Chameleon Screening in Cosmic Voids

Abstract

A key goal in cosmology in the upcoming decade will be to form a better understanding of the accelerated expansion of the Universe. Upcoming surveys, such as the Vera C. Rubin Observatory's 10-year Legacy Survey of Space and Time (LSST), Euclid and the Square Killometer Array (SKA) will deliver key datasets required to tackle this and other puzzles in contemporary cosmology. With this data, constraints of unprecedented power will be put on different models of dark energy and modified gravity. In this context it is crucial to understand how screening mechanisms, which hide the deviations of these theories from the predictions of general relativity in local experiments, affect structure formation. In this work we approach this problem by using a combination of analytic and numerical methods to describe chameleon screening in the context of cosmic voids. We apply a finite element method (FEM) code, SELCIE, to solve the chameleon equation of motion for a number of void profiles derived from observational data and simulations. The obtained results indicate a complex relationship between the properties of cosmic voids and the size of the chameleon acceleration of a test particle. We find that the fifth force on a test particle in a void is primarily related to the depth and the inner density gradient of the void. For realistic void profiles, the obtained chameleon-to-Newtonian acceleration ratios range between $a_{\varphi }/a_{\mathrm{Newt}}\approx 10^{-6}-10^{-5}$. However, it should be noted that in unusually deep voids with large inner density gradients, the acceleration ratios can be significantly higher. Similarly, other chameleon models, such as $f(R)$ Hu-Sawicki theory allow for significantly higher acceleration ratios. Given these results, we also discuss the optimal density profiles for detecting the fifth force in the upcoming observational surveys.

arXiv comment19 pages, 9 figures. The SELCIE code is available at: https://github.com/C-Briddon/SELCIE. Submitted to JCAP

References in corpus (46)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• The Cosmological Constant and Dark Energy
• Modified Gravity and Cosmology
• The Case for a Positive Cosmological Lambda-term
• In the Realm of the Hubble tension $-$ a Review of Solutions
• Models of f(R) Cosmic Acceleration that Evade Solar-System Tests
• Chameleon Cosmology
• Dark Energy vs. Modified Gravity
• An introduction to the Vainshtein mechanism
• ZOBOV: a parameter-free void-finding algorithm
• Tests of Chameleon Gravity
• Symmetron Cosmology
• Voids in the PSCz Survey and the Updated Zwicky Catalog
• Universal Density Profile for Cosmic Voids
• Testing Gravity using Cosmic Voids
• Voids in Modified Gravity: Excursion Set Predictions
• Experiment to detect dark energy forces using atom interferometry
• Early modified gravity in light of the $H_0$ tension and LSS data
• Piercing the Vainshtein screen with anomalous gravitational wave speed: Constraints on modified gravity from binary pulsars
• Cosmic Voids: structure, dynamics and galaxies
• Vainshtein Screening in Scalar-Tensor Theories before and after GW170817: Constraints on Theories beyond Horndeski
• Testing chameleon gravity with the Coma cluster
• The XMM Cluster Survey: Testing chameleon gravity using the profiles of clusters
• The Size and Shape of Local Voids
• A robust public catalogue of voids and superclusters in the SDSS Data Release 7 galaxy surveys
• On the universality of void density profiles
• Cosmic voids in modified gravity scenarios
• Constraining symmetron fields with atom interferometry
• Self-similarity and universality of void density profiles in simulation and SDSS data
• Dark energy interactions near the galactic centre
• The Jubilee ISW Project I: simulated ISW and weak lensing maps and initial power spectra results
• Cosmological test of gravity using weak lensing voids
• Domain walls coupled to matter: the symmetron example
• Void profile from Planck lensing potential map
• Probing modified gravity via the mass-temperature relation of galaxy clusters
• Testing $f(R)$ Gravity With Scale Dependent Cosmic Void Velocity Profiles
• SELCIE: A tool for investigating the chameleon field of arbitrary sources
• Density and velocity profiles around cosmic voids
• Metal Abundances and Star-Formation Rates of Emission-Line Galaxies in and around the Bootes Void
• Fifth-Force Screening around Extremely Compact Sources
• Detecting Domain Walls in Laboratory Experiments
• Equivalence between Scalar-Tensor theories and $f(R)$-gravity: From the action to Cosmological Perturbations
• Screening maps of the local Universe I -- Methodology
• $\phi$enics: Vainshtein screening with the finite element method
• Universal void density profiles from simulation and SDSS
• Lognormal Distribution of Cosmic Voids in Simulations and Mocks

Cited by in corpus (5)

• Why Cosmic Voids Matter: Nonlinear Structure & Linear Dynamics
• Imprints of screened dark energy on nonlocal quantum correlations
• Equivalence of scalar-tensor theories and scale-dependent gravity
• Phenomenological footprints of Lambda varying gravity theories inspired from quantum gravity models in the multi-messenger era
• Bending the web: exploring the impact of modified gravity on the density field and halo properties within the cosmic web