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Galaxy tracers in N-body simulations
- Source :
- NASA. Ames Research Center, The Evolution of Galaxies and Their Environment.
- Publication Year :
- 1993
- Publisher :
- United States: NASA Center for Aerospace Information (CASI), 1993.
-
Abstract
- 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.
- Subjects :
- Astrophysics
Subjects
Details
- Language :
- English
- Database :
- NASA Technical Reports
- Journal :
- NASA. Ames Research Center, The Evolution of Galaxies and Their Environment
- Publication Type :
- Report
- Accession number :
- edsnas.19930017543
- Document Type :
- Report