The Lyman-alpha forest in f(R) modified gravity

Abstract

In this work, we analyze the Lyman-$\alpha$ forest in cosmological hydrodynamical simulations of chameleon-type f(R) gravity with the goal to assess whether the impact of such models is detectable in absorption line statistics. We carry out a set of hydrodynamical simulations with the cosmological simulation code MG-GADGET, including star formation and cooling effects, and create synthetic Lyman-$\alpha$ absorption spectra from the simulation outputs. We statistically compare simulations with f(R) and ordinary general relativity, focusing on flux probability distribution functions (PDFs) and flux power-spectra, an analysis of the column density and line width distributions, as well as the matter power spectrum. We find that the influence of f(R) gravity on the Lyman-$\alpha$ forest is rather small. Even models with strong modifications of gravity, like $|{\bar{f}}_{R0}|=10^{-4}$, do not change the statistical Lyman-$\alpha$ properties by more than 10%. The column density and line width distributions are hardly affected at all. It is therefore not possible to get competitive constraints on the background field $f_R$ using current observational data. An improved understanding of systematics in the observations and a more accurate modeling of the baryonic/radiative physics would be required to allow this in the future. The impact of f(R) on the matter power spectrum in our results is consistent with previous works.

arXiv comment10 pages, 7 figures, submitted to MNRAS

References in corpus (42)

• The cosmological simulation code GADGET-2
• Models of f(R) Cosmic Acceleration that Evade Solar-System Tests
• Chameleon Cosmology
• Radiative transfer in a clumpy universe: IV. New synthesis models of the cosmic UV/X-ray background
• Cosmological SPH simulations: The entropy equation
• Symmetron Fields: Screening Long-Range Forces Through Local Symmetry Restoration
• Quintessence as a run-away dilaton
• The Lyman-alpha Forest Power Spectrum from the Sloan Digital Sky Survey
• Detection of Extended He II Reionization in the Temperature Evolution of the Intergalactic Medium
• The Cosmological Impact of Luminous TeV Blazars I: Implications of Plasma Instabilities for the Intergalactic Magnetic Field and Extragalactic Gamma-Ray Background
• HeII Reionization and its Effect on the IGM
• Non-linear Evolution of f(R) Cosmologies III: Halo Statistics
• ECOSMOG: An Efficient Code for Simulating Modified Gravity
• A Direct Precision Measurement of the Intergalactic Lyman-alpha Opacity at 2<z<4.2
• Non-linear evolution of f(R) cosmologies II: power spectrum
• N-body Simulations for f(R) Gravity using a Self-adaptive Particle-Mesh Code
• Modified Gravity-GADGET: A new code for cosmological hydrodynamical simulations of modified gravity models
• A Refined Measurement of the Mean Transmitted Flux in the Ly-alpha Forest over 2 < z < 5 Using Composite Quasar Spectra
• Non-linear evolution of f(R) cosmologies I: methodology
• Possible evidence for an inverted temperature-density relation in the intergalactic medium from the flux distribution of the Lyman-alpha forest
• An improved measurement of the flux distribution of the Ly-alpha forest in QSO absorption spectra: the effect of continuum fitting, metal contamination and noise properties
• Dynamical Masses in Modified Gravity
• The nonlinear matter and velocity power spectra in f(R) gravity
• Redshift space distortions in f(R) gravity
• ISIS: a new N-body cosmological code with scalar fields based on RAMSES. Code presentation and application to the shapes of clusters
• Cluster Density Profiles as a Test of Modified Gravity
• Voigt-Profile Analysis of the Lyman-alpha Forest in a Cold Dark Matter Universe
• Cluster Abundance in f(R) Gravity Models
• Cosmological and astrophysical constraints from the Lyman-alpha forest flux probability distribution function
• Relativistic scalar fields and the quasi-static approximation in theories of modified gravity
• The imprint of inhomogeneous HeII reionization on the HI and HeII Ly-alpha forest
• Constraining models of $f(R)$ gravity with Planck and WiggleZ power spectrum data
• Chameleon f(R) gravity in the virialized cluster
• The Lyman-alpha forest in a blazar-heated Universe
• Scaling relations and mass bias in hydrodynamical f(R) gravity simulations of galaxy clusters
• Chameleon Halo Modeling in f(R) Gravity
• Testing Gravity with the Stacked Phase Space around Galaxy Clusters
• The Integrated Sachs-Wolfe effect in $f(R)$ gravity
• The Lyman alpha forest flux probability distribution at z>3
• A Fast Route to Non-Linear Clustering Statistics in Modified Gravity Theories
• Sample variance and Lyman-alpha forest transmission statistics
• Semi-analytic galaxy formation in f(R)-gravity cosmologies

Cited by in corpus (21)

• Accurate halo-model matter power spectra with dark energy, massive neutrinos and modified gravitational forces
• Modified Gravity N-body Code Comparison Project
• On the impact of $f(Q)$ gravity on the Large Scale Structure
• Constraining $f(R)$ gravity by the Large Scale Structure
• Weak Lensing Light-Cones in Modified Gravity simulations with and without Massive Neutrinos
• Realistic simulations of galaxy formation in f(R) modified gravity
• Joint halo mass function for modified gravity and massive neutrinos I: simulations and cosmological forecasts
• Exploring the liminality: properties of haloes and subhaloes in borderline $f(R)$ gravity
• On the dissection of degenerate cosmologies with machine learning
• Speeding up N-body simulations of modified gravity: Vainshtein screening models
• The modified gravity lightcone simulation project I: Statistics of matter and halo distributions
• Galaxy formation in the brane world I: overview and first results
• Simulating galaxy formation in f(R) modified gravity: Matter, halo, and galaxy-statistics
• K-mouflage effects on clusters of galaxies
• Zoomed cosmological simulations of Milky Way sized halos in f(R)-gravity
• $f(R)$ gravity modifications: from the action to the data
• Galaxy Clustering in 3D and Modified Gravity Theories
• High-redshift test of gravity using enhanced growth of small structures probed by the neutral hydrogen distribution
• Reconstruction of f(R) gravity models from observations
• Intensity mapping of post-reionization 21-cm signal and its cross-correlations as a probe of $f(R)$ gravity
• Lyman-alpha power spectrum as a probe of modified gravity