Cosmological perturbation theory using generalized Einstein-de Sitter cosmologies

Article Astronomy & Astrophysics

Accuracy of power spectra in dissipationless cosmological simulations

Sara Maleubre et al.

Summary: This study investigates the convergence of the matter power spectrum using large N-body simulations and proposes conservative bounds on the accuracy of N-body simulations for non-scale-free models.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2022)

Add to Collection

Article Astronomy & Astrophysics

The reach of next-to-leading-order perturbation theory for the matter bispectrum

Davit Alkhanishvili et al.

Summary: Comparing matter bispectrum derived with different perturbation theory methods at next-to-leading order with N-body simulation measurements, we find that the EFT models have the largest reach, standard perturbation theory has the shortest, but the advantage of EFT is weaker than in previous studies. It is difficult to unequivocally define a range of accuracy for models containing free parameters.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2022)

Add to Collection

Article Astronomy & Astrophysics

Cosmological analysis of three-dimensional BOSS galaxy clustering and Planck CMB lensing cross correlations via Lagrangian perturbation theory

Shi-Fan Chen et al.

Summary: We propose a formalism for jointly fitting pre-and post-reconstruction redshift-space clustering, baryon acoustic oscillations, and gravitational lensing. We analyze clustering measured by the Baryon Oscillation Spectroscopic Survey in combination with CMB lensing measured by Planck. The results provide valuable constraints on various cosmological parameters.

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS (2022)

Add to Collection

Article Astronomy & Astrophysics

Two-loop power spectrum with full time- and scale-dependence and EFT corrections: impact of massive neutrinos and going beyond EdS

Masatoshi Shoji et al.

Summary: In this study, we computed the density and velocity power spectra, taking into account the effect of time- and scale-dependent growth of massive neutrino perturbations as well as the departure from Einstein-de-Sitter dynamics. We found significant deviations from the commonly adopted approximate treatment, highlighting the importance of including these effects in the analysis.

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS (2022)

Add to Collection

Article Astronomy & Astrophysics

Perturbation theory of large scale structure in the ΛCDM Universe: Exact time evolution and the two-loop power spectrum

Matteo Fasiello et al.

Summary: In this paper, we provide exact analytic solutions for density and velocity fields in ACDM cosmology using Eulerian standard perturbation theory. The solutions are derived to all orders and have a separable form in time and momenta at each perturbative order.

PHYSICAL REVIEW D (2022)

Add to Collection

Article Astronomy & Astrophysics

Loop corrections to the power spectrum for massive neutrino cosmologies with full time- and scale-dependence

Mathias Garny et al.

Summary: The study presents an algorithm that takes into account the full time- and scale-dependence of fluid dynamics to assess the impact of neutrino free-streaming on the matter power spectrum. Deviations above 1% for k > 0.15 h/Mpc at z = 0 and sub-percent agreement on weakly non-linear scales at z = 0.5 were found when using a commonly adopted scheme with cold dark matter+baryon perturbations and EdS kernels for computing non-linear corrections.

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS (2021)

Add to Collection

Article Astronomy & Astrophysics

Clustering in massive neutrino cosmologies via Eulerian Perturbation Theory

Alejandro Aviles et al.

Summary: An Eulerian Perturbation Theory is introduced to study the clustering of tracers in cosmologies with massive neutrinos, incorporating Effective Field Theory counterterms, IR-resummations, and biasing scheme for one-loop redshift-space power spectrum calculation. Comparisons with synthetic halo catalogues show good agreement on scales up to 0.25 h Mpc(-1), but higher wave-numbers lead to inaccurate estimation of the linear bias parameter. An accurate approximation method is derived to reduce computational cost for loop corrections and accelerate calculations with FFTLoG methods.

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS (2021)

Add to Collection

Article Astronomy & Astrophysics

The Lyα forest flux correlation function: a perturbation theory perspective

Shi-Fan Chen et al.

Summary: The Lyα forest is a valuable tool for mapping large-scale structures at high redshifts and constraining the distance-redshift relation. By expanding the large-scale correlations in the Lyα forest as cumulants of the optical depth field and relating it to the density field through bias expansion, a direct connection between observable and matter fluctuation statistics is established. Small-scale physics influences predictions, velocity bias origins, and renormalization of large-scale bias coefficients, with both isotropic and anisotropic contributions receiving input from small-scale physics.

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS (2021)

Add to Collection

Article Astronomy & Astrophysics

Two-loop bispectrum of large-scale structure

Tobias Baldauf et al.

Summary: In this work, a two-loop perturbative description of the bispectrum within an effective field theory (EFT) framework is presented, demonstrating the effectiveness of EFT parameters in absorbing UV sensitivity of two-loop contributions. The study shows good agreement with N-body simulations, with two-loop contributions becoming relevant at k approximate to 0.07h Mpc(-1), and percent-level agreement extending from 0.08 to 0.15h Mpc(-1) from one to two loops at z = 0.

PHYSICAL REVIEW D (2021)

Add to Collection

Article Astronomy & Astrophysics

Quantifying resolution in cosmological N-body simulations using self-similarity

Michael Joyce et al.

Summary: The researchers demonstrate that testing for self-similarity in scale-free simulations can quantify the resolution at small scales of cosmological N-body simulations. They show that the well-converged scales exhibit accuracy below 1 percent, and the spatial resolution is primarily determined by mass resolution. This method can potentially infer resolution limits for non-scale-free simulations.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2021)

Add to Collection

Article Astronomy & Astrophysics

Precise calibration of the one-loop bispectrum in the effective field theory of large scale structure

Theodore Steele et al.

Summary: In this paper, a detailed test and calibration of matter bispectrum counterterms in the effective field theory of large scale structure against N-body simulations was conducted, revealing deviations of new counterterms from the shape suggested by the UV limit of relevant bispectrum contributions. The study also showed the necessity of using ACDM growth factors for accurate one-loop counterterm constraints due to deviations in growth factors arising from time integration inaccuracies in N-body simulations.

PHYSICAL REVIEW D (2021)

Add to Collection

Article Biochemical Research Methods

SciPy 1.0: fundamental algorithms for scientific computing in Python

Pauli Virtanen et al.

NATURE METHODS (2020)

Add to Collection

Article Astronomy & Astrophysics

Consistent modeling of velocity statistics and redshift-space distortions in one-loop perturbation theory

Shi-Fan Chen et al.

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS (2020)

Add to Collection

Article Astronomy & Astrophysics

A Lagrangian perturbation theory in the presence of massive neutrinos

Alejandro Aviles et al.

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS (2020)

Add to Collection

Review Multidisciplinary Sciences

Array programming with NumPy

Charles R. Harris et al.

NATURE (2020)

Add to Collection

Article Astronomy & Astrophysics

Overview of the DESI Legacy Imaging Surveys

Arjun Dey et al.

ASTRONOMICAL JOURNAL (2019)

Add to Collection

Article Astronomy & Astrophysics

LSST: From Science Drivers to Reference Design and Anticipated Data Products

Zeljko Ivezic et al.

ASTROPHYSICAL JOURNAL (2019)

Add to Collection

Article Astronomy & Astrophysics

Nonlinear evolution of initially biased tracers in modified gravity

Alejandro Aviles et al.

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS (2018)

Add to Collection

Article Astronomy & Astrophysics

Modeling CMB lensing cross correlations with CLEFT

Chirag Modi et al.

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS (2017)

Add to Collection

Article Astronomy & Astrophysics

Nonlinear fields in generalized cosmologies

Matteo Fasiello et al.

PHYSICAL REVIEW D (2016)

Add to Collection

Article Astronomy & Astrophysics

Constructing perturbation theory kernels for large-scale structure in generalized cosmologies

Atsushi Taruya

PHYSICAL REVIEW D (2016)

Add to Collection

Article Astronomy & Astrophysics

The bispectrum in the Effective Field Theory of Large Scale Structure

Tobias Baldauf et al.

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS (2015)

Add to Collection

Article Astronomy & Astrophysics

Planck 2013 results. XVI. Cosmological parameters

P. A. R. Ade et al.

ASTRONOMY & ASTROPHYSICS (2014)

Add to Collection

Article Astronomy & Astrophysics

The 2-loop matter power spectrum and the IR-safe integrand

John Joseph M. Carrasco et al.

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS (2014)

Add to Collection

Article Astronomy & Astrophysics

Self-similarity and stable clustering in a family of scale-free cosmologies

David Benhaiem et al.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2014)

Add to Collection

Article Astronomy & Astrophysics

On the renormalization of the effective field theory of large scale structures

Enrico Pajer et al.

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS (2013)

Add to Collection

Article Astronomy & Astrophysics

Galilean invariance and the consistency relation for the nonlinear squeezed bispectrum of large scale structure

Marco Peloso et al.

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS (2013)

Add to Collection

Article Astronomy & Astrophysics

Lagrangian perturbations and the matter bispectrum I: fourth-order model for non-linear clustering

Cornelius Rampf et al.

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS (2012)

Add to Collection

Article Physics, Particles & Fields

The effective field theory of cosmological large scale structures

John Joseph M. Carrasco et al.

JOURNAL OF HIGH ENERGY PHYSICS (2012)

Add to Collection

Article Astronomy & Astrophysics

Nonlinear perturbation theory integrated with nonlocal bias, redshift-space distortions, and primordial non-Gaussianity

Takahiko Matsubara

PHYSICAL REVIEW D (2011)

Add to Collection

Article Astronomy & Astrophysics

Critical look at cosmological perturbation theory techniques

Jordan Carlson et al.

PHYSICAL REVIEW D (2009)

Add to Collection

Article Physics, Multidisciplinary

Third-Order Density Perturbation and One-Loop Power Spectrum in Dark-Energy-Dominated Universe

Ryuichi Takahashi

PROGRESS OF THEORETICAL PHYSICS (2008)

Add to Collection

Article Astronomy & Astrophysics

Dark matter clustering: A simple renormalization group approach

Patrick McDonald

PHYSICAL REVIEW D (2007)

Add to Collection

Article Astronomy & Astrophysics

Renormalized cosmological perturbation theory

M Crocce et al.

PHYSICAL REVIEW D (2006)

Add to Collection

Review Physics, Multidisciplinary

Large-scale structure of the Universe and cosmological perturbation theory

F Bernardeau et al.

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS (2002)

Add to Collection

Cosmological perturbation theory using generalized Einstein-de Sitter cosmologies

Related references

Export Citation

Share Paper