio Brightening at the Jet Base of M 87 during the Elevated Very High Energy Gamma-Ray State in 20122014

    • Author(s)
      Hada, K.; Giroletti, M.; Kino, M.; Giovannini, G.; D'Ammando, F.; Cheung, C. C.; Beilicke, M.; Nagai, H.; Doi, A.; Akiyama, K.; Honma, M.; Niinuma, K.; Casadio, C.; Orienti, M.; Krawczynski, H.; Gomez, J. L.; Sawada-Satoh, S.; Koyama, S.; Cesarini, A.; Nakahara, S.; Gurwell, M. A.
    • Journal Title

      The Astrophysical Journal

      Volume: 788 Pages: 165-177

    • DOI
      10.1088/0004-637x/788/2/165
    • Peer Reviewed / Open Access / Acknowledgement Compliant
    • Data Source
      KAKENHI-PROJECT-12J07566, KAKENHI-PROJECT-13J03094, KAKENHI-PROJECT-24340042, KAKENHI-PROJECT-24540242, KAKENHI-PLANNED-25120007, KAKENHI-PROJECT-26800109
  • [Journal Article] Very Long Baseline Array Multi-frequency Polarimetric Imaging of Radio-loud Broad Absorption Line Quasars2013

    • Author(s)
      Hayashi, Takayuki J.; Doi, Akihiro; Nagai, Hiroshi
    • Journal Title

      The Astrophysical Journal

      Volume: Volume 772, Issue 1

    • DOI
      10.1088/0004-637x/772/1/4
    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-24340042
  • [Journal Article] ALMA Continuum Spectrum of the M87 Nucleus. Quasi-simultaneous continuum observations at bands-3, 6, 7, and 92013

    • Author(s)
      Doi, A., Hada, K., Nagai, H., Kino, M., Honma, M., Akiyama, K., Oyama and T., Kono, Y.
    • Journal Title

      The European Physical Journal Web of Conferences

      Volume: 61 Pages: 080081-080083

    • DOI
      10.1051/epjconf/20136108008
    • Data Source
      KAKENHI-PROJECT-12J07566, KAKENHI-PROJECT-13J03094, KAKENHI-PROJECT-24540240
  • [Journal Article] The Innermost Collimation Structure of the M87 Jet Down to ~10 Schwarzschild Radii2013

    • Author(s)
      Hada, K., Kino, M., Doi, A., Nagai, H., Honma, M., Hagiwara, Y., Giroletti, M., Giovannini, G., Kawaguchi, N.
    • Journal Title

      The Astrophysical Journal

      Volume: 775 Pages: 70-76

    • DOI
      10.1088/0004-637x/775/1/70
    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-13J03094, KAKENHI-PROJECT-24340042, KAKENHI-PROJECT-24540240, KAKENHI-PROJECT-24540242, KAKENHI-PLANNED-25120007
  • [Journal Article] VLBI Imagings of Kilo-parsec Knot in 3C 3802013

    • Author(s)
      Koyama, Kino, Nagai, Hada, et al.
    • Journal Title

      Publications of the Astronomical Society of Japan

      Volume: 65

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-24340042
  • [Journal Article] Probing the Radio Counterpart of Gamma-ray Flaring Region in 3C 842013

    • Author(s)
      Nagai, H., Orienti, M., Kino, M., Doi, A., Giovannini, G., Asada, K., D'Ammando, F., Haga, T., Giroletti, M., Hada, K.
    • Journal Title

      EPJ Web of Conferences

      Volume: 61 Pages: 040081-040085

    • DOI
      10.1051/epjconf/20136104008
    • Data Source
      KAKENHI-PROJECT-13J03094, KAKENHI-PROJECT-24540240
  • [Journal Article] The GENJI Programme: Gamma-Ray Emitting Notable AGN Monitoring by Japanese VLBI2013

    • Author(s)
      Nagai, Hiroshi; Kino, Motoki; Niinuma, Kotaro; Akiyama, Kazunori; Hada, Kazuhiro; Koyama, Shoko; Orienti, Monica; Hiura, Koichiro; Sawada-Satoh, Satoko; Honma, Mareki; Giovannini, Gabriele; Giroletti, Marcello; Shibata, Katsunori; Sorai, Kazuo
    • Journal Title

      Publications of the Astronomical Society of Japan

      Volume: Vol.65, No.2

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-24340042
  • [Journal Article] VERA monitoring of a blazar OJ 2872013

    • Author(s)
      Sawada-Satoh, S., Akiyama, K., Kino, M., Nagai, H. and Niinuma, K.
    • Journal Title

      EPJ Web of Conferences

      Volume: 61 Pages: 8007-8007

    • DOI
      10.1051/epjconf/20136108007
    • Data Source
      KAKENHI-PROJECT-12J07566, KAKENHI-PROJECT-24540240
  • [Journal Article] Multifrequency VLBI Observations of the Broad Absorption Line Quasar J1020+4320: Recently Restarted Jet Activity?2013

    • Author(s)
      Doi, Nagai, et al.
    • Journal Title

      Publications of the Astronomical Society of Japan

      Volume: 65

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-24340042
  • [Journal Article] Radio and y-ray follow-up of the exceptionally high-activity state of PKS 1510-089 1n 20112013

    • Author(s)
      Orienti, M., Koyama, S., D'Ammando, F., Giroletti, M., Kino, M., Nagai, H., Venturi, T., Dallacasa, D., Giovannini, G., Angelakis, E., Fuhrmann, L., Hovatta, T., Max-Moerbeck, W., Schinzel, F. K., Akiyama, K., Hada, K., Honma, M., Niinuma, K., Gasparrini. D., et al.
    • Journal Title

      Monthly Notices of the Royal Astronomical Society

      Volume: 428 Pages: 2418-2429

    • DOI
      10.1093/mnras/sts201
    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-12J07566, KAKENHI-PROJECT-24340042, KAKENHI-PROJECT-24540240
  • [Journal Article] Evidence for a Nuclear Radio Jet and its Structure down to ~100 Schwarzschild Radii in the Center of the Sombrero Galaxy (M 104, NGC 4594)2013

    • Author(s)
      Hada, K., Doi, A., Nagai, H., Inoue, M., Honma, M., Giroletti, M., Giovannini, G.
    • Journal Title

      The Astrophysical Journal

      Volume: 779 Pages: 6-18

    • DOI
      10.1088/0004-637x/779/1/6
    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-13J03094, KAKENHI-PROJECT-24340042, KAKENHI-PROJECT-24540242, KAKENHI-PLANNED-25120007
  • [Journal Article] Very Long Baseline Array Imaging of Parsec-scale Radio Emissions in Nearby Radio-quiet Narrow-line Seyfert 1 Galaxies2013

    • Author(s)
      Doi, Nagai, Hagiwara, et al
    • Journal Title

      Astrophysical Journal

      Volume: 765

    • DOI
      10.1088/0004-637x/765/1/69
    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-24340042
  • [Journal Article] Multifrequency VLBI Observations of the Broad Absorption Line Quasar J1020+4320: Recently Restarted Jet Activity?2013

    • Author(s)
      Doi, Akihiro; Murata, Yasuhiro; Mochizuki, Nanako; Takeuchi, Hiroshi; Asada, Keiichi; Hayashi, Takayuki J.; Nagai, Hiroshi; Shibata, Katsunori M.; Oyama, Tomoaki; Jike, Takaaki; Fujisawa, Kenta; Sugiyama, Koichiro; Ogawa, Hideo; Kimura, Kimihiro; Honma, Mareki; Kobayashi, Hideyuki; Koyama, Shoko
    • Journal Title

      Publications of the Astronomical Society of Japan

      Volume: Vol.65, No.3

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-24340042
  • [Journal Article] Multifrequency VLBI Observations of the Broad Absorption Line Quasar J1020+4320: Recently Restarted Jet Activity?2013

    • Author(s)
      Doi A., Murata Y., Mochizuki N., Takeuchi H., Asada K., Hayashi TJ., Nagai H., Shibata KM., Oyama T., Jike T., et al.
    • Journal Title

      Publications of the Astronomical Society of Japan

      Volume: 65

    • DOI
      10.1093/pasj/65.3.57
    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-24540242
  • [Journal Article] The GENJI Programme: Gamma-Ray Emitting Notable AGN Monitoring by Japanese VLBI Program2013

    • Author(s)
      Nagai, Kino, Hada, et al
    • Journal Title

      Publications of the Astronomical Society of Japan

      Volume: 65

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-24340042
  • [Journal Article] VLBI Imagings of a Kilo-Parsec Knot in 3C 3802013

    • Author(s)
      Koyama, S., Kino, M., Nagai, H., Hada, K., Kameno, S., Kobayashi , H.
    • Journal Title

      Publications of the Astronomical Society of Japan

      Volume: 65 Pages: 29-29

    • DOI
      10.1093/pasj/65.2.29
    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-13J03094, KAKENHI-PROJECT-23540268, KAKENHI-PROJECT-24340042, KAKENHI-PROJECT-24540240
  • [Journal Article] The GENJI Programme: Gamma-Ray Emitting Notable AGN Monitoring by Japanese VLBI2013

    • Author(s)
      Nagai, Hiroshi; Kino, Motoki; Niinuma, Kotaro; Akiyama, Kazunori; Hada, Kazuhiro; Koyama, Shoko; Orienti, Monica; Hiura, Koichiro; Sawada-Satoh, Satoko; Honma, Mareki et al.
    • Journal Title

      Publications of the Astronomical Society of Japan

      Volume: 65

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-24540240
  • [Journal Article] Kiloparsec-scale Radio Structures 1n Narrow-line Seyfert 1 Galaxies2012

    • Author(s)
      Doi, Kino, Nagai, et al.
    • Journal Title

      Astrophysical Journal

      Volume: 760

    • DOI
      10.1088/0004-637x/760/1/41
    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-24340042
  • [Journal Article] Possible Detection of Apparent Superluminal inward motion in Markarian 421 after the Giant X-ray are in February, 20102012

    • Author(s)
      K. Niinuma, M. Kino, H. Nagai, N. Isobe, K. E. Gabanyi, K. Hada, S. Koyama, K. Asada, T. Oyama, and K. Fujisawa
    • Journal Title

      The Astrophysical Journal

      Volume: 759 Pages: 84-84

    • DOI
      10.1088/0004-637x/759/2/84
    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-22740120, KAKENHI-PROJECT-22740130, KAKENHI-PROJECT-24340042, KAKENHI-PROJECT-24540240
  • [Journal Article] VLBI and single-dish monitoring of 3C 84 for the period 2009-20112012

    • Author(s)
      Nagai, Kino, Doi, et al.
    • Journal Title

      Monthly Notices of the Royal Astronomical Society

      Volume: 423

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-24340042
  • [Journal Article] VLBI Observations of the Jet in M87 During the Very-High-Energy Gamma-ray Flare in April 20102012

    • Author(s)
      Hada, Kino, Nagai, Doi, Hagiwara, et al.
    • Journal Title

      The Astrophysical Journal

      Volume: 760 Pages: 52-57

    • DOI
      10.1088/0004-637x/760/1/52
    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-24340042, KAKENHI-PROJECT-24540240, KAKENHI-PROJECT-24540242
  • [Journal Article] Millimeter Radio Continuum Emissions as the Activity of Supermassive Black Holes in Nearby Early-type Galaxies and Low-luminosity Active Galactic Nuclei2011

    • Author(s)
      Doi, A., et al.
    • Journal Title

      AJ

      Volume: 142 Pages: 167-167

    • DOI
      10.1088/0004-6256/142/5/167
    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-20001003, KAKENHI-PROJECT-21540250, KAKENHI-PROJECT-23540268
  • [Journal Article] Very Long Baseline Array Imaging of Parsec-scale Jet Structures in Radio-loud Narrow-line Seyfert 1 Galaxies2011

    • Author(s)
      Doi, Asada, Nagai
    • Journal Title

      The Astrophysical Journal

      Volume: Vol.738 Pages: 126-126

    • DOI
      10.1088/0004-637x/738/2/126
    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-21540250
  • [Journal Article] Global e-VLBI observations of the gamma-ray narrow line Seyfert 1 PMN J0948+00222011

    • Author(s)
      Giroletti, Doi, Nagai, et al
    • Journal Title

      Astronomy & Astrophysics

      Volume: Vol.528 Pages: 11-14

    • DOI
      10.1051/0004-6361/201116639
    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-21540250
  • [Journal Article] VLBI Monitoring of3C 84(NGC1275) in Early Phase of the2005Outburst2010

    • Author(s)
      Nagai, Doi, Fujisawa, et al.
    • Journal Title

      PASJ

      Volume: Vol.62, No.2 Pages: 11-15

    • URL
      http://ads.nao.ac.jp/abs/2010PASJ.62L.11N
    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-21540250
  • [Journal Article] VLBI Monitoring of 3C 84 (NGC 1275) in Early Phase of the 2005 Outburst2010

    • Author(s)
      Nagai, Hiroshi ; Suzuki, Kenta ; Asada, Keiichi ; Kino, Motoki ; Kameno, Seiji ; Doi, Akihiro, et al.
    • Journal Title

      Publications of the Astronomical Society of Japan

      Volume: 62, No2 Pages: 11-15

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-21540250
  • [Journal Article] Multiwavelength Monitoring of the Enigmatic Narrow? Line Seyfert1PMN J0948+0022in2009March-July2009

    • Author(s)
      Abdo, Doi, Nagai, et al.
    • Journal Title

      ApJ

      Volume: Vol.707, Issue1 Pages: 727-737

    • DOI
      10.1088/0004-637x/707/1/727
    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-21540250
  • [Presentation] ALMA Polarimetric Observations of Centaurus A2017

    • Author(s)
      Hiroshi Nagai
    • Organizer
      Submm/mm/cm QUESO Workshop 2017: Centimetre-Sub-Millimetre Q&U (and V) European Southern Observatory Workshop
    • Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-15K17619
  • [Presentation] Accretion Flow Property of 3C 84: A View Through Faraday Rotation2017

    • Author(s)
      Nagai, H.
    • Organizer
      Polarised Emission from Astrophysical Jets
    • Place of Presentation
      Ierapetra, Greece
    • Year and Date
      2017-06-12
    • Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-15K17619
  • [Presentation] ファラデー回転で探るNGC1275の核周環境2017

    • Author(s)
      永井 洋
    • Organizer
      2017年日本天文学会秋季年会
    • Data Source
      KAKENHI-PROJECT-15K17619
  • [Presentation] Accretion Flow Properties of NGC 12752017

    • Author(s)
      Hiroshi Nagai
    • Organizer
      Polarised Emission from Astrophysical Jets
    • Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-15K17619
  • [Presentation] 電波銀河3C84 のシェルにおけるガンマ線、宇宙線生成について2016

    • Author(s)
      紀基樹, 伊藤裕貴, 輪島清昭, 川勝望, M. Orienti, 永井洋, 伊藤亮介(
    • Organizer
      日本天文学会2016年秋季年会
    • Place of Presentation
      愛媛大学城北キャンパス
    • Year and Date
      2016-09-14
    • Data Source
      KAKENHI-PROJECT-24340042
  • [Presentation] 位置天文で探るブレーザーMrk 501 のジェット軸から外れた構造の起源2016

    • Author(s)
      小山翔子, 紀基樹, 土居明広, 新沼浩太郎, 永井洋, 秦和弘, E. Ros, M. Giroletti, G. Giovannini, M. Orienti
    • Organizer
      日本天文学会2016年秋季年会
    • Place of Presentation
      愛媛大学城北キャンパス
    • Year and Date
      2016-09-14
    • Data Source
      KAKENHI-PROJECT-24340042
  • [Presentation] ALMAサブミリ波偏波観測で探るCentaurus Aの質量降着流2016

    • Author(s)
      永井洋、浅田圭一、中村雅徳、中西康一
    • Organizer
      日本天文学会2016年秋季年会
    • Place of Presentation
      愛媛大学城北キャンパス
    • Year and Date
      2016-09-14
    • Data Source
      KAKENHI-PROJECT-24340042
  • [Presentation] アルマ偏波観測で探るCentaurus Aの質量降着流2016

    • Author(s)
      永井洋
    • Organizer
      2016年日本天文学会秋季年会
    • Place of Presentation
      愛媛大学(愛媛県、松山)
    • Year and Date
      2016-09-14
    • Data Source
      KAKENHI-PROJECT-15K17619
  • [Presentation] Recent VLBI Results of 3C84 and Prospects for mm VLBI with phased ALMA2016

    • Author(s)
      Hiroshi Nagai
    • Organizer
      ALMA workshop "Ultra-High Resolution Observation with Phased-ALMA”
    • Place of Presentation
      Mitaka campus of National Astronomical Observatory of Japan
    • Year and Date
      2016-01-13
    • Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-24340042
  • [Presentation] EVN 及び VLBA を用いた M87 ジェットにおける活動的ノット HST-1 の 長期運動モニター2015

    • Author(s)
      秦和弘, M. Giroletti, G. Giovannini, C. Casadio, J. L. Gomez, C. C. Cheung, 紀基樹, 永井洋, 土居明広
    • Organizer
      日本天文学会2015年秋季年会
    • Place of Presentation
      甲南大学
    • Year and Date
      2015-09-09
    • Data Source
      KAKENHI-PROJECT-24340042
  • [Presentation] Long-term Radio and Gamma-ray Properties of 3C 842015

    • Author(s)
      永井 洋
    • Organizer
      5th Workshop on Compact Steep Spectrum and GHz-Peaked Spectrum Radio Sources
    • Place of Presentation
      Riccione, Italy
    • Year and Date
      2015-05-27
    • Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-15K17619
  • [Presentation] GENJIプログラム:VLBIモニター観測による電波銀河3C 84の長期変動2014

    • Author(s)
      千田 華,永井 洋,本間希樹,西嶋恭司,ほか GENJIプログラムメンバー
    • Organizer
      日本天文学会
    • Place of Presentation
      国際基督教大学
    • Data Source
      KAKENHI-PROJECT-24340042
  • [Presentation] M87における2012年TeV $\gamma$線活動に同期したブラックホール近傍数10シュバルツシルト半径以内からの強い電波増光の検出2014

    • Author(s)
      秦和弘, 永井洋, 秋山和徳, 本間希樹, 紀基樹, 土居明広, 新沼浩太郎, G.Giroletti, G.Giovannini, T.Cheung,M.Beilicke他
    • Organizer
      日本天文学会
    • Place of Presentation
      国際基督教大学
    • Data Source
      KAKENHI-PROJECT-24340042
  • [Presentation] VLBA-43GHzで捉えたブレーザーMrk 501のジェット深部の微細構造2013

    • Author(s)
      小山翔子,紀基樹,土居明広,永井洋,新沼浩太郎,秦和弘,M. Giroletti,G. Giovannini, M. Orienti
    • Organizer
      日本天文学会
    • Place of Presentation
      東北大学
    • Data Source
      KAKENHI-PROJECT-24340042
  • [Presentation] 多波長観測で探る中心エンジン・核周物質とジェットのトリガ2013

    • Author(s)
      永井洋、土居明広
    • Organizer
      日本天文学会春季年会
    • Place of Presentation
      埼玉大学
    • Year and Date
      2013-03-22
    • Data Source
      KAKENHI-PROJECT-24340042
  • [Presentation] 電波銀河3C 84ジェットにおける二重稜線構造の発見2013

    • Author(s)
      永井洋,羽賀隆史,Monica Orienti,紀基樹,土居明広,秦和弘,浅田圭一,Gabriele Giovannini,Marcello Giroletti
    • Organizer
      日本天文学会
    • Place of Presentation
      東北大学
    • Data Source
      KAKENHI-PROJECT-24340042
  • [Presentation] 多周波位相補償VLBI観測によるソンブレロ銀河(M104, NGC4594)中心核100シュバルツシルト半径スケールの構造探査2013

    • Author(s)
      秦和弘, 土居明広, 永井洋, 井上允
    • Organizer
      日本天文学会
    • Place of Presentation
      東北大学
    • Data Source
      KAKENHI-PROJECT-24340042
  • [Presentation] TeVブレーザーMrk 421の静穏期における電波コアのふらつき探査2013

    • Author(s)
      新沼浩太郎, 紀 基樹, 土居明広, 小山翔子,秦 和弘, 永井 洋, Lico R.
    • Organizer
      日本天文学会
    • Place of Presentation
      東北大学
    • Data Source
      KAKENHI-PROJECT-24340042
  • [Presentation] 活動銀河核ジェットの高エネルギー放射領域の探査とALMA偏光観測への展望2012

    • Author(s)
      永井洋
    • Organizer
      日本天文学会秋季年会
    • Place of Presentation
      大分大学
    • Year and Date
      2012-09-19
    • Data Source
      KAKENHI-PROJECT-24340042
  • [Presentation] 降着円盤風を持つクェーサーに付随する非熱的ジェットの再帰的活動性2012

    • Author(s)
      林隆之,土居明広,永井洋, et al
    • Organizer
      日本天文学会,春季年会
    • Place of Presentation
      龍谷大学
    • Year and Date
      2012-03-20
    • Data Source
      KAKENHI-PROJECT-21540250
  • [Presentation] 狭輝線セイファート1型銀河の電波銀河の発見2012

    • Author(s)
      土居明広,永井洋, et al
    • Organizer
      日本天文学会,春季年会
    • Place of Presentation
      龍谷大学
    • Year and Date
      2012-03-19
    • Data Source
      KAKENHI-PROJECT-21540250
  • [Presentation] 狭輝線セイファート1型銀河のカンマ線放射、キロパーセクスケール電波放射、ブラックホール質量の関連2012

    • Author(s)
      土居明広、紀基樹、永井洋
    • Organizer
      日本天文学会秋季年会
    • Place of Presentation
      大分大学
    • Year and Date
      2012-09-19
    • Data Source
      KAKENHI-PROJECT-24340042
  • [Presentation] ガンマ線フレーザーMrk 501の電波コア絶対位置ふらつき探索2012

    • Author(s)
      小山翔子、紀基樹、土居明広、永井洋、新沼浩太郎、秦和弘
    • Organizer
      日本天文学会秋季年会
    • Place of Presentation
      大分大学
    • Year and Date
      2012-09-19
    • Data Source
      KAKENHI-PROJECT-24340042
  • [Presentation] GEN JIプログラム:3C 454. 3の2010年11月のy線フレア後の電波帯での多周波ライトカーブ2012

    • Author(s)
      秋山和徳、永井洋、紀基樹、新沼浩太郎、秦和弘、小山翔子
    • Organizer
      日本天文学会秋季年会
    • Place of Presentation
      大分大学
    • Year and Date
      2012-09-19
    • Data Source
      KAKENHI-PROJECT-24340042
  • [Presentation] 狭輝線セイファート1型銀河の電波銀河の発見2012

    • Author(s)
      土居明広、柳楽央至、川勝望、紀基樹、永井洋、浅田圭一
    • Organizer
      日本天文学会2012年春季年会
    • Place of Presentation
      龍谷大学
    • Year and Date
      2012-03-19
    • Data Source
      KAKENHI-PROJECT-21540250
  • [Presentation] GEN JIプログラム(II) : VERAを用いた高頻度活動銀河核ジェットモニター観測2012

    • Author(s)
      永井洋、紀基樹、新沼浩太郎、秦和弘、小山翔子
    • Organizer
      日本天文学会秋季年会
    • Place of Presentation
      大分大学
    • Year and Date
      2012-09-19
    • Data Source
      KAKENHI-PROJECT-24340042
  • [Presentation] 多周波VLBIによる電波銀河M87の中心エンジン近傍10-100シュバルツシルト半径領域におけるジェット形状探査2012

    • Author(s)
      秦和弘,紀基樹,永井洋,土居明広,萩原喜昭
    • Organizer
      日本天文学会秋季年会
    • Place of Presentation
      大分大学
    • Year and Date
      2012-09-19
    • Data Source
      KAKENHI-PROJECT-24340042
  • [Presentation] 降着円盤風を持つクェーサーに付随する非熱的ジェットの再帰的活動性2012

    • Author(s)
      林隆之、土居明広、永井洋
    • Organizer
      日本天文学会2012年春季年会
    • Place of Presentation
      龍谷大学
    • Year and Date
      2012-03-20
    • Data Source
      KAKENHI-PROJECT-21540250
  • [Presentation] 電波で明るいBALクェーサーのVLBAによる多周波偏波観測2011

    • Author(s)
      林隆之,土居明広,永井洋
    • Organizer
      日本天文学会,春季年会
    • Place of Presentation
      筑波大学
    • Year and Date
      2011-03-19
    • Data Source
      KAKENHI-PROJECT-21540250
  • [Presentation] Broad Absorption Line/Giga-hertz Peaked Spectrum クェーサー? : Japanese VLBI Network によるVLBI多周波観測2009

    • Author(s)
      土居明広、望月奈々子、村田泰宏、浅田圭一、永井洋、本間希樹、藤澤健太、JVNチーム
    • Organizer
      日本天文学会
    • Place of Presentation
      山口大学
    • Year and Date
      2009-09-14
    • Data Source
      KAKENHI-PROJECT-21540250
  • [Presentation] M87ジェット最深部のサブミリ波放射領域における磁場強度

    • Author(s)
      紀基樹, 高原文郎, 秦和弘, 秋山和徳, 永井洋, B.W. Sohn
    • Organizer
      日本天文学会
    • Place of Presentation
      山形大学
    • Year and Date
      2014-09-11 – 2014-09-13
    • Data Source
      KAKENHI-PROJECT-24340042
  • [Presentation] VLBA+GBT@86GHzによるM87ジェット生成領域の高分解能・高解像度

    • Author(s)
      秦和弘, 紀基樹, 永井洋, 本間希樹, 秋山和徳, 田崎文得, 萩原喜昭, 土居 明広, G.Giovannini, M.Giroletti
    • Organizer
      日本天文学会
    • Place of Presentation
      国際基督教大学
    • Year and Date
      2015-03-19 – 2015-03-22
    • Data Source
      KAKENHI-PROJECT-24340042
  • [Presentation] ALMAによるkpcジェットからのミリ波サブミリ波放射の検出

    • Author(s)
      永井洋, 紀基樹、小山翔子、Elisabetta Liuzzo
    • Organizer
      日本天文学会
    • Place of Presentation
      山形大学
    • Year and Date
      2014-09-11 – 2014-09-13
    • Data Source
      KAKENHI-PROJECT-24340042
  • 1.  DOI Akihiro (90403641)
    # of Collaborated Projects: 3 results
    # of Collaborated Products: 43 results
  • 2.  HAGIWARA Yoshiaki (60399300)
    # of Collaborated Projects: 2 results
    # of Collaborated Products: 7 results
  • 3.  紀 基樹 (70531234)
    # of Collaborated Projects: 2 results
    # of Collaborated Products: 41 results
  • 4.  FUJISAWA Kenta (70311181)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 5.  HONMA Mareki (20332166)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 9 results
  • 6.  OYAMA Tomoaki (70425403)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 1 results
  • 7.  KAWABE Ryohei (10195141)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 8.  澤田 聡子 (00452631)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 2 results
  • 9.  AKIYAMA Kazunori
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 7 results
  • 10.  TAZAKI Fumie
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 1 results
  • 11.  HADA Kazuhiro
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 17 results
  • 12.  MURAKAWA KOJI
    # of Collaborated Projects: 0 results
    # of Collaborated Products: 1 results
  • 13.  Momose Munetake
    # of Collaborated Projects: 0 results
    # of Collaborated Products: 2 results
  • 14.  Tsukagoshi Takashi
    # of Collaborated Projects: 0 results
    # of Collaborated Products: 1 results
  • 15.  Kataoka Akimasa
    # of Collaborated Projects: 0 results
    # of Collaborated Products: 2 results
  • 16.  GIOVANNINI Gabriele
    # of Collaborated Projects: 0 results
    # of Collaborated Products: 5 results
  • 17.  ISOBE Naoki
    # of Collaborated Projects: 0 results
    # of Collaborated Products: 1 results
  • 18.  NIINUMA Kotaro
    # of Collaborated Projects: 0 results
    # of Collaborated Products: 1 results
  • 19.  KAWAKATU Nozomu
    # of Collaborated Projects: 0 results
    # of Collaborated Products: 1 results
  • 20.  藤沢 健太
    # of Collaborated Projects: 0 results
    # of Collaborated Products: 2 results
  • 21.  深川 美里
    # of Collaborated Projects: 0 results
    # of Collaborated Products: 1 results
  • 22.  武藤 恭之
    # of Collaborated Projects: 0 results
    # of Collaborated Products: 1 results
  • 23.  花輪 知幸
    # of Collaborated Projects: 0 results
    # of Collaborated Products: 1 results
  • 24.  亀野 誠二
    # of Collaborated Projects: 0 results
    # of Collaborated Products: 2 results
  • 25.  藤田 裕
    # of Collaborated Projects: 0 results
    # of Collaborated Products: 2 results

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