Dark Matter in Galaxies (and Beyond)		Ay 124
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Readings:

    o  BT chap. 10; GKK chap. 6, 10.

    *  IAU Symp. 117, "Dark Matter in the Universe"
       eds. Kormendy & Knapp (1987).  Dordrecht: Reidel.

    o  Trimble, V. 1987, Ann. Rev. Astr. Aph. 25, 425.

    ... + the multitude of other conference proceedings
        and research papers.


The Issues:

    o  Composition of the DM (e.g., baryonic vs. non-b.;
       is there more than one kind? different on diff. 
       scales?)

    o  Distribution of DM on different scales (galaxies,
       groups, clusters, LSS), absolute and relative to
       the visible matter.

    o  The total amount:        = ?


The Probes:

    On the scale of galaxies:  rotation curves (Sp),  
                               x-ray halos (E).

    On the scale of groups:  binary galaxies, internal
                             motions in groups.

    On the scale of clusters:  internal motions, 
                               x-ray gas.

    On larger scales:  velocity dispersion of galaxies,
                       large-scale streaming motions,
		       gravitational lensing phenomena.