The cosmology of $f(R,L_m)$ gravity: constraining the background and perturbed dynamics

Abstract

This paper delves into the late-time accelerated expansion of the universe and the evolution of cosmic structures within the context of a specific \( f(R, L_m) \) gravity model, formulated as \( f(R, L_m) = λR + βL_m^α+ η\). To study the cosmological viability of the model, we employed the latest cosmic measurement datasets: i) 57 observational Hubble parameter data points (\texttt{OHD}); ii) 1048 distance moduli data points (\texttt{SNIa}); iii) a combined dataset (\texttt{OHD+SNIa}); and large scale structure datasets, including iv) 14 growth rate data points (\texttt{f}); and v) 30 redshift space distortion data points (\texttt{f}${\sigma }_8$). These datasets facilitated the constraint of the \( f(R, L_m) \)-gravity model via MCMC simulations, followed by a comparative analysis with the \(Λ\)CDM model. A comprehensive statistical analysis has been conducted to evaluate the \( f(R, L_m) \)-gravity model's efficacy in explaining both the accelerated expansion of the universe and the growth of cosmic structures.

arXiv comment12 pages, 11 figures, 5 tables

References in corpus (49)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• emcee: The MCMC Hammer
• Unified cosmic history in modified gravity: from F(R) theory to Lorentz non-invariant models
• f(R,T) gravity
• The Complete Light-curve Sample of Spectroscopically Confirmed Type Ia Supernovae from Pan-STARRS1 and Cosmological Constraints from The Combined Pantheon Sample
• Discovery of a Supernova Explosion at Half the Age of the Universe and its Cosmological Implications
• Cosmological Constraints from the SDSS Luminous Red Galaxies
• Dark torsion as the cosmic speed-up
• Einstein's Other Gravity and the Acceleration of the Universe
• Coincident General Relativity
• Cluster Abundance Constraints on Quintessence Models
• The WiggleZ Dark Energy Survey: Joint measurements of the expansion and growth history at z < 1
• A test of the nature of cosmic acceleration using galaxy redshift distortions
• The WiggleZ Dark Energy Survey: the growth rate of cosmic structure since redshift z=0.9
• Dark Energy Dominance and Cosmic Acceleration in First Order Formalism
• Reconstructing the history of structure formation using redshift distortions
• Interpreting large-scale redshift-space distortion measurements
• Gravity assisted dark energy dominance and cosmic acceleration
• Cosmic Structure Growth and Dark Energy
• Hubble Parameter and Baryon Acoustic Oscillation Measurement Constraints on the Hubble Constant, the Deviation from the Spatially-Flat $\Lambda$cdm Model, The Deceleration-Acceleration Transition Redshift, and Spatial Curvature
• Modified gravity with arbitrary coupling between matter and geometry
• Generalized curvature-matter couplings in modified gravity
• The Clustering of the SDSS Main Galaxy Sample II: Mock galaxy catalogues and a measurement of the growth of structure from Redshift Space Distortions at $z=0.15$
• Cosmic flows in the nearby universe from Type Ia Supernovae
• The Subaru FMOS galaxy redshift survey (FastSound). IV. New constraint on gravity theory from redshift space distortions at $z\sim 1.4$
• Galaxy And Mass Assembly (GAMA): improved cosmic growth measurements using multiple tracers of large-scale structure
• The 2dF-SDSS LRG and QSO Survey: QSO clustering and the L-z degeneracy
• The 2dF-SDSS LRG and QSO Survey: The LRG 2-Point Correlation Function and Redshift-Space Distortions
• The VIMOS Public Extragalactic Redshift Survey (VIPERS): The growth of structures at $0.5<z<1.2$ from redshift-space distortions in the clustering of the PDR-2 final sample
• Production of $\Sigma (1385{)}^{\pm }$ and $\Xi (1530{)}^0$ in proton-proton collisions at $\sqrt{s}=$ 7 TeV
• Local Gravity versus Local Velocity: Solutions for $\beta$ and nonlinear bias
• The growth rate of cosmic structure from peculiar velocities at low and high redshifts
• Testing $\Lambda$CDM at the lowest redshifts with SN Ia and galaxy velocities
• Determining the Hubble constant from Hubble parameter measurements
• Cosmology in $f(R,L_m)$ gravity
• Covariant gauge-invariant perturbations in multifluid f(R) gravity
• The VIMOS Public Extragalactic Redshift Survey (VIPERS). Gravity test from the combination of redshift-space distortions and galaxy-galaxy lensing at $0.5<z<1.2$
• 2MTF VI. Measuring the velocity power spectrum
• The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: a tomographic analysis of structure growth and expansion rate from anisotropic galaxy clustering
• Inferring $S_8(z)$ and $\gamma (z)$ with cosmic growth rate measurements using machine learning
• The growth rate of cosmic structures in the local Universe with the ALFALFA survey
• Scalar perturbations in $f(T)$ gravity using the $1+3$ covariant approach
• Constrained evolution of effective equation of state parameter in non-linear $f(R,L_m)$ dark energy model: Insights from Bayesian analysis of cosmic chronometers and Pantheon samples
• Baryogenesis in $f(R,L_m)$ gravity
• Constraining viscous dark energy equation of state in $f(R,L_m)$ gravity
• The clustering of the SDSS-IV extended Baryon Oscillation Spectroscopic Survey DR14 quasar sample: Anisotropic Baryon Acoustic Oscillations measurements in Fourier-space with optimal redshift weights
• A study of perturbations in scalar-tensor theory using 1+3 covariant approach
• On multifluid perturbations in scalar-tensor cosmology
• Measuring the matter energy density and Hubble parameter from Large Scale Structure

Cited by in corpus (1)

• Is ${\omega }_0{\omega }_a$CDM a good model for the clumpy Universe?