Galaxy Formation: Merger vs Gas Accretion
Cosmology and Nongalactic Astrophysics
2010-12-30 v1
Abstract
According to the hierarchical model, small galaxies form first and merge together to form bigger objects. In parallel, galaxies assemble their mass through accretion from cosmic filaments. Recently, the increased spatial resolution of the cosmological simulations have emphasised that a large fraction of cold gas can be accreted by galaxies. In order to compare the role of both phenomena and the corresponding star formation history, one has to detect the structures in the numerical simulations and to follow them in time, by building a merger tree.
Cite
@article{arxiv.1012.5802,
title = {Galaxy Formation: Merger vs Gas Accretion},
author = {Benjamin L'Huillier and Francoise Combes and Benoit Semelin},
journal= {arXiv preprint arXiv:1012.5802},
year = {2010}
}
Comments
2 pages, 2 figures, Proceedings SF2A 2010