Annu. Rev. Astron. Astrophys. 1994. 32:
531-590 Copyright © 1994 by Annual Reviews. All rights reserved |
A variety of constraints can be placed on the mass of any dark compact objects in the disk and halo of our own Galaxy by considering their dynamical effects. The constraints are usually calculated on the assumption that the objects are black holes but, as emphasized in Section 6.4, most of them also apply for dark clusters of smaller objects. There are also constraints for dark objects in clusters of galaxies or in the intergalactic medium, though these are weaker. The limits are summarized as upper limits on the density parameter B(M) for black holes of mass M in Figure 3, where the disk, halo, and cluster dark matter are assumed to have densities of 0.001, 0.1, and 0.2, respectively. Figure 3 updates and - in some respects corrects - Figure 1 of Carr (1978).