11 papers · 1 filter
Structure Shocks as a Source of Cosmic Rays in Clusters
T. W. Jones, Francesco Miniati, Dongsu Ryu +2
Shocks are a ubiquitous consequence of cosmic structure formation, and they play an essential role in heating galaxy cluster media. Virtually all of the gas in clusters has been pr…
3-D MHD Numerical Simulations of Cloud-Wind Interactions
G. Gregori, Francesco Miniati, Dongsu Ryu +1
We present results from three-dimensional (3-D) numerical simulations investigating the magnetohydrodynamics of cloud-wind interactions. The initial cloud is spherical while the ma…
Acceleration of CR at Large Scale Shocks and Their Cosmological Role for Structure Formation in the Universe
Francesco Miniati, Dongsu Ryu, T. W. Jones +1
We investigate the dynamical importance of a newly recognized possible source of significant feedback generated during structure formation; namely cosmic ray (CR) pressure. We pres…
Three-Dimensional Simulations of the Parker Instability in a Uniformly-rotating Disk
Jongsoo Kim, Dongsu Ryu, T. W. Jones
We investigate the nonlinear effects of uniform rotation on the Parker instability in an exponentially-stratified disk through high-resolution simulations. During the linear stage,…
Cosmic Rays and Their Radiative Processes in Numerical Cosmology
Dongsu Ryu, Francesco Miniati, Tom W. Jones +1
A cosmological hydrodynamic code is described, which includes a routine to compute cosmic ray acceleration and transport in a simplified way. The routine was designed to follow exp…
The First Magnetic Fields
George Davies, Lawrence M. Widrow
We demonstrate that the Biermann battery mechanism for the creation of large scale magnetic fields can arise in a simple model protogalaxy. Analytic calculations and numerical simu…