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Parabolic Streamline of the Black Hole-driven Jet from ten to million gravitational radii in M87
Formation of Superluminal Knots in GRMHD simulations
Shifting the Jet Stagnation Surface with the Black Hole Spin in GRMHD Simulations
Self-consistent GRMHD Simulations with Steady Axisymmetric Force-free Jet
Velocity Field of M87 jet
VSOP image of M87 at 5 GHz
Deep inside Perseus A — A Space VLBI telescope makes a sharp image of the forming black hole jets in the core of a radio galaxy
Resolving the Geometry of Innermost Relativistic Jets in Blazars
Distribution of the bulk velocity relative to the speed of light
VLBA total intensity map of the M87 jet at 43 GHz (2-a)
A Self-consistent Model for Super/sub-luminal Motions and Particle Acceleration in the M87 Jet
Hubble Takes Movies of Space Slinky in M87
Toward the Innermost Region of the Relativistic Jet from Supermassive Black Hole in the Active Galactic Nuclues M87
The Structure of the M87 Jet: A Transition from Parabolic to Conical Streamlines
Nakamura, Masanori
GLT/VLBI Project Research Scientist
photo of Nakamura, Masanori
Office: ASMAB 1322
TEL: +886-2-2366-5449
FAX: +886-2-2367-7849
Email: nakamura_replace2@_asiaa.sinica.edu.tw

Education and Positions

  • Project Research Scientist (2016~present)
  • Visiting Scientist (2010~2016)
  • Assistant Research Scientist, Johns Hopkins University (2008~2010)
  • Postdoctoral Research Associate, Los Alamos National Laboratory (2005~2008)
  • NRC Research Fellow, NASA Jet Propulsion Laboratory (2002~2005)
  • Ph.D in physics, Tokyo University of Science (2001)

Honors & Awards

  • Bruno Rossi Prize (2020)
  • Albert Einstein Medal (2020)
  • Breakthrough Prize in the Fundamental Physics (2020)
  • CTCI Foundation Science and Technology Contribution Award (2019)
  • Smithsonian American Ingenuity Awards (2019)
  • NSF Diamond Achievement Award (2019)
  • Allan C. Davis Fellow, JHU/STScI (2008~2010)
  • NRC Resident Research Associateship Program (2002~2005)

Research Interests

I have broad interests in theories and observations related mostly to high energy astrophysics and plasma astrophysics. I am actively woking on astrophysical jets, accretion disks, and supermassive black holes (SMBHs) in active galactic nuclei (AGNs) with MHD theory and computation. Dynamics of galaxy cores and SMBHs, co-evolution of galaxies and SMBHs via AGN feedback process, and very high energy emission in AGN jets are especially interested.

I have been extensively working on the active radio galaxy M87, one of the most important targets to image a black hole shadow since 2010 in the Greenland Telescope (GLT) / Event Horizon telescope (EHT) project. On April 10th 2019, the EHT collaboration released the first image of a black hole in the center of M87. I have contributed the project in various ways such as proposal writing, numerical modeling of the M87 jet, and serving an internal reviewer of the GRMHD code comparison paper. Detailed comparison between the observed jet in VLBI scales and GRMHD simulations/analytical model suggests parabolic jets from the spinning black hole in M87 (Nakamura, Asada, Hada, et al. 2018, ApJ). This will be examined by future EHT observations including the GLT (2018-).

One of my research highlights is discovering the jet collimation break (JCB) in M87, collaborating with Dr. K. Asada (Asada & Nakamura 2012, ApJL). Together with the proper motion study (Asada, Nakamura, et al. 2014, ApJL), the jet acceleration and collimation zone (ACZ) is observationally confirmed for the first time in AGN jets where the black hole gravity plays a dynamical role inside the sphere of influence. Our study opens a new era of studying AGN jets toward the fundamental understanding how to make a relativist jet (e.g. Blandford, Meier, & Readhead 2019, ARAA; Perlman et al. 2019 [Astro2020 Decadal Survey of Astronomy & Astrophyics].

Recent Journal Papers

  1. Nakahara, S., Doi A., Murata, Y., Nakamura, M., Hada, K., et al., "The Two-sided Jet Structures of NGC 1052 at Scales from 300 to 4 × 10^7 Schwarzschild Radii" , ASTRONOMICAL JOURNAL: 159, 14, 2020-01 [SCI] (Fulltext)
  2. Park, J., Hada, K., Kino, M., Nakamura, M., Ro, H., et al., "Kinematics of the M87 Jet in the Collimation Zone: Gradual Acceleration and Velocity Stratification" , ASTROPHYSICAL JOURNAL: 887, 147, 2019-12 [SCI] (Fulltext)
  3. Bower, G. C., Dexter, J., Asada, K., Brinkerink, C. D., Falcke, H., Ho, P., Inoue, M., Markoff, S., Marrone, D. P., Matsushita, S., Moscibrodzka, M., Nakamura, M., Peck, A., & Rao, R., "ALMA Observations of the Terahertz Spectrum of Sagittarius A*" , ASTROPHYSICAL JOURNAL: 881, L2-L8, 2019-08 [SCI] (Fulltext)
  4. Nokhrina, E. E., Gurvits, L. I., Beskin, V. S., Nakamura, M., Asada, K., Hada, K., "M87 black hole mass and spin estimate through the position of the jet boundary shape break" , Monthly Notices of the Royal Astronomical Society: 489, 1197-1205, 2019-08 [SCI] (Fulltext)
  5. Porth, O. et al. (The Event Horizon Telescope Collaboration), "The Event Horizon General Relativistic Magnetohydrodynamic Code Comparison Project" , ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES: 243, 26-65, 2019-08 [SCI] (Fulltext)
  6. Doi, A., Nakahara, S., Nakamura, M., Kino, M., Kawakatu, N., Nagai, H., "Radio Jet Structures at ~ 100 Parsec and Larger Scales of the gamma-ray-emitting Narrow-line Seyfert 1 Galaxy PMN J0948+0022" , MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY: 487, 640, 2019-07 [SCI],[SSCI] (Fulltext)
  7. Nakahara, S., Doi, A., Murata, Y., Nakamura, M., Hada, K., Asada, K., "The Cygnus A jet: Parabolic Streamlines up to Kiloparsec Scales" , ASTROPHYSICAL JOURNAL: 878, 61, 2019-06 [SCI],[SSCI] (Fulltext)
  8. Event Horizon Telescope Collaboration, et al., "First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole" , Astrophysical Journal Letters: 875(1), L1, 2019-04 [SCI],[SSCI] (Fulltext)
  9. Event Horizon Telescope Collaboration, et al., "First M87 Event Horizon Telescope Results. II. Array and Instrumentation" , Astrophysical Journal Letters: 875(1), L2, 2019-04 [SCI],[SSCI] (Fulltext)
  10. Event Horizon Telescope Collaboration, et al., "First M87 Event Horizon Telescope Results. III. Data Processing and Calibration" , Astrophysical Journal Letters: 875(1), L3, 2019-04 [SCI],[SSCI] (Fulltext)
  11. Event Horizon Telescope Collaboration, et al., "First M87 Event Horizon Telescope Results. IV. Imaging the Central Supermassive Black Hole" , Astrophysical Journal Letters: 875(1), L4, 2019-04 [SCI],[SSCI] (Fulltext)
  12. Event Horizon Telescope Collaboration, et al., "First M87 Event Horizon Telescope Results. V. Physical Origin of the Asymmetric Ring" , Astrophysical Journal Letters: 875(1), L5, 2019-04 [SCI],[SSCI] (Fulltext)
  13. Event Horizon Telescope Collaboration, et al., "First M87 Event Horizon Telescope Results. VI. The Shadow and Mass of the Central Black Hole" , Astrophysical Journal Letters: 875(1), L6, 2019-04 [SCI],[SSCI] (Fulltext)
  14. Park, J., Hada, K., Kino, M., Nakamura, M., Ro, H., Trippe, S., "Faraday rotation in the jet of M87 inside the Bondi radius: indication of winds from hot accretion flows confining the relativistic jet" , ASTROPHYSICAL JOURNAL: 871, 257, 2019-02 [SCI] (Fulltext)
  15. Takahashi, K., Toma, K., Kino, M., Nakamura, M., Hada, K., "Fast-spinning Black Holes Inferred from Symmetrically Limb-brightened Radio Jets" , ASTROPHYSICAL JOURNAL: 868, 82-103, 2018-12 [SCI] (Fulltext)
  16. Nakamura, M., Asada, K., Hada, K., Pu, H.-Y., Noble, S., Tseng, C.-Y., Toma, K., Kino, M., Nagai, H., Takahashi, K., and 11 coauthors, "Parabolic Jets from the Spinning Black Hole in M87" , ASTROPHYSICAL JOURNAL: 868, 146-173, 2018-12 [SCI] (Fulltext)
  17. Hada, K., Doi, A., Wajima, K., D’ammando, F., Orienti, M., Giroletti, M., Giovannini, G., Nakamura, M., & Asada, K., "Collimation, Acceleration and Recollimation Shock in the Jet of Gamma-ray Emitting Radio-loud Narrow- line-Seyfert 1 Galaxy 1H0323+342" , ASTROPHYSICAL JOURNAL: 860, 141-152, 2018-06 [SCI] (Fulltext)
  18. 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., Petrov, L., Sohn, B. W., Sokolovsky, K. V., Voitsik, P., Zensus, J. A., & Tingay, S., "Strong Collimation of the Radio Jet in 3C 84 on a Scale of a Few Hundred Gravitational Radii" , Nature Astronomy: 2, 472-477, 2018-04-03 [SCI] (Fulltext)
  19. Nakahara, S., Doi, A., Murata, Y., Hada, K., Nakamura, M., Asada, K., "Finding of Transitions of Physical Condition in Jets from Observations over the Range of 103–109 Schwarzschild Radii: the Radio Galaxy NGC 4261" , ASTROPHYSICAL JOURNAL: 854, 148-159, 2018-02-20 [SCI]
  20. Nagai, H., Fujita, Y., Nakamura, M., Orienti, M., Kino, M., Asada, K., Giovannini, G., "Enhanced Polarized Emission from the One-Parsec-Scale Hotspot of 3C 84 as a Result of the Inter- action with Clumpy Ambient Medium" , ASTROPHYSICAL JOURNAL: 849, 52-58, 2017-11 [SCI] (Fulltext)
  21. Pu, H.-Y., Wu, K., Younsi, Z., Asada, K., Mizuno, Y., Nakamura, M., "Observable Emission Features of Black Hole GRMHD Jets on Event Horizon Scales" , ASTROPHYSICAL JOURNAL: 845, 160-176, 2017-08 [SCI] (Fulltext)
  22. Algaba, J.-C., Nakamura, M., Asada, K., Lee, S. S., "Resolving the Geometry of the Innermost Relativistic Jets in Active Galactic Nuclei" , ASTROPHYSICAL JOURNAL: 834, 65-75, 2017-01 [SCI] (Fulltext)
  23. Asada, K., Nakamura, M., Pu, H.-Y., "Indication of the Black Hole Powerd Jet in M87 by VSOP Observations" , ASTROPHYSICAL JOURNAL: 833, 56, 2016-12 [SCI] (Fulltext)
  24. Tseng, C.-Y., Asada, K., Nakamura, M., Pu, H.-Y., Algaba, J.-C., Lo, W.-P., "Structural Transition in the NGC 6251 Jet: Interplay between a Supermassive Black Hole and its Host Galaxy" , ASTROPHYSICAL JOURNAL: 833, 288, 2016-12 [SCI] (Fulltext)
  25. Hirashita H; Koch PM; Matsushita S; Takauwa S; Nakamura M; Asada K; ..., "First-generation science cases for ground-based terahertz telescopes" , PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN: 68, 1, 2016-02 [SCI] (Fulltext)
  26. Algaba J.-C.; Asada K; Nakamura M, "Resolving the rotation measure of the M87 jet on kilo-parsec scales" , ASTROPHYSICAL JOURNAL: 823, 56, 2016 [SCI] (Fulltext)
  27. Akiyama K; ... ; Algaba J-C; Asada K; ... ; Bower G; ... ; Ho PTP; Inoue M; ... ; Nakamura M; ... ; Pradel N; ... , " 230 GHz VLBI Observations of M87: Event-horizon-scale Structure during an Enhanced Very-high-energy γ-Ray State in 2012" , ASTROPHYSICAL JOURNAL: 807, 150, 2015-07 [SCI] (Fulltext)
  28. Hung-Yi Pu, Masanori Nakamura, Kouichi Hirotani, Yosuke Mizuno, Kinwah Wu, and Keiichi Asada, "Steady General Relativistic Magnetohydrodynamic Inflow/Outflow Solution Along Large-Scale Magnetic Fields That Thread A Rotating Black Hole " , ASTROPHYSICAL JOURNAL: 801, 56, 2015 [SCI] (Fulltext)
  29. Inoue, M., Algaba-Marcos, J.C., Asada, K., Chang, C.-C., Chen, M.,-T., Han, J., Hirashita, H., Ho, P.T.P., Hsieh, S.-N., Huang, T., Jiang, H., Koch, P.M., Kubo, D.Y., Kuo, C.-Y., Liu, B., Martin-Cocher, P., Matsushita, S., Meyer-Zhao, Z., Nakamura, M., Nishioka, H., Nystrom, G., Pradel, N., Pu, H.-Y., Raffin, P.A., Shen, H.-Y., Snow, W., Srinivasan, R., Wei, T.-S., Blundell, R., Burgos, R., Grimes, P., Keto, E., Paine, S., Patel, N., Sridharan, T.K., Doeleman, S.S., Fish, V., Brisken, W., Napier, P., "Greenland Telescope Project --- Direct Confirmation of Black Hole with Sub-millimeter VLBI" , RADIO SCIENCE: 49(7), 564-571, 2014-07 [SCI] (Fulltext)
  30. Nakamura M, Meier D. L., "A Magnetohydrodynamic Model of The M87 Jet. II. Self-consistent Quad-shock Jet Model for Optical Relativistic Motions and Particle Acceleration" , ASTROPHYSICAL JOURNAL: 785, 152, 2014 [SCI] (Fulltext)
  31. Asada K,Nakamura M, Doi A, Nagai H, Inoue M, "Discovery of Sub- to Superluminal Motions in the M87 Jet: An Implication of the Acceleration from Sub-relativistic to Relativistic Speeds" , Astrophysical Journal Letters: 781(1), L2, 2014 [SCI] (Fulltext)
  32. Nagai H, ... , Nakamura M, Asada K, et al., "Limb-brightened Jet of 3C 84 Revealed by the 43 GHz Very-Long-Baseline-Array Observation " , ASTROPHYSICAL JOURNAL: 785, 53, 2014 [SCI] (Fulltext)
  33. Kuo C.-Y., Asada K, Rao R, Nakamura M, Algaba J.-C., Liu H. B., Inoue M, Koch P. M., Ho P. T. P., Matsushita S, Pu H.-Y, Akiyama K, Nishioka H, Pradel N, "Measuring Mass Accretion Rate onto the Supermassive Black Hole in M87 Using Faraday Rotation Measure with the Submillimeter Array" , Astrophysical Journal Letters: 783(2), L33, 2014 [SCI] (Fulltext)
  34. Fujita Y; Okabe N; ...; Matsushita S; Hirashita H; Nakamura M; et al., "Discovery of an Outstanding Disk in the cD Galaxy of the Hydra A Cluster" , PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN: Vo. 65, No. 6, 15, 2013 [SCI] (Fulltext)
  35. Meyer ET, Sparks WB, Biretta JA, Anderson J, Sohn ST, van der Marel RP, Norman CA, Nakamura M, "Optical Proper Motion Measurements of the M87 Jet: New Results from the Hubble Space Telescope" , Astrophysical Journal Letters: 774(2), 21, 2013 [SCI] (Fulltext)
  36. Nakamura M, Asada K, "The Parabolic Jet Structure in M87 as a Magnetohydrodynamic Nozzle" , ASTROPHYSICAL JOURNAL: 775, 118-128, 2013 [SCI] (Fulltext)
  37. Asada K, Nakamura M, "The Structure of the M87 Jet: A Transition from Parabolic to Conical Streamlines" , Astrophysical Journal Letters: 745(2), 28, 2012 [SCI] (Fulltext)
TEL: 886-2-3365-2200 FAX: 886-2-2367-7849
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