Statistics – Applications
Scientific paper
Jan 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993egte.conf...68n&link_type=abstract
In NASA. Ames Research Center, The Evolution of Galaxies and Their Environment p 68-69 (SEE N93-26706 10-90)
Statistics
Applications
Computerized Simulation, Cooling, Dark Matter, Galactic Evolution, Gravitational Effects, Hydrodynamics, Radiative Heat Transfer, Universe, Applications Programs (Computers), Fragmentation
Scientific paper
Two dimensional numerical simulations of Zeldovich pancake fragmentation in a dark matter dominated universe were carried out to study the hydrodynamical and gravitational effects on the formation of structures such as protogalaxies. Preliminary results were given in Yuan, Centrella and, Norman (1991). Here we report a more exhaustive study to determine the sensitivity of protogalaxies to input parameters. The numerical code we used for the simulations combines the hydrodynamical code ZEUS-2D (Stone and Norman, 1992) which was modified to include the expansion of the universe and radiative cooling of the gas with a particle-mesh code which follows the motion of dark matter particles. The resulting hybrid code is able to handle highly nonuniform grids which we utilized to obtain a high resolution (much greater than 1 kpc) in the dense region of the pancake.
Anninos Wenbo Yuan
Centrella Joan
Norman Michael L.
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