Statistics – Computation
Scientific paper
May 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991mnras.250...54l&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 250, May 1, 1991, p. 54-68. Research supported by Minis
Statistics
Computation
41
Computerized Simulation, Galactic Evolution, Gravitational Collapse, Many Body Problem, Computational Astrophysics, Density (Mass/Volume), Elliptical Galaxies, Energy Dissipation, Mass Distribution
Scientific paper
A large set of numerical simulations has been performed by using two different N-body codes to derive detailed properties of the end-product of dissipationless collapse. Three classes of initial mass distribution have been adopted, characterized by different inhomogeneity scales, with velocity dispersion corresponding to a virial ratio in a range of 0.0005-0.2. The results show that the phase space properties of the final equilibrium state depend strongly on the initial mass distribution. In particular, when the density profile has a long radial tail, the final projected density is in good agreement with the R exp 1/4 law, up to 16 mag in the best fit. The full three-dimensional result does not give any support to the negative temperature model for the phase space distribution function.
Londrillo Pasquale
Messina Antonio
Stiavelli Massimo
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