Gas accretion as the origin of chemical abundance gradients in distant galaxies.


It has recently been suggested that galaxies in the early Universe could have grown through the accretion of cold gas, and that this may have been the main driver of star formation and stellar mass growth. Because the cold gas is essentially primordial, it has a very low abundance of elements heavier than helium (referred to as metallicity). If funnelled to… (More)
DOI: 10.1038/nature09451


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