Assembly Histories and Observational Properties of Simulated Early-type Galaxies
Abstract
We demonstrate that massive simulated galaxies assemble in two phases, with the initial growth dominated by compact in situ star formation, whereas the late growth is dominated by accretion of old stars formed in subunits outside the main galaxy. We also show that 1) gravitational feedback strongly suppresses late star formation in massive galaxies contributing to the observed galaxy colour bimodality that 2) the observed galaxy downsizing can be explained naturally in the two-phased model and finally that 3) the details of the assembly histories of massive galaxies are directly connected to their observed kinematic properties.
Keywords
Cite
@article{arxiv.1210.6438,
title = {Assembly Histories and Observational Properties of Simulated Early-type Galaxies},
author = {Peter H. Johansson},
journal= {arXiv preprint arXiv:1210.6438},
year = {2015}
}
Comments
4 pages, 3 figures. To appear in the Proceedings of IAU Symposium No. 295: "The intriguing life of massive galaxies", D. Thomas, A. Pasquali and I. Ferreras, eds