2014/01/31 by Hans J. T. Buist, A. Helmi, Amina Helmi · 1 citation
Physics and Astronomy · #Cosmology and Gravitation Theories #Galaxies: Formation, Evolution, Phenomena #Scientific Research and Discoveries #astro-ph.CO #astro-ph.GA
paper · pdf · doi:10.1051/0004-6361/201323059
5 pages, 4 figures; example figures replaced by their correct versions. Accepted for publication in A&A
arxiv created 2014/02/07 · openalex publication_date 2014/02/08 · arxiv updated 2014/03/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
We present a new simple functional form to model the evolution of a spherical mass distribution in a cosmological context. Two parameters control the growth of the system and this is modelled using a redshift-dependent exponential for the scale mass and scale radius. In this new model, systems form inside out and the mass of a given shell can be made never to decrease, as generally expected. This feature makes it more suitable for studying the smooth growth of galactic potentials or cosmological halos than other parametrizations often used in the literature. This is further confirmed through a comparison to the growth of dark matter halos in the Aquarius simulations.