| Dark Matter in Galaxy Clusters |
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| • | How
do we know it is there? |
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| – | Dynamical
estimates of cluster masses |
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| – | X-ray
emission/masses |
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| – | (Sunyaev-Zeldovich
Effect) |
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| – | (Gravitational
lensing) |
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| • | What
is the dark matter??? |
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| – | Baryons
vs. non-Baryons |
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