Professor

People

Dongsu Ryu류동수

연구주제

Astrophysics

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

PhD. 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 (2016-2022)
Dean of School of Natural Science, UNIST, Korea (2017-2018)
Dean of College of Natural Science, UNIST, Korea (2020-2022)
President of the Korean Astronomical Society (2020-2021)
Member of The Korean Academy of Science and Technology (2021-)
Endowed Chair Professor, Department of Physics, UNIST, Korea (2023-)

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.
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.
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.
Properties of Merger Shocks in Merging Galaxy Clusters, Ha, J.-H., Ryu, D.*, Kang, H. 2018, The Astrophysical Journal, 857, 26, (11pp).
Model Spectrum of Ultra-High-Energy Cosmic Rays Accelerated in FR-I Radio Galaxy Jets, Seo, J., Ryu, D.*, Kang, H. 2024, The Astrophysical Journal, 962, 46 (11pp).
Morphology and Mach Number Distribution of Merger Shock Surfaces in Merging Galaxy Clusters, Lee, E., Ryu, D.*, Kang, H. 2025, The Astrophysical Journal, 978, 122 (16pp).