Time evolution of the gas fraction of the dwarf galaxy h159 evolving through a wind tunnel simulation (see Table 2 for the list of parameters). Left panel: hot gas fraction contained in one virial radius. Right panel: cold gas fraction contained in 0.1 virial radius. The colour of each line reflect the corresponding βt. In both panels, the green and black lines correspond to the isolated and fiducial wind tunnel model respectively. A moving average has been applied with a gaussian kernel (standard deviation of ∼100 Myr in a window of −500 to 500 Myr) to reduce the noise. Due to this filter, the earliest times are removed and the different curves start at different fraction.
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