Galaxy gas mass content versus its V -band luminosity at z = 0. For all galaxies, if present, the cold neutral gas phase (T < 10′000 K) found inside the tidal radius r_t is shown with blue circles. The red circles correspond to the hot halo gas (T > 10′000 K) which extend up to the virial radius r₂₀₀. For comparison, the mass of neutral hydrogen (HI) observed in some of the Milky Way and M31 satellites is shown in black. For Sculptor and Sextans, we used the upper limits detection values as given by McConnachie (2012).