Non-Gaussianity from Large-Scale Structure Surveys

Abstract

With the advent of galaxy surveys which provide large samples of galaxies or galaxy clusters over a volume comparable to the horizon size (SDSS-III, HETDEX, Euclid, JDEM, LSST, Pan-STARRS, CIP etc.) or mass-selected large cluster samples over a large fraction of the extra-galactic sky (Planck, SPT, ACT, CMBPol, B-Pol), it is timely to investigate what constraints these surveys can impose on primordial non-Gaussianity. I illustrate here three different approaches: higher-order correlations of the three dimensional galaxy distribution, abundance of rare objects (extrema of the density distribution), and the large-scale clustering of halos (peaks of the density distribution). Each of these avenues has its own advantages, but, more importantly, these approaches are highly complementary under many respects.

20 pages, 8 figures, submitted to the special issue "Testing the Gaussianity and Statistical Isotropy of the Universe" of Advances in Astronomy

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Cited by in corpus (36)

• Cosmology and Fundamental Physics with the Euclid Satellite
• Cosmology and fundamental physics with the Euclid satellite
• Large-Scale Galaxy Bias
• Primordial Non-Gaussianities from Inflation Models
• N-body simulations with generic non-Gaussian initial conditions I: Power Spectrum and halo mass function
• The Scalar Chemical Potential in Cosmological Collider Physics
• Consistently violating the non-Gaussian consistency relation
• N-body simulations with generic non-Gaussian initial conditions II: Halo bias
• The potential of X-ray cluster surveys to constrain primordial non-Gaussianity
• Implications of multiple high-redshift galaxy clusters
• Matter bispectrum in cubic Galileon cosmologies
• Imprints of primordial non-Gaussianity on the number counts of cosmic shear peaks
• Inflationary signatures of single-field models beyond slow-roll
• Hunting high and low: Disentangling primordial and late-time non-Gaussianity with cosmic densities in spheres
• Oscillations in the Primordial Bispectrum: Mode Expansion
• Local primordial non-Gaussianity from the large-scale clustering of photometric DESI luminous red galaxies
• Measuring redshift through X-ray spectroscopy of galaxy clusters: results from Chandra data and future prospects
• Baryon history and cosmic star formation in non-Gaussian cosmological models: numerical simulations
• The squeezed matter bispectrum covariance with responses
• Universal Non-Gaussian Initial Conditions for N-body Simulations
• Large Scale Anisotropic Bias from Primordial non-Gaussianity
• Primordial non-Gaussianity in the bispectra of large-scale structure
• A critical analysis of high-redshift, massive galaxy clusters: I
• Gas distribution, metal enrichment, and baryon fraction in Gaussian and non-Gaussian universes
• A numerical study of the effects of primordial non-Gaussianities on weak lensing statistics
• Late time sky as a probe of steps and oscillations in primordial Universe
• Non-Gaussian bias: insights from discrete density peaks
• Non-Gaussian Shape Discrimination with Spectroscopic Galaxy Surveys
• Modification of the halo mass function by kurtosis associated with primordial non-Gaussianity
• Simultaneous effect of Modified Gravity and Primordial Non-Gaussianity in Large Scale Structure Observations
• Scale-dependent Bias from the Reconstruction of Non-Gaussian Distributions
• Scale-dependent bias due to primordial vector fields
• Non-Gaussianity in the Cosmic Microwave Background Induced by Dipolar Dark Matter
• Hydrodynamical chemistry simulations of the SZ effect and the impacts from primordial non-Gaussianities
• Effect of Priomordial non-Gaussianities on Galaxy Clusters Scaling Relations
• VST ATLAS Galaxy Cluster Catalogue I: cluster detection and mass calibration