COLA with massive neutrinos

Abstract

The effect of massive neutrinos on the growth of cold dark matter perturbations acts as a scale-dependent Newton's constant and leads to scale-dependent growth factors just as we often find in models of gravity beyond General Relativity. We show how to compute growth factors for $\Lambda$CDM and general modified gravity cosmologies combined with massive neutrinos in Lagrangian perturbation theory for use in COLA and extensions thereof. We implement this together with the grid-based massive neutrino method of Brandbyge and Hannestad in $\text{MG-PICOLA}$ and compare COLA simulations to full $N$-body simulations of $\Lambda$CDM and $f(R)$ gravity with massive neutrinos. Our implementation is computationally cheap if the underlying cosmology already has scale-dependent growth factors and it is shown to be able to produce results that match $N$-body to percent level accuracy for both the total and CDM matter power-spectra up to $k\lesssim 1h/$Mpc.

29 pages, 15 figures, 1 table, version accepted for publication in JCAP, added frame-lagging terms in 2LPT sections (results unaffected) and appendix on comparison to SPT

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Cited by in corpus (43)

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• Cosmic voids in modified gravity models with massive neutrinos
• Breaking degeneracies in modified gravity with higher (than 2nd) order weak-lensing statistics
• Weak Lensing Light-Cones in Modified Gravity simulations with and without Massive Neutrinos
• Distinguishing standard and modified gravity cosmologies with machine learning
• Reducing Noise in Cosmological N-body Simulations with Neutrinos
• A Lagrangian Perturbation Theory in the presence of massive neutrinos
• Lagrangian perturbation theory for modified gravity
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• On the road to percent accuracy V: the non-linear power spectrum beyond $\Lambda$CDM with massive neutrinos and baryonic feedback
• Fast computation of non-linear power spectrum in cosmologies with massive neutrinos
• A fast particle-mesh simulation of non-linear cosmological structure formation with massive neutrinos
• Clustering in Massive Neutrino Cosmologies via Eulerian Perturbation Theory
• Fast full N-body simulations of generic modified gravity: conformal coupling models
• Higher-order initial conditions with massive neutrinos
• Beyond two-point statistics: using the minimum spanning tree as a tool for cosmology
• Fast full $N$-body simulations of generic modified gravity: derivative coupling models
• NECOLA: Towards a Universal Field-level Cosmological Emulator
• Investigating the degeneracy between modified gravity and massive neutrinos with redshift-space distortions
• Euclid: The search for primordial features
• Fast Generation of Covariance Matrices for Weak Lensing
• $\text{Hi-COLA}$: Fast, approximate simulations of structure formation in Horndeski gravity
• Euclid: Modelling massive neutrinos in cosmology -- a code comparison
• Clustering and redshift-space distortions in modified gravity models with massive neutrinos
• Enabling matter power spectrum emulation in beyond-$\Lambda$CDM cosmologies with COLA
• Cosmological Vlasov-Poisson Simulations of Structure Formation with Relic Neutrinos: Nonlinear Clustering and the Neutrino Mass
• Fast generation of mock galaxy catalogues in modified gravity models with COLA
• Studying large-scale structure probes of modified gravity with COLA
• Does jackknife scale really matter for accurate large-scale structure covariances?
• Geodesic motion and phase-space evolution of massive neutrinos
• Sesame: A power spectrum emulator pipeline for beyond-$\Lambda$CDM models
• Revisiting Vainshtein Screening for fast N-body simulations
• The kinematic Sunyaev-Zel'dovich effect of the large-scale structure (II): the effect of modified gravity
• A field-level emulator for modified gravity
• Euclid preparation. Simulations and nonlinearities beyond $\Lambda$CDM. 1. Numerical methods and validation
• Refining the nonlinear modelling of primordial oscillatory features
• COmoving Computer Acceleration (COCA): $N$-body simulations in an emulated frame of reference
• Including relativistic and primordial Non-Gaussianity contributions in cosmological simulations by modifying the initial condition
• Fast Generation of Weak Lensing Maps in Modified Gravity with COLA
• nuGAN: Generative Adversarial Emulator for Cosmic Web with Neutrinos