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Suzaku Observations of Galaxy Groups (and related systems)

Suzaku Observations of Galaxy Groups (and related systems)

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Matter in the Universe<br />

(the modern view)<br />

• Most <strong>of</strong> the matter in the universe is dark matter,<br />

collapsed into a hierarchy (10 7 -10 15 M ) <strong>of</strong> halos<br />

• Galaxies are embedded in halos (that may be<br />

embedded in larger halos…)<br />

• Larger halos have more galaxies that move faster<br />

σ<br />

M<br />

richness<br />

Becker et al. 2007

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