1996/10/07 by Vladimir Avila-Reese, V. Ávila-Reese, Avila-Reese, Vladimir +3
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics (astro-ph) #Cosmology and Gravitation Theories #FOS: Physical sciences #Relativity and Gravitational Theory #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/9610045
Presented at the Conference "Dark and Visible Matter in Galaxies and Cosmological Implications" (Sesto, Italy, 2-5 July 1996),to appear in A.S.P. Conference Series, 8 pages, 5 figures, Latex, uses paspconf.sty, epsf.sty
arxiv created 1996/10/07 · openalex publication_date 1996/10/07 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The spherical gravitational collapse and virialization of arbitrary density fluctuations in an expanding universe is studied. In the context of the standard cosmological model and the peak ansatz, disk galaxies are supposed to be the product of "extended" gravitational collapses of regions surrounding local-maxima of the density fluctuation field. The substructure over the main profile (merging) is considered as a second-order phenomenon. The range and distribution of possible mass growth histories or accretion regimes for a given present-day mass are estimated and used as the initial condition for galaxy formation. Considering the effect of dark halo contraction due to disk formation, the final rotation curves are calculated. If the structural properties of dark halos are important in establishing the Hubble sequence's properties of visible galaxies, then this sequence is defined not only by the mass, but among other possible parameters, by the accretion regime.