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Feedback and the formation of dwarf galaxy stellar haloes |
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| Authors: | G S Stinson J J Dalcanton † T Quinn S M Gogarten T Kaufmann J Wadsley |
| Institution: | Astronomy Department, University of Washington, Box 351580, Seattle, WA 98195-1580, USA;Department of Physics and Astronomy, McMaster University, Hamilton, Ontario, L8S 4M1, Canada;Department of Physics and Astronomy, University of California, Irvine, CA 92697, USA |
| Abstract: | Stellar population studies show that low-mass galaxies in all environments exhibit stellar haloes that are older and more spherically distributed than the main body of the galaxy. In some cases, there is a significant intermediate age component that extends beyond the young disc. We examine a suite of Smoothed Particle Hydrodynamic simulations and find that elevated early star formation activity combined with supernova feedback can produce an extended stellar distribution that resembles these haloes for model galaxies ranging from v |
| Keywords: | methods: N-body simulations galaxies: evolution galaxies: formation |