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The Void Abundance with Non-Gaussian Primordial Perturbations · Around

2008

The Void Abundance with Non-Gaussian Primordial Perturbations

Kamionkowski, Marc, Verde, Licia, Jimenez, Raul

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We use a Press-Schechter-like calculation to study how the abundance of voids changes in models with non-Gaussian initial conditions.

While a positive skewness increases the cluster abundance, a negative skewness does the same for the void abundance.
We determine the dependence of the void abundance on the non-Gaussianity parameter fnl for the local-model bispectrum-which approximates the bispectrum in some multi-field inflation models-and for the equilateral bispectrum, which approximates the bispectrum in e.g.
string-inspired DBI models of inflation.

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