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Fig. 4.


Evolution of the cold, hot and wind gas during the first contact between the dwarf galaxy and the hot halo in a wind tunnel simulation with a wind temperature of 3.39 K, a density of 1.28 × 10−5 atom cm−3 and a velocity of 76.9 km s−1. The hot gas of the dwarf (Tw >  103 K) is shown in red, its cold gas (Tw <  103 K) in blue. The green colours trace the gas of the wind. This sequence shows how the hot dwarf gas is quickly stripped while its cold gas remains.

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