Halo properties obtained from the posteriors of the FDM fits to the rotation curves of the LTs galaxies for a fixed axion mass m_a = 1.9 × 10⁻²³ eV. Gray-colored points are galaxies for which both median and maximum posterior values of r_t are within the observed range, while gold-colored are soliton-dominated by virtue of not satisfying that condition. Uncertainties in the data points describe the credible intervals at 68% (solid) and 95% (dashed) CL. Uncertainties in the theoretical bands refer to the 1 and 2σ scatter in the predictions. Top-left: M_c − M_h relation compared to the region allowed by Eq. (15) and the prediction in Eq. (14) from Schive et al. (2014b; dotted line). Top-right: c − M_h relation compared to Eq. (16) and to the prediction in CDM, Eq. (17) from Dutton & Macciò (2014) with σ = 0.16 dex (gray dashed line). Bottom-left: Stellar-to-halo mass relation from abundance matching compared to the FDM prediction using Eq. (18), and the CDM predictions from Behroozi et al. (2019; dashed gray line) and Brook et al. (2014; dot-dashed line) with a reference σ = 0.30 dex scatter in both cases. Bottom-right: Expected number of halos with M_h ≲ 10¹¹ M_⊙ in a Local Group volume of radius 1.8 Mpc predicted in FDM as a function of m_a, using Eq. (18) and calibrated with the CDM prediction of the HMF from Brook et al. (2014). This is compared to the HMF from Schive et al. (2016; dashed line). For the CDM prediction, we take 10⁹ ≲ M_h ≲ 10¹¹ M_⊙. The dot-dashed line and gray bands represent the mean and the 68% and 95% CL regions for the axion mass in Eq. (23).