Galaxy clustering in modified gravity from full-physics simulations. I: two-point correlation functions

Abstract

We present an in-depth investigation of galaxy clustering based on a new suite of realistic large-box galaxy-formation simulations in $f(R)$ gravity, with a subgrid physics model that has been recalibrated to reproduce various observed stellar and gas properties. We focus on the two-point correlation functions of the luminous red galaxies (LRGs) and emission line galaxies (ELGs), which are primary targets of ongoing and future galaxy surveys such as DESI. One surprising result is that, due to several nontrivial effects of modified gravity on matter clustering and the galaxy-halo connection, the clustering signal does not depend monotonically on the fifth-force strength. For LRGs this complicated behaviour poses a challenge to meaningfully constraining this model. For ELGs, in contrast, this can be straightforwardly explained by the time evolution of the fifth force, which means that weaker $f(R)$ models can display nearly the same -- up to $25\%$ -- deviations from $\Lambda$CDM as the strongest ones, albeit at lower redshifts. This implies that even very weak $f(R)$ models can be strongly constrained, unlike with most other observations. Our results show that galaxy formation acquires a significant environment dependence in $f(R)$ gravity which, if not properly accounted for, may lead to biased constraints on the model. This highlights the essential role of hydrodynamical simulations in future tests of gravity exploring precision galaxy-clustering data from the likes of DESI and Euclid.

arXiv comment18 pages, 8 figures + 2 figures in appendix

References in corpus (52)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• Observation of Gravitational Waves from a Binary Black Hole Merger
• Planck 2015 results. XIII. Cosmological parameters
• f(R) Theories Of Gravity
• f(R) theories
• 4D Gravity on a Brane in 5D Minkowski Space
• The Cosmological Constant
• E pur si muove: Galiliean-invariant cosmological hydrodynamical simulations on a moving mesh
• Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Final Maps and Results
• Simulating Galaxy Formation with the IllustrisTNG Model
• The galileon as a local modification of gravity
• Models of f(R) Cosmic Acceleration that Evade Solar-System Tests
• Chameleon Fields: Awaiting Surprises for Tests of Gravity in Space
• Chameleon Cosmology
• Dark Energy Survey Year 3 Results: Cosmological Constraints from Galaxy Clustering and Weak Lensing
• Covariant Galileon
• The Dark Side of the Halo Occupation Distribution
• The Halo Occupation Distribution: Towards an Empirical Determination of the Relation Between Galaxies and Mass
• The Connection between Galaxies and their Dark Matter Halos
• KiDS-1000 Cosmology: Multi-probe weak gravitational lensing and spectroscopic galaxy clustering constraints
• Linking halo mass to galaxy luminosity
• A primer on hierarchical galaxy formation: the semi-analytical approach
• Cosmology from cosmic shear power spectra with Subaru Hyper Suprime-Cam first-year data
• Connecting Galaxies, Halos, and Star Formation Rates Across Cosmic Time
• SNLS3: Constraints on Dark Energy Combining the Supernova Legacy Survey Three Year Data with Other Probes
• Generalization of the Proca Action
• f(R) Gravity and Chameleon Theories
• k-Mouflage gravity
• ECOSMOG: An Efficient Code for Simulating Modified Gravity
• Derivative self-interactions for a massive vector field
• Strongly Coupled Chameleon Fields: New Horizons in Scalar Field Theory
• Modeling Galaxy-Mass Correlations in Dissipationless Simulations
• Modified Gravity-GADGET: A new code for cosmological hydrodynamical simulations of modified gravity models
• The nonlinear matter and velocity power spectra in f(R) gravity
• Redshift space distortions in f(R) gravity
• Limitations to the "basic'' HOD model and beyond
• The Novel Probes Project -- Tests of Gravity on Astrophysical Scales
• The galaxy-halo connection of emission-line galaxies in IllustrisTNG
• Comparing galaxy formation in semi-analytic models and hydrodynamical simulations
• Testing the quasi-static approximation in $f(R)$ gravity simulations
• Realistic simulations of galaxy formation in f(R) modified gravity
• Illustrating galaxy-halo connection in the DESI era with IllustrisTNG
• Fast full N-body simulations of generic modified gravity: conformal coupling models
• A general framework to test gravity using galaxy clusters I: Modelling the dynamical mass of haloes in $f(R)$ gravity
• Fast full $N$-body simulations of generic modified gravity: derivative coupling models
• Towards a non-Gaussian model of redshift space distortions
• Zoomed cosmological simulations of Milky Way sized halos in f(R)-gravity
• $\text{fRevolution}$ $-$ Relativistic Cosmological Simulations in $f(R)$ Gravity I: Methodology
• Towards an accurate model of small-scale redshift-space distortions in modified gravity
• A general framework to test gravity using galaxy clusters VI: Realistic galaxy formation simulations to study clusters in modified gravity
• Challenges to the Lambda CDM Cosmology

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