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The remnants of galaxy formation from a panoramic survey of the region around M31

McConnachie, Alan W; Irwin, M. J.; Ibata, Rodrigo A; Dubinski, John; Widrow, L. M.; Martin, N F; Cote, P; Dotter, Aaron; Navarro, J F; Ferguson, A. M. N.; Fardal, Mark; Mackey, Alasdair


In hierarchical cosmological models, galaxies grow in mass through the continual accretion of smaller ones. The tidal disruption of these systems is expected to result in loosely bound stars surrounding the galaxy, at distances that reach 10-100 times the radius of the central disk. The number, luminosity and morphology of the relics of this process provide significant clues to galaxy formation history, but obtaining a comprehensive survey of these components is difficult because of their...[Show more]

CollectionsANU Research Publications
Date published: 2009
Type: Journal article
Source: Nature
DOI: 10.1038/nature08327


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