An improved model-independent assessment of the late-time cosmic expansion

Abstract

In the current work, we have implemented an extension of the standard Gaussian Process formalism, namely the Multi-Task Gaussian Process with the ability to perform a joint learning of several cosmological data simultaneously. We have utilised the "low-redshift" expansion rate data from Supernovae Type-Ia (SN), Baryon Acoustic Oscillations (BAO) and Cosmic Chronometers (CC) data in a joint analysis. We have tested several possible models of covariance functions and find very consistent estimates for cosmologically relevant parameters. In the current formalism, we also find provisions for heuristic arguments which allow us to select the best-suited kernel for the reconstruction of expansion rate data. We also utilised our method to account for systematics in CC data and find an estimate of $H_0=68.52_{-0.94}^{+0.94+2.51(sys)}$ ${\text{km/s Mpc}}^{-1}$ and a corresponding $r_d=145.61_{-2.82-4.3(sys)}^{+2.82}$ Mpc as our primary result. Subsequently, we find constraints on the present deceleration parameter $q_0=-0.52\pm 0.06$ and the transition redshift $z_T=0.64_{-0.09}^{+0.12}$. All the estimated cosmological parameters are found to be in good agreement with the standard $\Lambda$CDM scenario. Including the local model-independent $H_0$ estimate to the analysis we find $H_0=71.40_{-0.30}^{+0.30+1.65(sys)}$ ${\text{km/s Mpc}}^{-1}$ and the corresponding $r_d=141.29_{-1.31-2.63(sys)}^{+1.31}$ Mpc. Also, the constraints on $r_d{H}_0$ remain consistent throughout our analysis and also with the model-dependent CMB estimate. Using the $\mathcal{O}m(z)$ diagnostic, we find that the concordance model is very consistent within the redshift range $z\lesssim 2$ and mildly discrepant for $z\gtrsim 2$.

arXiv comment37 pages, 8 figures. Agrees with the published version. The asymmetric errors bars are now reported accordingly and a few references and additional comments are included

References in corpus (93)

• Planck 2015 results. XIII. Cosmological parameters
• Detection of the Baryon Acoustic Peak in the Large-Scale Correlation Function of SDSS Luminous Red Galaxies
• The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: cosmological analysis of the DR12 galaxy sample
• Exploring the Expansion History of the Universe
• Accelerating Universes with Scaling Dark Matter
• Constraints on the redshift dependence of the dark energy potential
• Theoretical Models of Learning to Learn
• The DESI Experiment Part I: Science,Targeting, and Survey Design
• A 6% measurement of the Hubble parameter at $z\sim 0.45$: direct evidence of the epoch of cosmic re-acceleration
• Raising the bar: new constraints on the Hubble parameter with cosmic chronometers at z$\sim$2
• Improved constraints on the expansion rate of the Universe up to z~1.1 from the spectroscopic evolution of cosmic chronometers
• Constraining Cosmological Parameters Based on Relative Galaxy Ages
• Two new diagnostics of dark energy
• Age-dating Luminous Red Galaxies observed with the Southern African Large Telescope
• New Parallaxes of Galactic Cepheids from Spatially Scanning the Hubble Space Telescope: Implications for the Hubble Constant
• Dynamical dark energy in light of the latest observations
• Reconstruction of dark energy and expansion dynamics using Gaussian processes
• Measurement of BAO correlations at $z=2.3$ with SDSS DR12 \lya-Forests
• Planck intermediate results. XLVI. Reduction of large-scale systematic effects in HFI polarization maps and estimation of the reionization optical depth
• Hubble parameter measurement constraints on the redshift of the deceleration-acceleration transition, dynamical dark energy, and space curvature
• 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
• New constraints on cosmological parameters and neutrino properties using the expansion rate of the Universe to z~1.75
• Gaussian Process Cosmography
• Model independent evidence for dark energy evolution from Baryon Acoustic Oscillations
• Baryon acoustic oscillations from the complete SDSS-III Ly$\alpha$-quasar cross-correlation function at $z=2.4$
• Type Ia Supernova Distances at z > 1.5 from the Hubble Space Telescope Multi-Cycle Treasury Programs: The Early Expansion Rate
• $H_0$ from cosmic chronometers and Type Ia supernovae, with Gaussian Processes and the novel Weighted Polynomial Regression method
• The DESI Experiment Part II: Instrument Design
• Cosmographic analysis of the equation of state of the universe through Padé approximations
• MOSFiT: Modular Open-Source Fitter for Transients
• Nonparametric Dark Energy Reconstruction from Supernova Data
• The clustering of the SDSS-IV extended Baryon Oscillation Spectroscopic Survey DR14 quasar sample: a tomographic measurement of cosmic structure growth and expansion rate based on optimal redshift weights
• Smoothing Supernova Data to Reconstruct the Expansion History of the Universe and its Age
• KiDS-450: Testing extensions to the standard cosmological model
• Is cosmic acceleration slowing down?
• Measuring the Hubble constant with Type Ia supernovae as near-infrared standard candles
• A litmus test for Lambda
• Marginal evidence for cosmic acceleration from Type Ia supernovae
• Median statistics and the Hubble constant
• Cosmographic analysis with Chebyshev polynomials
• Simultaneous Falsification of LCDM and Quintessence with Massive, Distant Clusters
• Using H(z) data as a probe of the concordance model
• Cosmographic Hubble fits to the supernova data
• Evidence for a Lower Value for $H_0$ from Cosmic Chronometers Data?
• Nonparametric Reconstruction of the Dark Energy Equation of State from Diverse Data Sets
• Measuring dark energy with the $E_{\mathrm{iso}}-E_{\mathrm{p}}$ correlation of gamma-ray bursts using model-independent methods
• Cosmic Chronometers: Constraining the Equation of State of Dark Energy. II. A Spectroscopic Catalog of Red Galaxies in Galaxy Clusters
• $Om$ diagnostic applied to scalar field models and slowing down of cosmic acceleration
• An Improved Method to Measure the Cosmic Curvature
• Is the expansion of the universe accelerating? All signs point to yes
• Apparent cosmic acceleration from type Ia supernovae
• Cosmological discordances II: Hubble constant, Planck and large-scale-structure data sets
• Is cosmic acceleration proven by local cosmological probes?
• Strong evidence for an accelerating universe
• Falsifying Paradigms for Cosmic Acceleration
• Cosmic slowing down of acceleration for several dark energy parametrizations
• Generalized Chen-Wu type cosmological model
• The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: tomographic BAO analysis of DR12 combined sample in Fourier space
• We do not live in the R_h = c t universe
• BAHAMAS: new SNIa analysis reveals inconsistencies with standard cosmology
• Test of the cosmic evolution using Gaussian processes
• Falsifying $\Lambda$CDM: Model-independent tests of the concordance model with eBOSS DR14Q and Pantheon
• Robust model comparison disfavors power law cosmology
• Testing dark energy paradigms with weak gravitational lensing
• The Linear Growth of Structure in the R_h=ct Universe
• Improved constraints on the dark energy equation of state using Gaussian processes
• Standardizing Type Ia Supernova Absolute Magnitudes Using Gaussian Process Data Regression
• Model Selection Using Cosmic Chronometers with Gaussian Processes
• Crossing Statistic: Reconstructing the Expansion History of the Universe
• Model independent constraints on the cosmological expansion rate
• Bayesian Evidences for Dark Energy models in light of current obsevational data
• Model-independent cosmological constraints from growth and expansion
• On Recent Claims Concerning the R_h=ct Universe
• Model-independent cosmic acceleration and type Ia supernovae intrinsic luminosity redshift dependence
• Cosmological Tests for a Linear Coasting Cosmology
• Exploring scalar field dynamics with Gaussian processes
• Power law cosmology model comparison with CMB scale information
• Power-law cosmology, SN Ia, and BAO
• Reconstruction of the HII Galaxy Hubble Diagram using Gaussian Processes
• A comprehensive investigation on the slowing down of cosmic acceleration
• Isotropic vs. Anisotropic components of BAO data: a tool for model selection
• Testing cosmic acceleration for $w(z)$ parameterizations using $f_{gas}$ measurements in galaxy clusters
• Optimising Gaussian processes for reconstructing dark energy dynamics from supernovae
• An accurate determination of the Hubble constant from Baryon Acoustic Oscillation datasets
• An analytic model for the transition from decelerated to accelerated cosmic expansion
• Cosmological constraints from low-redshift data
• Model-Independent Predictions for Smooth Cosmic Acceleration Scenarios
• Local probes strongly favor $\Lambda$CDM against power-law and $R_h=ct$ universe
• Observational Limits on Patchy Reionization: Implications for B-modes
• Constraints On Dark Energy Models From Galaxy Clusters and Gravitational Lensing Data
• Physical condition for the slowing down of cosmic acceleration
• In Defense of an Accelerating Universe: Model Insensitivity of the Hubble Diagram
• Probing the Expansion history of the Universe by Model-Independent Reconstruction from Supernovae and Gamma-Ray Bursts Measurements

Cited by in corpus (90)

• In the Realm of the Hubble tension $-$ a Review of Solutions
• Challenges for $\Lambda$CDM: An update
• Cosmology Intertwined II: The Hubble Constant Tension
• The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
• Setting the Stage for Cosmic Chronometers. II. Impact of Stellar Population Synthesis Models Systematics and Full Covariance Matrix
• Eppur è piatto? The cosmic chronometer take on spatial curvature and cosmic concordance
• $H_0$ Tension, Phantom Dark Energy and Cosmological Parameter Degeneracies
• General Cosmography Model with Spatial Curvature
• Update on Coupled Dark Energy and the $H_0$ tension
• Using quasar X-ray and UV flux measurements to constrain cosmological model parameters
• Observational constraints on the tilted spatially-flat and the untilted nonflat $\varphi$CDM dynamical dark energy inflation models
• Cosmic chronometers to calibrate the ladders and measure the curvature of the Universe. A model-independent study
• Quasar X-ray and UV flux, baryon acoustic oscillation, and Hubble parameter measurement constraints on cosmological model parameters
• Constraints on cosmological parameters from gamma-ray burst peak photon energy and bolometric fluence measurements and other data
• Brans-Dicke cosmology with a $\Lambda$- term: a possible solution to $\Lambda$CDM tensions
• Measuring the Hubble constant and spatial curvature from supernova apparent magnitude, baryon acoustic oscillation, and Hubble parameter data
• The trouble beyond $H_0$ and the new cosmic triangles
• The local and distant Universe: stellar ages and $H_0$
• Measurements of $H_0$ and reconstruction of the dark energy properties from a model-independent joint analysis
• The evidence of cosmic acceleration and observational constraints
• Using SPTpol, Planck 2015, and non-CMB data to constrain tilted spatially-flat and untilted non-flat $\Lambda$CDM, XCDM, and $\varphi$CDM dark energy inflation cosmologies
• Model-agnostic assessment of dark energy after DESI DR1 BAO
• Cosmological constraints from HII starburst galaxy apparent magnitude and other cosmological measurements
• Parametric and nonparametric methods hint dark energy evolution
• Generalized Emergent Dark Energy: observational Hubble data constraints and stability analysis
• Observational constraints on the tilted flat-XCDM and the untilted nonflat XCDM dynamical dark energy inflation parameterizations
• CMB tensions with low-redshift $H_0$ and $S_8$ measurements: impact of a redshift-dependent type-Ia supernovae intrinsic luminosity
• Non-parametric reconstruction of the cosmological \textit{jerk} parameter
• Observational constraints on Myrzakulov gravity
• $\Lambda$CDM Tensions: Localising Missing Physics through Consistency Checks
• Inferring $S_8(z)$ and $\gamma (z)$ with cosmic growth rate measurements using machine learning
• Accelerating Universe in Hybrid and Logarithmic Teleparallel Gravity
• Observational constraints of a new unified dark fluid and the $H_0$ tension
• Toward a Better Understanding of Cosmic Chronometers: Stellar Population Properties of Passive Galaxies at Intermediate Redshift
• Quantifying the evidence for the current speed-up of the Universe with low and intermediate-redshift data. A more model-independent approach
• Reconstruction of the Dark Energy equation of state from latest data: the impact of theoretical priors
• Towards a model-independent reconstruction approach for late-time Hubble data
• Metastable dark energy models in light of Planck 2018: Alleviating the $H_0$ tension
• Model-independent cosmic acceleration and type Ia supernovae intrinsic luminosity redshift dependence
• Revisiting a non-parametric reconstruction of the deceleration parameter from combined background and the growth rate data
• Constraining the Asymptotically Safe Cosmology: cosmic acceleration without dark energy
• Model Comparison of $\Lambda$CDM vs $R_h=ct$ using Cosmic Chronometers
• CMB distance priors revisited: effects of dark energy dynamics, spatial curvature, primordial power spectrum, and neutrino parameters
• Reconstruction of the dark sectors' interaction: A model-independent inference and forecast from GW standard sirens
• Measuring the sound horizon and absolute magnitude of SNIa by maximizing the consistency between low-redshift data sets
• Influence of the Bounds of the Hyperparameters on the Reconstruction of Hubble Constant with Gaussian Process
• Sources of $H_0$-tensions in dark energy scenarios
• Model independent bounds on Type Ia supernova absolute peak magnitude
• Evidence for cosmic acceleration with next-generation surveys: A model-independent approach
• Measurement on the cosmic curvature using the Gaussian process method
• Constraining the dark energy statefinder hierarchy in a kinematic approach
• Dark energy and dark matter unification from dynamical space time: observational constraints and cosmological implications
• Constraints on field flows of quintessence dark energy
• Multi-tasking the growth of cosmological structures
• Stability analysis and constraints on interacting viscous cosmology
• On the use of galaxies as clocks and the universal expansion
• Exploring new physics in the late Universe's expansion through non-parametric inference
• Model-independent cosmological inference after the DESI DR2 data with improved inverse distance ladder
• A Complete Cosmological Scenario in Teleparallel Gravity
• Holographic and Gravity-Thermodynamic Approaches in Entropic Cosmology: Bayesian Assessment using late-time Data
• Dark energy reconstructions combining BAO data with galaxy clusters and intermediate redshift catalogs
• A null test of the Cosmological Principle with BAO measurements
• Reconstruction of late-time cosmology using Principal Component Analysis
• Non-parametric reconstruction of cosmological observables using Gaussian Processes Regression
• From Hubble to Snap Parameters: A Gaussian Process Reconstruction
• Null tests of the concordance model in the era of Euclid and the SKA
• Analytical Gaussian Process Cosmography: Unveiling Insights into Matter-Energy Density Parameter at Present
• Quantum origin of dark energy and the Hubble tension
• Comparing teh holographic principle inspired dark energy models
• Revisiting cosmic acceleration with DESI BAO
• A possible late-time transition of $M_B$ inferred via neural networks
• Null tests with Gaussian Process
• Breaking the baryon-dark matter degeneracy in a model-independent way through the Sunyaev-Zeldovich effect
• Reference level of the vacuum energy density of the Universe and astrophysical data
• Measuring Cosmological Distances Using Cluster Edges as a Standard Ruler
• A model-independent test of the evolution of gas depletion factor for SPT-SZ and Planck ESZ clusters
• Potentialities of Hubble parameter and expansion rate function data to alleviate Hubble tension
• Unveiling the Universe with Emerging Cosmological Probes
• Revisiting model-independent constraints on spatial curvature and cosmic ladders calibration: updated and forecast analyses
• Parameter-free prediction of the asymptotic acceleration scale confirmed by weak lensing
• Generalised scalar-tensor theories of gravity and pressure profiles of galaxy clusters
• Dark matter deficient galaxies in the Illustris flat-$\Lambda$CDM model structure formation simulation
• Constraints on Generalized Gravity-Thermodynamic Cosmology from DESI DR2
• The equation of vacuum state and the structure formation in universe
• Model-Agnostic Cosmological Inference with SDSS-IV eBOSS: Simultaneous Probing for Background and Perturbed Universe
• Unified Dark Energy and Dark Matter from Dynamical Spacetime Cosmology
• Constraints on Multicomponent Dark Energy from Cosmological Observations
• Cosmic acceleration and the Hubble tension from baryon acoustic oscillation data
• Low-redshift tests of Newtonian cosmologies with a time-varying gravitational constant
• Kinematical models of latetime cosmology and the statefinder diagnostic