Large-scale 3D galaxy correlation function and non-Gaussianity
نویسندگان
چکیده
منابع مشابه
Large-scale velocities and primordial non-Gaussianity
We study the peculiar velocities of density peaks in the presence of primordial non-Gaussianity. Rare, high-density peaks in the initial density field can be identified with tracers such as galaxies and clusters in the evolved matter distribution. The distribution of relative velocities of peaks is derived in the large-scale limit using two different approaches based on a local biasing scheme. ...
متن کاملGalaxy-CMB and Galaxy-Galaxy Lensing on Large Scales: Sensitivity to Primordial Non-Gaussianity
A convincing detection of primordial non-Gaussianity in the local form of the bispectrum, whose amplitude is given by the ƒNL parameter, offers a powerful test of inflation. In this paper, we calculate the modification of two-point cross-correlation statistics of weak lensing—galaxy-galaxy lensing and galaxycosmic microwave background (CMB) crosscorrelation—due to ƒNL. We derive and calculate t...
متن کاملConstraints on local primordial non-Gaussianity from large scale structure
Recent work has shown that the local non-Gaussianity parameter fNL induces a scale dependent bias, whose amplitude is growing with scale. Here we first rederive this result within the context of the peak–background split formalism and show that it only depends on the assumption of universality of the mass function, assuming that the halo bias only depends on the mass. We then use the extended P...
متن کاملCan large-scale structure probe CMB-constrained non-Gaussianity?
The first year Wilkinson Microwave Anisotropy Probe (WMAP) set quantitative constraints on the amplitude of any primordial non-Gaussianity. We run a series of dark matter-only N-body simulations with the WMAP constraints to investigate the effect of the presence of primordial non-Gaussianity on large scale structures. The model parameters can be constrained using the observations of protocluste...
متن کاملStrongly scale-dependent non-Gaussianity
Cosmological inflation [1] has become the dominant paradigm to understand the initial conditions for the CMB anisotropies and large-scale structure (LSS) formation. This picture has recently received further spectacular confirmation by the Wilkinson Microwave Anisotropy Probe 5 yr set of data [2]. Present and future [3] experiments may be sensitive to the nonlinearities of the cosmological pert...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Cosmology and Astroparticle Physics
سال: 2014
ISSN: 1475-7516
DOI: 10.1088/1475-7516/2014/08/022