(Top) Dark matter rotation curve of DDO 154, with error bars. Dotted line (A) shows a fit to the inner parts of the rotation curve, adopting the dark matter halo structure as predicted by cosmological models. Dashed line (B) shows a dark matter halo fitted to the outer part of the rotation curve. Solid line shows the fit achieved with the two‐component MACHO model without adiabatic contraction, assuming dark matter halo parameters ﹩M_{0}=4\times 10^{9}\,M_{\odot }﹩ and ﹩R_{s}=4.5﹩ kpc. Lower dashed and dot‐dashed curves show the contribution to the rotation curve of the MACHO spheroid and the dark matter halo (C), respectively. (Bottom) Two‐component MACHO model with adiabatic contraction, adopting halo parameters ﹩M_{0}=3\times 10^{9}\,M_{\odot }﹩ and ﹩R_{s}=5.5﹩ kpc. Dashed curve shows the contribution by the MACHO spheroid. The dot‐dashed curve (D) and the dotted curve (C*) show the contribution of the dark matter halo after and before adiabatic contraction, respectively.