Slides from the talk - CP3-Origins
Slides from the talk - CP3-Origins
Slides from the talk - CP3-Origins
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The matter bispectrum and PNG: large scales<br />
At large scales I can approximate <strong>the</strong> matter bispectrum with <strong>the</strong> tree-level expression on PT:<br />
B(k 1 ,k 2 ,k 3 ) B 0 + B tree<br />
G [P 0 ]<br />
Primordial<br />
component<br />
Gravity-induced<br />
component<br />
1.4<br />
1.2<br />
k 1 =0.01 h Mpc −1 , k 2 =1.5 k 1<br />
Reduced bispectrum as a function of<br />
<strong>the</strong> angle between two wavenumbers<br />
Qk 1 ,k 2 ,Θ<br />
1.0<br />
0.8<br />
0.6<br />
0.4<br />
0.2<br />
Gravity<br />
Initial, f NL 100<br />
Gravity Initial<br />
Primordial component for<br />
local non-Gaussianity:<br />
large contribution in <strong>the</strong><br />
squeezed limit!<br />
The primordial component has<br />
a different dependence on <strong>the</strong><br />
shape of <strong>the</strong> triangular<br />
configurations<br />
0.0 0.2 0.4 0.6 0.8 1.0<br />
ΘΠ<br />
and it is specific to <strong>the</strong> non-Gaussian<br />
model (local, equilateral, orthogonal ...)
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