REVIEW 5 cited by
The abundance of high-redshift objects as a probe of non-Gaussian initial conditions
Not yet reviewed by Pith; the record is open.
This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.
SPECIMEN: schema-true, not a live event
T0 review · schema-true
One-sentence machine reading of the paper's core claim.
pith:XXXXXXXX · record.json · timestamp
abstract
The observed abundance of high-redshift galaxies and clusters contains precious information about the properties of the initial perturbations. We present a method to compute analytically the number density of objects as a function of mass and redshift for a range of physically motivated non-Gaussian models. In these models the non-Gaussianity can be dialed from zero and is assumed to be small. We compute the probability density function for the smoothed dark matter density field and we extend the Press and Schechter approach to mildly non-Gaussian density fields. The abundance of high-redshift objects can be directly related to the non-Gaussianity parameter and thus to the physical processes that generated deviations from the Gaussian behaviour. Even a skewness parameter of order 0.1 implies a dramatic change in the predicted abundance of $z\gap 1$ objects. Observations from NGST and X-ray satellites (XMM) can be used to accurately measure the amount of non-Gaussianity in the primordial density field.
Forward citations
Cited by 5 Pith papers
-
Ab Initio Cosmological Simulations: From Inflation to Present-Day Structure Formation
Nonlinear axion-U(1) inflation, simulated on a lattice and fed into N-body simulations, boosts small-scale structure and high-redshift halo counts by up to ~200% relative to standard single-field initial conditions.
-
The dark matter halo mass function in the $\Lambda\mathrm{CDM}$ cosmology at all times and over all scales -- from planetary to galaxy cluster masses
A Reed-based fitting formula for the ΛCDM halo mass function, accurate to a few percent from 10^{-6} to 10^{15.5} M_⊙ and z=0–30, obtained via nested VVV simulations plus a new subsampling reconstruction.
-
Empirical estimates of how massive galaxies can be in {\Lambda}CDM
Empirical upper limits on galaxy stellar masses from extreme value statistics, after correcting for Eddington bias and halo mass scatter, remain below the theoretical baryonic maximum of 0.16 times halo mass at all re...
-
Reconstructing Primordial Curvature Perturbations via Scalar-Induced Gravitational Waves with LISA
LISA can reconstruct the primordial curvature power spectrum from scalar-induced gravitational waves, with percent-level precision near the peak and Bayesian tests separating SIGWs from other sources.
-
A $(D_\tau,D_x)$-manifold with $N$-correlators of $N_t$-objects
Constructs a (D_τ,D_x)-manifold with N-correlators of N_t-objects using field theory, topology, algebra, statistics and Fourier transforms, and discusses applicability across cosmological scales.
Discussion (0). Continue with ORCID to comment.