Please use this identifier to cite or link to this item: http://hdl.handle.net/2307/263
Title: Large-scale non-Gaussian mass function and halo bias: tests on N-body simulations
Authors: Grossi, Margherita
Verde, Licia
Carbone, Carmelita
Dolag, Klaus
Branchini, Enzo
Iannuzzi, Francesca
Matarrese, Sabino
Moscardini, Lauro
Keywords: PRIMORDIAL NON-GAUSSIANITY
DARK-MATTER HALOES
EXCURSION SET MODEL
ELLIPSOIDAL COLLAPSE
INFLATIONARY MODELS
GALAXY FORMATION
EVOLUTION
CLUSTERS
FLUCTUATIONS
CONSTRAINTS
Issue Date: 2009
Publisher: Wiley-Blackwell Publishing, Inc
Abstract: The description of the abundance and clustering of haloes for non-Gaussian initial conditions has recently received renewed interest,motivated by the forthcoming large galaxy and cluster surveys, which can potentially yield constraints of the order of unity on the non-Gaussianity parameter f(NL). We present tests on N-body simulations of analytical formulae describing the halo abundance and clustering for non-Gaussian initial conditions. We calibrate the analytic non-Gaussian mass function of Matarrese, Verde & Jimenez and LoVerde et al. and the analytic description of clustering of haloes for non-Gaussian initial conditions on N-body simulations. We find an excellent agreement between the simulations and the analytic predictions if we make the corrections delta(c) -> delta(c)root q and delta(c) -> delta(c)q, where q similar or equal to 0.75, in the density threshold for gravitational collapse and in the non-Gaussian fractional correction to the halo bias, respectively. We discuss the implications of this correction on present and forecasted primordial non-Gaussianity constraints. We confirm that the non-Gaussian halo bias offers a robust and highly competitive test of primordial non-Gaussianity.
URI: http://hdl.handle.net/2307/263
ISSN: 0035-8711
DOI: 10.1111/j.1365-2966.2009.15150.x
Appears in Collections:A - Articolo su rivista
X_Dipartimento di Fisica 'Edoardo Amaldi'

Files in This Item:
File Description SizeFormat Existing users please Login
nong.pdf1.84 MBAdobe PDF    Request a copy
SFX Query Show full item record Recommend this item

Google ScholarTM

Check

Altmetric

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.