Large-scale homogeneity vs. small- scale inhomogeneity: testing ...
Large-scale homogeneity vs. small- scale inhomogeneity: testing ...
Large-scale homogeneity vs. small- scale inhomogeneity: testing ...
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• Nature of dark energy<br />
Peculiar Velocities as a cosmology<br />
− Expansion history H(z)<br />
− Growth of structure f=Ω m (z) γ<br />
• PVs are direct probe of gravity<br />
− Can test General Relativity, modified<br />
gravity<br />
− β=f/b : redshift- space distortion<br />
parameter, from combination of<br />
velocity & density<br />
• Nature of dark matter<br />
− Particle nature<br />
− Nature & evolution of structure<br />
• σ 8 , Ω m constraints<br />
• Tests of backreaction<br />
01/18/2013<br />
probe I<br />
Image: NASA/WMAP Science team<br />
Morag I. Scrimgeour 34