Projected density profiles of rotating BEC-ULDM halos for particle masses m = 2.92 × 10⁻²² eV (left), 10⁻²⁰ eV (middle), and 10⁻¹⁸ eV (right), obtained by scaling the same dimensionless profile discussed in the Appendix. In each column, the angular velocity increases from top to bottom, with its value shown in each panel. The emergence of quantized vortices (underdensity regions highlighted by dashed circles in the upper right quadrant in the leftmost panel) is evident as the rotation speed increases.