Gravitational Theory and Dark Matter
The standard model for dark matter (coined cold-dark-matter) is extremely successful at large cosmological scales. However, when extrapolated at the smaller scales of galaxies, it faces a number of severe challenges. Dark matter at these scales is better explained by MOND (MOdified Newtonian Dynamics) which originally supposes a violation of the Newtonian law of gravity without dark matter. In this talk we first show that the phenomenology of MOND could result from dark matter, but endowed by a certain type of gravitational dipole moments polarized in the gravitational field of ordinary matter.