• Dongsu Ryu (류동수)

  • Professor
  • Astrophysics
  • Current Research Interests

    The universe contains cosmic plasma of baryonic matter, in addition to dark matter and dark energy. The so-called nonthermal components of the plasma, that is, shock waves, magnetic fields, cosmic rays, and turbulence, are expected to play significant roles in the formation and observation of the large-scale structure of the universe. Yet, their nature and origin are not fully understood. In the lab, the cosmic plasma as well as dark matter and dark energy are explored. Along with numerical simulations for the formation of the cosmic structure, theoretical arguments based on plasma physical models for collisionless shock wave formation, cosmic ray acceleration, astrophysical turbulence, and magnetic field generation are employed.

    Research interests include

    • Shock waves and turbulence in clusters of galaxies
    • Origin and evolution of magnetic fields and cosmic rays in the universe
    • Plasma astrophysical phenomena in the large-scale structure of the universe
  • Biographical Sketch
    • B.S. in Astronomy (1983), Seoul National University, Korea
    • M.A. in Astronomy (1985), University of Texas at Austin, USA
    • Ph.D. in Astronomy (1988), University of Texas at Austin, USA
    • Postdoctoral Research in Fermi National Accelerator Laboratory, USA (1988-1990)
    • Postdoctoral Research in Princeton University, USA (1990-1992)
    • Professor in Department of Astronomy and Space Science, Chungnam National University, Korea (1992-2014)
    • Professor in Department of Physics, UNIST, Korea (2014-)
    • Adjunct Researcher and Director of Center for Theoretical Astronomy, Korea Astronomy and Space Science Institute (KSAI), Korea (2016-2017)
    • Director of Center for High-Energy Astrophysics (CHEA), UNIST, Korea (2016-)
    • Dean of School of Natural Science, UNIST, Korea (2017-)
  • Selected Publications
    1. Study of the Vertical Magnetic Field in Face-on Galaxies using FaradayTomography,Ideguchi, S., Tashiro, Y., Akahori, T., Takahashi, K. &Ryu, D.*2017, The Astrophysical Journal, 843, 146 (12pp).
    2. Fast Radio Bursts as Probes of Magnetic Fields in Filaments of Galaxies, Akahori, T., Ryu, D.*&Gaensler, B. D.2016, The Astrophysical Journal, 824, 105 (7pp).
    3. Radio and X-Ray Shocks in Clusters of Galaxies, Hong, S. E., Kang, H. &Ryu, D.* 2015, The Astrophysical Journal, 812, 49 (14pp).
    4. Diffusive Shock Acceleration Simulations of Radio Relics, Kang, H., Ryu, D.*& Jones, T. W. 2012, The Astrophysical Journal, 756, 97 (11pp).
    5. Turbulence and Magnetic Fields in the Large Scale Structure of the Universe, Ryu, D.*, Kang, H., Cho, J. & Das, S. 2008, Science, 320, 909-912.
    6. Cosmological Shock Waves and Their Role in the Large Scale Structure of the Universe, Ryu, D.*, Kang, H., Hallman, E. & Jones, T. W. 2003, The Astrophysical Journal, 593, 599-610.
    7. A Cosmological Hydrodynamic Code Based on the Total Variation Diminishing Scheme, Ryu, D.*, Ostriker, J. P., Kang, H. & Cen R. 1993, The Astrophysical Journal, 414, 1-19.