Astronomy and Astrophysics – Astrophysics – Cosmology and Extragalactic Astrophysics
Scientific paper
2011-02-07
JCAP08(2011)003
Astronomy and Astrophysics
Astrophysics
Cosmology and Extragalactic Astrophysics
26 pages, 5 figures; v2: typos corrected, references added; v3 references added, minor corrections and changes to text, matche
Scientific paper
Primordial non-Gaussianity has emerged as one of the most promising probes of the inflationary epoch. While the cosmic microwave background and large-scale halo bias currently provide the most stringent constraints on the non-Gaussian parameter fNL, the abundance of dark matter halos is a complementary probe which may allow tests of Gaussianity which are independent of the precise form of non-Gaussian initial conditions. We study the halo mass function in N-body simulations with a range of non-Gaussian initial conditions. In addition to the usual fNL model, we consider gNL Phi^3-type non-Gaussianity and models where the 4-point amplitude tauNL is an independent parameter. We introduce a new analytic form for the halo mass function in the presence of primordial non-Gaussianity, the "log-Edgeworth" mass function, and find good agreement with the N-body simulations. The log-Edgeworth mass function introduces no free parameters and can be constructed from first principles for any model of primordial non-Gaussianity.
LoVerde Marilena
Smith Kendrick M.
No associations
LandOfFree
The Non-Gaussian Halo Mass Function with fNL, gNL and tauNL does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The Non-Gaussian Halo Mass Function with fNL, gNL and tauNL, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Non-Gaussian Halo Mass Function with fNL, gNL and tauNL will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-501565