Centers & Labs

Chief Scientist Laboratories

Astrophysical Big Bang Laboratory

Chief Scientist: Shigehiro Nagataki (Ph.D.)
Shigehiro  Nagataki(Ph.D.)

Our laboratory, Astrophysical Big Bang Laboratory, was established on 1st Apr. 2013. Our group focuses on unveiling lots of mysteries surrounding astrophysical explosive phenomena such as supernovae (SNe) and gamma-ray bursts (GRBs). SNe and GRBs are the most powerful explosions in the universe, and yet very little are known about their explosion mechanisms. These astrophysical big bangs continue to fascinate us with their unknown physics and puzzling astronomical phenomena such as gravitational waves, r-process nucleosynthesis, particle acceleration, high-energy gamma-rays/neutrinos, ultra high-energy cosmic rays. Through our theoretical and computational approaches, we strive to reveal the complete pictures of these violent explosions and provide the-state-of-the-art physical interpretations for current, cutting-edge observations as well as useful predictions for future observations by the next-generation astronomical observatories. We are more than passionate to co-operate with researchers in RIKEN as well as all other interested groups in Japan and the world, and together we would like to establish a Utopia in RIKEN for scientists.

Main Research Field

Mathematical and physical sciences

Related Research Fields


Theoretical Astrophysics / Astroparticle Physics / Nuclear Astronomy


  • Supernovae
  • Gamma-Ray Bursts
  • Black Holes
  • Neutron Stars
  • Cosmic Rays

Selected Publications

  1. Utrobin, V., Wongwathanarat, A., Janka, T., Muller, E.:
    "Supernova 1987A: Neutrino-driven Explosions in Three Dimensions and Light Curves"
    Astronomy and Astrophysics Volume 581 id.A40 (2015).
  2. Ito, H., Matsumoto, J., Nagataki, S., Warren, D., Barkov, M.:
    "Photospheric Emission from Collapsar Jets in 3D Relativistic Hydrodynamics"
    The Astrophysical Journal Letters Volume 814, 29 (2015).
  3. Warren, D., Ellison, D., Bykov, A., Lee, S.-H.:
    "Electron and Ion Acceleration in Relativistic Shocks with Applications to GRB Afterglows"
    Monthly Notices of the Royal Astronomical Society Volume 452, 431 (2015).
  4. Mao, J., Ono, M., Nagataki, S., Hashimoto, M., Ito, H., Matsumoto, J., Dainotti, M., Lee, S.-H.:
    "Matter Mixing in Core-Collapse Supernova Ejecta: Large Density Perturbations in the Progenitor Stars?"
    The Astrophysical Journal Volume 808, id.164 (2015).
  5. Lee, S.-H., Patnaude, D.J., Raymond, J.C., Nagataki, S., Slane, P.O., Ellison, D.C.:
    "Modeling Bright gamma-Ray and Radio Emission at Fast Cloud Shocks"
    The Astrophysical Journal Volume 806, id.71 (2015).
  6. Patnaude, D.J., Lee, S-H., Slane, P.O.,.Badenes, C., Heger, A., Ellison, D.C., Nagataki, S.:
    "Are Models for Core-Collapse Supernova Progenitors Consistent with the Properties of Supernova Remnants?"
    The Astrophysical Journal Volume 803, id.101 (2015).
  7. Bosch-Ramon, V., Barkov, M. V., Perucho, M.:
    "Orbital evolution of colliding star and pulsar winds in 2D and 3D; effects of: dimensionality, EoS, resolution, and grid size"
    Astronomy and Astrophysics Volume 577, id.A89 (2015).
  8. Sumiyoshi, K., Takiwaki, T., Matsufuru, H., Yamada, S.:
    "Multi-dimensional Features of Neutrino Transfer in Core-collapse Supernovae"
    The Astrophysical Journal Supplement, Volume 216, article id. 5, 37 pp. (2015).
  9. Lee, S-H., Patnaude, D.J., Ellison, D.C., Nagataki, S., Slane, P. O.:
    "Reverse and Forward Shock X-Ray Emission in an Evolutionary Model of Supernova Remnants Undergoing Efficient Diffusive Shock Acceleration"
    The Astrophysical Journal, Volume 791, id. 97, 18 pp. (2014).
  10. Ito, H., Nagataki, S., Matsumoto, J., Lee, S-H., Tolstov, A., Mao, J., Dainotti, M., Mizuta, A.:
    "Spectral and Polarization Properties of Photospheric Emission from Stratified Jets"
    The Astrophysical Journal, Volume 789, id. 159, 19 pp. (2014).

Lab Members

Principal Investigator

Shigehiro Nagataki
Chief Scientist

Core Members

Masaomi Ono
Research Scientist
Hirotaka Ito
Research Scientist
Susumu Inoue
Research Scientist
Gilles Ferrand
Research Scientist
Haoning He
Special Postdoctoral Researcher
Oliver Just
Special Postdoctoral Researcher
Masanori Arakawa
Junior Research Associate
Maxim Barkov
Visiting Scientist
Toshio Terasawa
Visiting Scientist