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Effect of primordial non-Gaussianity on halo bias and mass function.

presentation
posted on 2023-06-07, 20:03 authored by Vincent Desjacques, Uroš Seljak, Ilian IlievIlian Iliev
We discuss the effect of quadratic and cubic local non-Gaussianity on the mass function and bias of dark matter halos extracted from cosmological N-body simulations. This type of non-Gaussianity induces a k-dependent bias in the large-scale clustering of rare objects. While we find that at low wavenumbers k<0.03 hMpc-1 the theory and the simulations agree well with each other for biased halos with b(M)>1.5, including a scale independent correction to the non-Gaussian bias improves the agreement on small scales where the k-dependent effect becomes rapidly negligible. Using available large-scale structure data, we obtain a limit on the size of the cubic nonlinear parameter of -3.5×105< gNL<8.2×105. Future observations shall improve this bound by 1¿2 orders of magnitude

History

Publication status

  • Published

Issue

1

Volume

1241

Page range

826-835

Pages

10.0

Presentation Type

  • paper

Event name

INVISIBLE UNIVERSE

Event location

Paris, France. 29 June - 10 July 2009

Event type

conference

ISBN

978-0-7354-0789-3

Department affiliated with

  • Physics and Astronomy Publications

Full text available

  • No

Peer reviewed?

  • Yes

Editors

A Fuözfa, J.-M. Alimi

Legacy Posted Date

2012-02-06

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