Ken-Ichi Nishikawa

NRC Senior Fellow
The Gamma-Ray Astronomony
Space Science Research Center
National Space Science and Technology

Current Projects:

• Relativistic jets
  • Parallel injection:
    • 2-D: ``A Two-dimensional Simulation of Relativistic Magnetized Jet''
    • 3-D ``Three-Dimensional Magnetohydrodynamic Simulations of Relativistic Jets Injected along a Magnetic Field''
  • Oblique injection:
    • ``Three-dimensional Magnetohydrodynamic Simulations of Relativistic Jets Injected into an Oblique Magnetic Field''
    • ``The Texas Symposium Proceeding: 3-D Relativistic MHD Simulations''

  • Formation of relativistic jets
    • Koide et al. ``General Relativistic Magnetohydrodynamic Simulations of Jets from Black Hole Accretion Disks: Two-Component Jets Driven by Nonsteady Accretion of Magnetized Disks''
    • Koide et al. ``Relativistic Jet Formation from Black Hole Magnetized Accretion Disks: Method, Tests, and Applications of a General RelativisticMagnetohydrodynamic Numerical Code''
    • Koide et al. ``General Relativistic Simulations of Jet Formation in a Rapidly Rotating Black Hole Magnetosphere''
    • Nishikawa et al. ``3-D general relativistic MHD simulations of generating jets'' in the Proc. of Oxford Workshop on Particles and Fields in Radio Galaxy, in press (revised)
    • Nishikawa et al. ``A General Relativistic Magnetohydrodynamics Simulation of Jet Formation'' (re-submitted to ApJ)
    • ``More about Black Hole''
  • HEAD/APS presentations (April 20 - 23, 2002)
    • ``3-D General Relativistic MHD Simulations of Generation Jets (pdf)''
• Global solar wind-magnetosphere interaction with 3-D EM particle codes
  • ``Particle entry into the magnetosphere with a southward interplanetary magnetic field studied by a three-dimensional electromagnetic particle code'' (JGR, 102, 17,631, 1997)
  • ``Particle entry through reconnection grooves in the magnetopause with a dawnward IMF'' (GRL, 25, 1609, 1998)
  • ``Reconnections at Near-Earth Magnetotail and Substorms Studied by a 3-D EM Particle Code'' (Geospace Mass and Energy Flow: Results From the International Solar-Terrestrial Physics Program, Geophys. Monogr. Ser., vol. 104, edited by J. L. Horwitz, W. K. Peterson, and D. L. Gallagher, p. 175, AGU, Washington D.C., 1998)
  • ``Visualization and Criticality of Three-dimensional Magnetic Field Topology in the Magnetotail''(Earth Planets Space, 53, 1011-1019, 2001)
  • ``Evolution of thin sheet current with a southward IMF by a 3-D EM particle code''(JGR, 105, 13,009, 2000)
  • ``Global Particle Simulation for a Space Weather Model: Present and Future''(IEEE Trans. on Plasma Science, 28, 1991-2006, 2000)
  • ``Global Particle Simulation Study of Substorm Onset and Particle Acceleration''(Space Science Review, 95, 361, 2001)
• Particle acceleration in shocks
  • ``3-D relativistic electromagnetic particle simulation (pdf)''
  • ``Particle acceleration and Magnetic field Generation in Electron-Positron Relativistic Shocks (pdf)''
  • ``The influence of an ambient magnetic field on relativistic collisionless plasma shocks, C. Hededal and K.I. Nishikawa (pdf)''
  • ``Acceleration mechanics in Relativistic Shocks by the Weibel Instability (pdf)''
• Gamma-Ray Bursts
  • ``Relativistic Particle-In-Cell Simulation Studies of Prompt and Early Afterglows from GRBs (pdf)''
• Talks
  • ``Global Particle Simulation as A Space Weather Model (pdf)'' (CAWSES Symposium, March 19 - 20, 2002)
• EGS presentations (April 20 - 25, 2002)
  • ``Global particle simulations as a future model for Space Weather Program (pdf)''
  • ``Particle injection through reconnection in the dayside magnetopause (pdf)''
  • ``Global particle simulation study of substorm onset and particle acceleration (pdf)''
• Lecture Notes:
  • ``Tristan and its applications (Abstract for ISSS-6)''(pdf file)
  • ``Tristan and its application for global solar wind-magnetosphere interaction (Lecture note for ISSS-6)''(pdf file)
  • ``Lecture Note on Particle Simulation from Powerpoint presentation (draft and uncompleted)''(pdf file)
    • (Original 3-D Relativistic Electromagnetic Particle Code)
    • (Code modified for a magnetic reconnection study with Harris model)
  • ``Tristan code with High Performance Fortran (HPF) (submitted to HiWE2002)''(pdf file)

Revised August 2, 2002