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14-Structure formation 1 (Build up of large scale structure (on large…
14-Structure formation 1
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Dense gets denser
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Sphere collapses due to density fluctuation, the magnitude of the fluctuation increases
Jeans Length
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to be stable against collapse dynamical collapse time must be longer than the time for a pressure signal (sound speed) to cross cloud
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pre collapse timeline
z>3400
radiation dominated, inefficient collapse
1090<z<3440
matter dominated, efficient collapse of dark matter
z<1090
matter dom, baryonic matter falls into dm structures