Julien LESGOURGUES (.pdf)
Julien LESGOURGUES (.pdf)
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What are they? they<br />
⇒ extended set of isocurvature modes:<br />
Bucher et al.<br />
2001<br />
perturbations of : baryons, 1 independent<br />
d.o.f<br />
CDM, tighly coupled photons (density)<br />
infinite hierarchy of<br />
free-streaming neutrinos: Legendre<br />
momenta<br />
(density, velocity, shear...)<br />
additional isocurvature mode from v ν ↔ v γ : « ν<br />
velocity »
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