Galaxy tracers in N-body simulations

Details Galaxy tracers in N-body simulations Galaxy tracers in N-body simulations

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993egte.conf...56s&link_type=abstract

In NASA. Ames Research Center, The Evolution of Galaxies and Their Environment p 56-57 (SEE N93-26706 10-90)

Astronomy and Astrophysics

Astronomy

2

Astronomical Models, Baryons, Compact Galaxies, Computerized Simulation, Cooling, Dark Matter, Density Distribution, Galactic Clusters, Galactic Evolution, Many Body Problem, Mass Distribution, Radiative Heat Transfer, Distribution Functions, Halos, Hydrodynamics, Morphology, Thermal Energy

Scientific paper

Using the method of smoothed particle hydrodynamics, we have modeled the formation of a compact group of galaxies with sufficient resolution to trace galaxies. Radiative cooling allows the baryons to dissipate their thermal energy and collapse to overdensities characteristic of real galaxies. With their cross section greatly reduced, these galaxy tracers remain distinct during cluster formation while their dark matter halos merge. In addition, the number density, the mass distribution function, and even the morphology of these objects are similar to those of observed galaxies. A viable population of galaxy tracers can be unambiguously defined.

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