Parameter space we explored for Au-23-85-50. The seven free parameters are the disk axis ratio q_disk (transformed from the inclination angle θ), the bar azimuthal angle φ, the mass-to-light ratio M_⋆/L, the dark matter concentration c, the dark matter mass M_dm, 10kpc within 10 kpc (transformed from the virial mass M₂₀₀), the inner density slope of dark matter γ, and the bar pattern speed Ω_p. The largest blue pentacle represents the best-fitting model with minimum chi-square χ_min², and other coloured dots represent models within the 3σ confidence level, with their χ² values indicated by the colour bar. The small black dots denote models outside of the 3σ confidence level. The green triangle indicates the true values of the free parameters, with the dark matter parameters c and γ are obtained by fitting the gNFW profile using dark matter particles located within 10 kpc.