The nonlinear redshift space probability distribution function in models with local primordial non-Gaussianity

Details The nonlinear redshift space probability distribution function in models with local primordial non-Gaussianity The nonlinear redshift space probability distribution function in models with local primordial non-Gaussianity

2009-08-17

arxiv.org/abs/0908.2285v2

2010MNRAS.402.2397L

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

Matched version accepted by MNRAS

Scientific paper

We use the ellipsoidal collapse approximation to investigate the nonlinear redshift space evolution of the density field with primordial non-Gaussianity of the local f_{nl}-type. We utilize the joint distribution of eigenvalues of the initial non-Gaussian shear field and evaluate the evolved redshift space probability distribution function (PDF). It is shown that, similar to the real space analysis, the underdense tail of the nonlinear redshift space PDF differs significantly from that for Gaussian initial conditions. We also derive the lowest order correction of the Kaiser's formulain the presence of a non-zero f_{nl}.

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