  We demonstrate that non-gravitational interactions between dark matter and
baryonic matter can affect structural properties of galaxies. Detailed galaxy
simulations and analytic estimates demonstrate that dark matter which collects
inside white dwarf stars and ignites Type Ia supernovae can substantially alter
star formation, stellar feedback, and the halo density profile through a dark
matter-induced baryonic feedback process, distinct from usual supernova
feedback in galaxies.
