• Kyujin Kwak (곽규진)

  • Associate Professor
  • Computational Astrophysics
  • Current Research Interests

    Research Interests:
    Computational Fluid Dynamics. Astrophysical and Laboratory Plasma. Hydrodynamics with Radiation, Nuclear, Atomic, and Molecular Reactions

    Research Keywords:
    Computational Astrophysics, Supercomputing, Plasma, Astro-Chemistry

    Supercomputers have been used to simulate various astrophysical phenomena, explaining physical processes behind observations and predicting new observables. We use supercomputer simulations to study following astrophysical phenomena:

    1. astrophysical plasma in the interstellar/intergalactic medium with non-equilibrium ionization calculations
    2. turbulence in relativistic flows with and without magnetic field
    3. nuclear burning within the stars and on the surface of compact stars such as white dwarfs and neutron stars.
    4. We also use numerical simulations of radiative transfer for the astrophysical phenomena such as gamma-ray bursts and supernovae.
    5. Our interest also includes molecular reactions occurring in various astro-physical and chemical environments.

    Ongoing Research Topics:

    • Non-equilibrium ionization simulations of astrophysical plasma in interstellar and intergalactic medium
    • Numerical relativity: hydrodynamic and magneto-hydrodynamic simulations of turbulence in relativistic flows
    • Computational nuclear astrophysics for the rare isotope accelerator experiments
    • Relativistic radiative transfer for the astrophysical applications (e.g., Gamma-Ray Bursts and Active Galactic Nuclei)
    • Non-equilibrium molecular reaction simulations
  • Biographical Sketch

    Career and Education

    • 2012~Present: Assistant Professor, UNIST
    • 2012: Post-doc., Korea Astronomy & Space Science Institute (KASI)
    • 2007~2012: Post-doc., Univ. of Georgia, USA
    • 2007: Ph. D. Physics & Astronomy, State Univ. of New York at Stony Brook, USA
    • 1999: M. S. Theoretical Nuclear Physics, Seoul National University
    • 1997: B. S. Physics, Seoul National University

    Academic Membership

    • 2013~Present: Member, Korean Astronomical Society
    • 2012~Present: Member, Korean Physical Society
    • 2004~Present: Member, American Astronomical Society
  • Selected Publications
    1. Spectroscopic study of the radionuclide Na-21 for the astrophysical F-17(alpha, p)Ne-20 reaction rate, S. Cha et al., 2017, Physical Review C, v.96, no.2, pp.025810
    2. Effects of rare isotope reaction rates on the light curve of an X-ray burst, Park, Byeongchan; Kwak, Kyujin; Chae, Kyung Yuk; Kim, Aram, 2016, NEW PHYSICS: SAE MULLI, v.66, no.12, pp.1524 – 1529
    3. Hyperon puzzle of neutron stars with Skyrme force models, Lim, Yeunhwan; Hyun, Chang Ho; Kwak, Kyujin; Lee, Chang-Hwan, 2015, International Journal of Modern Physics E-Nuclear Physics, v.24, no.12, pp.1550100
    4. Si Iv Column Densities Predicted from Non-Equilibrium Ionization Simulations of Turbulent Mixing Layers and High-Velocity Clouds, Kwak, Kyujin; Shelton, Robin L.; Henley, David B., 2015, Astrophysical Journal, v.812, no.2, pp.111
    5. The Origin of the Hot Gas in The Galactic Halo: Testing Galactic Fountain Models’ X-Ray Emission, Henley, David B.; Shelton, Robin L.; Kwak, Kyujin; Hill, Alex S.; Mac Low, Mordecai-Mark, 2015, Astrophysical Journal, v.800, no.2, pp.1 – 10