The development of gravitational instabilities - RESCEU

‣ Re-summation can be extended to any order
FB, Crocce, Scoccimarro, PRD, 2008
In the large k limit we have :
‣ Non-Gaussian initial conditions
‣ The Gamma-expansion is still valid.
‣ In the large k limit we now have :
G(k) → exp
[
−
Crocce, Sefusatti, FB, 2010
∞∑
p=2
〈(v.k) p 〉 c
p!
(e η − e η 0
) p ]
instead of
G(k) → exp
[
]
− 〈(v.k)2 〉 c
(e η − e η 0
) 2
2
for Gaussian initial conditions.
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