New Techniques in Hydrodynamical Cosmology: A Simulation

Details New Techniques in Hydrodynamical Cosmology: A Simulation New Techniques in Hydrodynamical Cosmology: A Simulation

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aas...181.7902b&link_type=abstract

American Astronomical Society, 181st AAS Meeting, #79.02; Bulletin of the American Astronomical Society, Vol. 24, p.1247

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We combine a particle mesh (PM) code, designed to evolve the dark matter component of the universe, with the novel Piecewise Parabolic Method (PPM) to follow the physically more complicated baryons. The third-order accurate PPM scheme integrates the adiabatic equations of hydrodynamics on a mesh to provide enhanced accuracy over traditional hydrocodes. A number of modifications are required for the PM + PPM scheme to accurately evolve all quantities in an expanding cosmological system. Along with these changes, a variety of test problems are presented. The simulation itself is a 90 h(-1) Mpc cube computed with 300(3) cells and 3 million particles starting from initial conditions derived from the linear predictions of the cold dark matter (CDM) scenario. We examine the structures that form, both in terms of density and temperature.

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