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7 papers · 2 filters
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…
Large Cosmic Shock Waves as Sites for Particle Acceleration
Francesco Miniati, Dongsu Ryu, Hyesung Kang +1
The properties of cosmic shock waves are studied through numerical simulations in two cosmological scenarios (SCDM and LCDM). The scaling relations for the average radius and veloc…
Ion injection and acceleration at modified shocks
U. D. J. Gieseler, T. W. Jones, Hyesung Kang
The theory of diffusive particle acceleration explains the spectral properties of the cosmic rays below energies of approx. 10^6 GeV as produced at strong shocks in supernova remna…
Evaporation of Compact Young Clusters near the Galactic Center
Sungsoo S. Kim, Mark Morris, Hyung Mok Lee
We investigate the dynamical evolution of compact young clusters (CYCs) near the Galactic center (GC) using Fokker-Planck models. CYCs are very young (< 5 Myr), compact (< 1 pc), a…
Bulges of Two Barred Galaxies: NGC 3412 and NGC 3941
H. B. Ann, I. Hwang
We have conducted near-infrared (J- and H-band) surface photometry for two early type barred galaxies, NGC 3412 and NGC 3941. The bulges of NGC 3412 and NGC 3941 show isophotal twi…
BOAO Photometric Survey of Galactic Open Clusters. I. Berkeley 14, Collinder 74, Biurakan 9, and NGC 2355
H. B. Ann, M. G. Lee, M. Y. Chun +6
Open clusters are useful tools to investigate the structure and evolution of the Galactic disk. We have started a long-term project to obtain UBVI CCD Photometry of open clusters w…