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Galaxy Disruption in a Halo of Dark Matter

Science  29 Aug 2003:
Vol. 301, Issue 5637, pp. 1217-1219
DOI: 10.1126/science.1089237

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Abstract

The relics of disrupted satellite galaxies have been found around the Milky Way and Andromeda, but direct evidence of a satellite galaxy in the early stages of disruption has remained elusive. We have discovered a dwarf satellite galaxy in the process of being torn apart by gravitational tidal forces as it merges with a larger galaxy's dark matter halo. Our results illustrate the morphological transformation of dwarf galaxies by tidal interaction and the continued buildup of galaxy halos.

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