Slides from the talk - CP3-Origins
Slides from the talk - CP3-Origins
Slides from the talk - CP3-Origins
SHOW LESS
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
Non-Gaussianity <strong>from</strong> Gravitational Instability<br />
A fundamental quantity: <strong>the</strong> matter overdensity<br />
δ(x) ≡<br />
ρ(x) − ¯ρ<br />
¯ρ<br />
≥−1<br />
At early times (z ~ 1000)fluctuations<br />
are small (σδ≪1):<br />
⟨δδ⟩≠0,<br />
⟨δδδ⟩≃0<br />
⟨δδδδ⟩≃0<br />
At late times fluctuations grow, σδ >1<br />
Non-Gaussianity is induced by<br />
gravitational evolution<br />
⟨δδ⟩≠0,<br />
⟨δδδ⟩≠0<br />
⟨δδδδ⟩≠0
Change language