Dwarf Galaxy Star Formation Histories in Local Group Cosmological Simulations
Author | : Ruth A. R. Digby |
Publisher | : |
Total Pages | : |
Release | : 2019 |
ISBN-10 | : OCLC:1199628996 |
ISBN-13 | : |
Rating | : 4/5 (96 Downloads) |
Book excerpt: Dwarf galaxies are powerful tools in the study of galactic evolution. As the most numerous galaxies in the universe, they probe a diverse range of environments: some exist in near-isolation, allowing us to study how a galaxy's evolution depends on its intrinsic properties. Others have been accreted by larger galaxies and show the impact of environmental processes such as tidal stripping. Because dwarf galaxies have shallow potential wells, these processes leave strong signatures in their star formation histories (SFHs). We use state-of-the-art cosmological hydrodynamical simulations to study the evolution of dwarf galaxies in Local Group analogues. Their SFHs are remarkably diverse, but also show robust average trends with stellar mass and environment. Low- mass isolated dwarfs (10^5