Centers & Labs

Chief Scientist Laboratories

Computational Astrophysics Laboratory

Chief Scientist: Toshikazu Ebisuzaki (Ph.D.)
Toshikazu  Ebisuzaki(Ph.D.)

We promote the EUSO (Extreme Universe Space Observatory onboard Japanese Experiment Module) mission to explore the origin of extreme energy particles, above 1020eV. In addition, we conduct studies of the wakefield acceleration of ultra high energy cosmic rays around accreting supermassive blackholes. formation and merging of a black hole binary. Next, we also study the formation process of the life planets and the origin of life in the Hadean Earth, joining KAKENHI Grant-in-Aid for Scientific Research on Innovative Areas“Hadean Bioscience”. We have investigated the encounters with nebulae (dark nebulae and supernova remnants) caused the snowball Earth events and mass extinctions.

Main Research Field

Physics

Related Research Fields

Biology & Biochemistry / Neuroscience & Behavior / Multidisciplinary / Space Science / Geosciences

Research Subjects

  • Extreme Energy Cosmic-rays
  • Astrophysical Simulations
  • Origin and Evolution of Life
  • Wakefield Acceleration of Charged Particle

Selected Publications

  1. Toshikazu Ebisuzaki,, Mark N. Quinn, Satoshi Wada, Lech Wiktor Piotrowski, Yoshiyuki Takizawa, Marco Casolino, Mario E. Bertaina, Philippe Gorodetzky, Etienne Parizot, Toshiki Tajima, Rémi Soulard, Gérard Mourou.:
    “Demonstration designs for the remediation of space debris from the International Space Station”
    Acta Astronautica 112, 102-113 (2015)
  2. Ebisuzaki T, Maruyama S.:
    “United theory of biological evolution: Disaster-forced evolution through Supernova, radioactive ash fall-outs, genome instability, and mass extinctions”
    Geoscience Frontiers 6, 103-119 (2015)
  3. Fumiyoshi Kajino, Toshikazu Ebisuzaki, Marco Casolino, Yoshiyuki Takizawa, Yoshiya Kawasaki, Naoto Sakaki, Sergei Sharakin, Pavel Klimov, Mikhail I. Panashyuk for the JEM-EUSO Collaboration. :
    "K-EUSO: An improved optical system for KLYPVE ultra-high energy cosmic ray space telescope”
    Proc. 34th ICRC (Hague), 634 (2015)
  4. The JEM-EUSO Collaboration.:
    “The JEM-EUSO mission: An introduction”
    Special Issue on the JEM-EUSO Mission, Experimental Astronomy 40, 3-17 (2015), ISSN: 0922-6435
  5. Toshiaki Iitaka, Hiroshi Fukui, Zhi Li, Nozomu Hiraoka, Tetsuo Irifune.:
    "Pressure-induced dissociation of water molecules in ice VII",
    Sci. Rep. 5, 12551 (2015).
  6. Kataoka, R., T. Ebisuzaki, H. Miyahara, T. Nimura, T. Tomida, T. Sato, and S. Maruyama.:
    "The Nebula Winter: The united view of the snowball Earth, mass extinctions, and explosive evolution in the late Neoproterozoic and Cambrian periods"
    Gondwana Research 25, 1153-1163 (2014)
  7. Kataoka, R., T. Ebisuzaki, H. Miyahara, T. Nimura, T. Tomida, T. Sato, and S. Maruyama.:
    "The Nebula Winter: The united view of the snowball Earth, mass extinctions, and explosive evolution in the late Neoproterozoic and Cambrian periods"
    Gondwana Research 25, 1153-1163 (2014)
  8. Ryuho Kataoka, Toshikazu Ebisuzaki, Hiroko Miyahara, Shigenori Maruyama.:
    "Snowball Earth events driven by starbursts of the Milky Way Galaxy"
    New Astronomy 21, 50-62 (2013)
  9. A. Mizuta & K. Ioka.:
    "Opening Angles of Collapsar Jets"
    Astrophysical Journal, 777, 162 (2013)
  10. Shirao T, Ueno K, Abe T and Matsuyama T.:
    "Development of DNA markers for identifying chrysanthemum cultivars generated by ion-beam irradiation"
    Molecular Breeding 31:729-735, (2013)

Lab Members

Principal Investigator

Toshikazu Ebisuzaki
Chief Scientist

Core Members

Toshiaki Iitaka
Senior Research Scientist
Tomoki Matsuyama
Senior Research Scientist
Yoshiyuki Takizawa
Senior Research Scientist
Akira Mizuta
Research Scientist
Yusuke Tsukamoto
Special Postdoctoral Researcher
Yusuke Imaeda
Contract Researcher
Teppei Suzuki
Contract Researcher
Tsutomu Kawatsu
Contract Researcher
Kazuki Murata
Junior Research Associate
Iriko Kaneko
Technical Staff I

Contact information

2-1 Hirosawa, Wako, Saitama 351-0198, Japan

Email: cap-labinfo [at] riken.jp

Related links

Recent research results

Annual research report