Statistics – Computation
Scientific paper
Oct 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...380..320n&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 380, Oct. 20, 1991, p. 320-329. Research supported by SNSF and CONICET.
Statistics
Computation
165
Cooling Flows (Astrophysics), Dark Matter, Galactic Evolution, Galactic Structure, Gas Dynamics, Halos, Astronomical Models, Collisionless Plasmas, Computational Astrophysics, Elliptical Galaxies, Galactic Rotation
Scientific paper
The dynamical evolution of both collisionless 'dark' particles and a dissipative gaseous component in a flat universe is simulated in order to investigate the formation process of the luminous components of galaxies at the center of galactic dark halos. The present models assume that the gas amounts to 10 percent of the mass of the universe, and that both the gas and the dark matter are identically distributed in phase space at high redshifts. The results confirm previous suggestions that the merging history of the surrounding halo is a key factor in the determination of a galaxy's morphological type. The baryonic component is found to lose more angular momentum than could be predicted by dissipationless simulations. The formation of dense, slowly rotating baryonic cores at the center of galactic dark halos is observed, which explains the origin of the slow rotation and large densities observed in spheroids and elliptical galaxies.
Benz Willy
Navarro Julio F.
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