Copyright © 1994 by Annual Reviews. All rights reserved
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| 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).
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Figure 3. A summary of the dynamical
constraints on the density parameter
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