Cosmological Shock Waves and Their Role in the Large-Scale Structure of the Universe
- D. Ryu, Hyesung Kang, E. Hallman, T. Jones
- Physics
- 9 May 2003
We study the properties of cosmological shock waves identified in high-resolution, N-body/hydrodynamic simulations of a ΛCDM universe and their role on thermalization of gas and acceleration of…
Turbulence and Magnetic Fields in the Large-Scale Structure of the Universe
- D. Ryu, Hyesung Kang, Jungyeon Cho, Santabrata Das
- PhysicsScience
- 16 May 2008
This model presents a physical mechanism that transfers the gravitational energy to the turbulence and magnetic field energies in the large-scale structure of the universe.
Cosmic-Ray Electrons in Groups and Clusters of Galaxies: Primary and Secondary Populations from a Numerical Cosmological Simulation
- F. Miniati, T. Jones, Hyesung Kang, D. Ryu
- Physics
- 18 August 2001
We investigate the generation and distribution of high-energy electrons in the cosmic structure environment and their observational consequences by carrying out the first cosmological simulation that…
DIFFUSIVE SHOCK ACCELERATION AT COSMOLOGICAL SHOCK WAVES
- Hyesung Kang, D. Ryu
- Physics
- 13 December 2012
We reexamine nonlinear diffusive shock acceleration (DSA) at cosmological shocks in the large-scale structure of the universe, incorporating wave–particle interactions that are expected to operate in…
The Protogalactic Origin for Cosmic Magnetic Fields
- R. Kulsrud, R. Cen, J. Ostriker, D. Ryu
- Physics
- 28 July 1996
It is demonstrated that strong magnetic fields are produced from a zero initial magnetic field during the pregalactic era, when the galaxy is first forming. Their development proceeds in three…
DIFFUSIVE SHOCK ACCELERATION SIMULATIONS OF RADIO RELICS
- Hyesung Kang, D. Ryu, T. Jones
- Physics
- 9 May 2012
Recent radio observations have identified a class of structures, so-called radio relics, in clusters of galaxies. The radio emission from these sources is interpreted as synchrotron radiation from…
Density Power Spectrum of Compressible Hydrodynamic Turbulent Flows
- Jongsoo Kim, D. Ryu
- Physics
- 26 July 2005
Turbulent flows are ubiquitous in astrophysical environments, and understanding density structures and their statistics in turbulent media is of great importance in astrophysics. In this Letter, we…
Cosmic-Ray Protons Accelerated at Cosmological Shocks and Their Impact on Groups and Clusters of Galaxies
- F. Miniati, D. Ryu, Hyesung Kang, T. Jones
- Physics
- 26 May 2001
We investigate the production of cosmic-ray (CR) protons at cosmological shocks by performing, for the first time, numerical simulations of large-scale structure formation that include directly the…
GROWTH OF MAGNETIC FIELDS INDUCED BY TURBULENT MOTIONS
- Jungyeon Cho, E. Vishniac, A. Beresnyak, A. Lazarian, D. Ryu
- Physics
- 3 December 2008
We present numerical simulations of driven magnetohydrodynamic (MHD) turbulence with weak/moderate imposed magnetic fields. The main goal is to clarify dynamics of magnetic field growth. We also…
A Divergence-free Upwind Code for Multidimensional Magnetohydrodynamic Flows
- D. Ryu, F. Miniati, T. Jones, A. Frank
- Physics
- 22 July 1998
A description is given for preserving 𝛁 ∙ = 0 in a magnetohydrodynamic (MHD) code that employs the upwind, total variation diminishing (TVD) scheme and Strang type operator splitting for…
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