BLACK-HOLE MODELS FOR THE DARK-MATTER IN DRACO AND URSA-MINOR

The stellar velocity dispersions of Draco and Ursa Minor have been use d to infer large dark matter halos with central mass densities that ar e two orders of magnitude larger than found in brighter galaxies. We o ffer a different dark matter model. We fit the star count profiles usi ng massive central black holes (1-2 x 10(7) M.) and investigate the ag reement between this model and the latest velocity data. Such black ho les produce the large observed velocity dispersions and create a densi ty and distinctive velocity cusp close to the center. Star counts reac hing the main sequence will lead to more accurate centering of the iso pleths and may reveal a more prominent cusp.