Cold dark matter halos must burn

High-quality optical rotation curves for a sample of low-luminousty spirals evidence that the dark halos around galaxies are inconsistent with the output of proper CDM simulations. In fact, dark halos enveloping stellar disks are structures with approximately a constant density out to the optical edges. This is in strong disagreement with the characteristic p(r) proportional to r(-1.5) CDM regime and severely challenges the "standard" CDM theory also because the halo density appears to be heated up, at gross variance with the hierarchical evolution of collision-free particles.