Kim Griest,
Physics Department,
University of California, San Diego,
La Jolla, CA 92093 USA
kgriest@physics.ucsd.edu
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We review some recent determinations of the amount of dark
matter on galactic and larger scales, with special attention to the
dark matter in the Milky Way. We then briefly review the
motivation for and basic physics of several dark matter candidates,
including Machos, Wimps, axions, and neutrinos. We then go into
more depth for two candidates, the neutralino from supersymmetry,
and the baryonic Macho candidate. For Machos we give a
description of the discovery of Machos via gravitational
microlensing and the interpretation of the results with respect
to the dark matter problem.
(Lectures presented at the International School of Physics ``Enrico
Fermi" Course ``Dark Matter in the Universe", Varenna, 25 July -
4 August, 1995.)