Dissipative Process as a Mechanism of Differentiating Internal Structures between Dwarf and Normal Elliptical Galaxies in a Cold Dark Matter Universe
arXiv:astro-ph/9812282Publication · DOI
Approach
Three-dimensional N-body/SPH calculations combine dynamics, chemistry and stellar-population modelling for galaxies embedded in dark haloes.
Main result
Strong mass loss in dwarf models produces diffuse systems with exponential light profiles and outward-reddening colours. Deeper normal-galaxy potentials retain centrally concentrated structures with opposite colour gradients.
Scientific implications
The proposed distinction arises from cooling and feedback operating in different potential wells.
Scope and limitations
The model offers a physical pathway under its initial conditions and prescriptions; observed ellipticals also have varied assembly histories.