Age-dating Luminous Red Galaxies observed with the Southern African Large Telescope

Abstract

We measure a value for the cosmic expansion of $H(z)=89\pm 23$(stat) $\pm$ 44(syst) km s${}^{-1}$ Mpc${}^{-1}$ at a redshift of $z\simeq 0.47$ based on the differential age technique. This technique, also known as cosmic chronometers, uses the age difference between two redshifts for a passively evolving population of galaxies to calculate the expansion rate of the Universe. Our measurement is based on analysis of high quality spectra of Luminous Red Galaxies (LRGs) obtained with the Southern African Large Telescope (SALT) in two narrow redshift ranges of $z\simeq 0.40$ and $z\simeq 0.55$ as part of an initial pilot study. Ages were estimated by fitting single stellar population models to the observed spectra. This measurement presents one of the best estimates of $H(z)$ via this method at $z\sim 0.5$ to date.

16 pages, 7 figures, 5 tables, fixed typos on H(z) values for figure 4, also for section 4

References in corpus (17)

• Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• The propagation of uncertainties in stellar population synthesis modeling I: The relevance of uncertain aspects of stellar evolution and the IMF to the derived physical properties of galaxies
• The hierarchical formation of the brightest cluster galaxies
• Raising the bar: new constraints on the Hubble parameter with cosmic chronometers at z$\sim$2
• Evolutionary Stellar Population Synthesis with MILES. Part I: The Base Models and a New Line Index System
• Evolutionary stellar population synthesis with MILES - II. Scaled-solar and α-enhanced models
• Population Synthesis in the Blue IV: Accurate Model Predictions for Lick Indices and UBV Colors in Single Stellar Populations
• Recovering galaxy star formation and metallicity histories from spectra using VESPA
• GALEV evolutionary synthesis models - I. Code, input physics and web-interface
• The 2dF-SDSS LRG and QSO (2SLAQ) Luminous Red Galaxy Survey
• Spectral models for solar-scaled and alpha-enhanced stellar populations
• An Optical Catalog of Galaxy Clusters Obtained from an Adaptive Matched Filter Finder Applied to SDSS DR6
• MegaZ-LRG: A photometric redshift catalogue of one million SDSS Luminous Red Galaxies
• Age constraints on the cosmic equation of state
• The 2dF-SDSS LRG and QSO Survey: The Star Formation Histories of Luminous Red Galaxies
• Properties of Luminous Red Galaxies in the Sloan Digital Sky Survey

Cited by in corpus (321)

• 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
• 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
• $H_0$ from cosmic chronometers and Type Ia supernovae, with Gaussian Processes and the novel Weighted Polynomial Regression method
• Toward a Better Understanding of Cosmic Chronometers: A new measurement of H(z) at z~0.7
• Eppur è piatto? The cosmic chronometer take on spatial curvature and cosmic concordance
• Hubble Sinks In The Low-Redshift Swampland
• Arbitrating the $S_8$ discrepancy with growth rate measurements from Redshift-Space Distortions
• General Cosmography Model with Spatial Curvature
• Update on Coupled Dark Energy and the $H_0$ tension
• Primordial gravitational waves from NANOGrav: a broken power-law approach
• Is there an early Universe solution to Hubble tension?
• The Cardassian expansion revisited: constraints from updated Hubble parameter measurements and Type Ia Supernovae data
• Unifying Holographic Inflation with Holographic Dark Energy: a Covariant Approach
• Non-parametric spatial curvature inference using late-universe cosmological probes
• Cosmic acceleration with bulk viscosity in modified $f(Q)$ gravity
• An improved model-independent assessment of the late-time cosmic expansion
• The galaxy power spectrum take on spatial curvature and cosmic concordance
• $f(Q,T)$ gravity models with observational constraints
• New Observational $H(z)$ Data from Full-Spectrum Fitting of Cosmic Chronometers in the LEGA-C Survey
• Constraints on a Bianchi type I spacetime extension of the standard $\Lambda$CDM model
• Using non-DESI data to confirm and strengthen the DESI 2024 spatially-flat $w_0{w}_a$CDM cosmological parameterization result
• Using the tilted flat-$\Lambda$CDM and the untilted non-flat $\Lambda$CDM inflation models to measure cosmological parameters from a compilation of observational data
• Analyzing the $H_0$ tension in $F(R)$ gravity models
• Constraints on dark energy dynamics and spatial curvature from Hubble parameter and baryon acoustic oscillation data
• Cosmology in $f(R,L_m)$ gravity
• Density perturbations for running vacuum: a successful approach to structure formation and to the ${\sigma }_8$-tension
• Dark energy models from a parametrization of $H$: A comprehensive analysis and observational constraints
• Reconstructing Functions and Estimating Parameters with Artificial Neural Networks: A Test with the Hubble Parameter and SNe Ia
• Cosmic chronometers to calibrate the ladders and measure the curvature of the Universe. A model-independent study
• Testing Late Time Cosmic Acceleration with uncorrelated Baryon Acoustic Oscillations dataset
• Evidence of a decreasing trend for the Hubble constant
• Recombination-independent determination of the sound horizon and the Hubble constant from BAO
• Brans-Dicke cosmology with a $\Lambda$- term: a possible solution to $\Lambda$CDM tensions
• Paramerization of deceleration parameter in $f(Q)$ gravity
• Cosmological constraints on parametrized interacting dark energy
• A new parametrization of Hubble parameter in $f(Q)$ gravity
• Running vacuum in the Universe: phenomenological status in light of the latest observations, and its impact on the ${\sigma }_8$ and $H_0$ tensions
• No-go guide for the Hubble tension : Late-time solutions
• The evidence of cosmic acceleration and observational constraints
• How predictions of cosmological models depend on Hubble parameter data sets
• Model-independent Curvature Determination from Gravitational-Wave Standard Sirens and Cosmic Chronometers
• Parametric and nonparametric methods hint dark energy evolution
• $H_0=69.8\pm 1.3$ $\mathrm{km}{\mathrm{s}}^{-1}\mathrm{Mp}{\mathrm{c}}^{-1}$, ${\Omega }_{m0}=0.288\pm 0.017$, and other constraints from lower-redshift, non-CMB, expansion-rate data
• Exhaustive Symbolic Regression
• The resilience of the Etherington-Hubble relation
• From a Bounce to the Dark Energy Era with $F(R)$ Gravity
• Non-parametric reconstruction of the cosmological \textit{jerk} parameter
• Testing the effect of $H_0$ on $f{\sigma }_8$ tension using a Gaussian Process method
• Testing the equation of state for viscous dark energy
• Neural Network Reconstruction of Late-Time Cosmology and Null Tests
• Testing the consistency between cosmological data: the impact of spatial curvature and the dark energy EoS
• Screened fifth forces lower the TRGB-calibrated Hubble constant too
• Phantom matter: a challenging solution to the cosmological tensions
• Phantom cosmological model with observational constraints in $f(Q)$ gravity
• Accelerating Universe in Hybrid and Logarithmic Teleparallel Gravity
• Model-independent measurement of cosmic curvature with the latest $H(z)$ and SNe Ia data: A comprehensive investigation
• Modelling and testing the equation of state for (Early) dark energy
• Assessment of the cosmic distance duality relation using Gaussian Process
• Revealing the late-time transition of $H_0$: relieve the Hubble crisis
• Current Constraints on Anisotropic and Isotropic Dark Energy Models
• Investigating the dark energy phenomenon in $f(R,L_m)$ cosmological models with observational constraints
• Null test for interactions in the dark sector
• Quantifying the evidence for the current speed-up of the Universe with low and intermediate-redshift data. A more model-independent approach
• Cosmological constraints from a joint analysis of cosmic growth and expansion
• Composite Dark Energy and the Cosmological Tensions
• A New Method to Measure Hubble Parameter $H(z)$ using Fast Radio Bursts
• Towards a model-independent reconstruction approach for late-time Hubble data
• Observational Constraints and Cosmological Implications of Scalar-Tensor $f(R,T)$ Gravity
• Early Dark Energy with Power-law F(R) Gravity
• Late time acceleration due to generic modification of gravity and Hubble tension
• Calibrating Gamma-Ray Bursts by Using a Gaussian Process with Type Ia Supernovae
• Thermodynamical aspects of Bianchi type-I Universe in quadratic form of $f\left(Q\right)$ gravity and observational constraints
• Power-law cosmology in Weyl-type $f(Q,T)$ gravity
• An Axially Symmetric Transitioning models with Observational Constraints
• Testing Dark Energy Models with Gamma-Ray Bursts Calibrated from the Observational $H(z)$ Data through a Gaussian Process
• Transitioning Universe with hybrid scalar field in Bianchi I space-time
• Gamma ray burst constraints on cosmological models from the improved Amati correlation
• Model Comparison of $\Lambda$CDM vs $R_h=ct$ using Cosmic Chronometers
• Revisiting a non-parametric reconstruction of the deceleration parameter from combined background and the growth rate data
• Cosmological-model-independent determination of Hubble constant from fast radio bursts and Hubble parameter measurements
• Cosmological tests of the osculating Barthel-Kropina dark energy model
• Testing logarithmic corrections on $R^2$-exponential gravity by observational data
• Machine learning constraints on deviations from general relativity from the large scale structure of the Universe
• Null tests of the standard model using the linear model formalism
• Cosmology Intertwined: A Review of the Particle Physics, Astrophysics, and Cosmology Associated with the Cosmological Tensions and Anomalies
• Constraining Anisotropic Cosmological Model in $f(\mathcal{R},{\mathcal{L}}_m)$ Gravity
• Impact of young stellar components on quiescent galaxies: deconstructing cosmic chronometers
• Constraining the curvature density parameter in cosmology
• A New $Om(z)$ Diagnostic of Dark Energy in General Relativity Theory
• Can $f(T)$ models play a bridge between early and late time Universe?
• Late-time cosmology in $f(Q,L_m)$ gravity: Analytical solutions and observational fits
• No-go guide for late-time solutions to the Hubble tension: Matter perturbations
• Bulk viscous matter and the cosmic acceleration of the universe in $f(Q,T)$ gravity
• Analyzing the geometrical and dynamical parameters of modified Teleparallel-Gauss-Bonnet model
• Measuring the sound horizon and absolute magnitude of SNIa by maximizing the consistency between low-redshift data sets
• Constraining $f(Q,L_m)$ gravity with bulk viscosity
• 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
• Constraining An Exact Brans-Dicke gravity theory with Recent Observations
• Cosmological model-independent test of $\Lambda$CDM with two-point diagnostic by the observational Hubble parameter data
• Modeling Transit Dark Energy in $f(R,L_m)$-gravity
• Cosmographic view on the $H_0$ and ${\sigma }_8$ tensions
• Observational constraints and predictions of the interacting dark sector with field-fluid mapping
• Observational constraints and some toy models in $f(Q)$ gravity with bulk viscous fluid
• Neural network reconstructions for the Hubble parameter, growth rate and distance modulus
• Cosmological constraints from HII starburst galaxy, quasar angular size, and other measurements
• Influence of the Bounds of the Hyperparameters on the Reconstruction of Hubble Constant with Gaussian Process
• Bianchi Type I model of universe with customized scale factors
• A model-independent reconstruction of dark sector interactions
• Non-parametric reconstruction of interaction in the cosmic dark sector
• $H_0$ Tension in Torsion-based Modified Gravity
• Observational constrained $F(R,\mathcal{G})$ gravity cosmological model and the dynamical system analysis
• The Reconstruction of Constant Jerk Parameter with $f(R,T)$ Gravity
• Exploring the Hubble tension with a late time Modified Gravity scenario
• Anisotropic Universe in $f(Q,T)$ gravity, a novel study
• Weyl type $f(Q,T)$ gravity observational constrained cosmological model
• Likelihood-free Cosmological Constraints with Artificial Neural Networks: An Application on Hubble Parameters and SNe Ia
• Measurement on the cosmic curvature using the Gaussian process method
• Neural Network Reconstruction of $H^{\prime }(z)$ and its application in Teleparallel Gravity
• Cosmological parameter estimation with Genetic Algorithms
• Constraining the dark energy statefinder hierarchy in a kinematic approach
• Isotropic vs. Anisotropic components of BAO data: a tool for model selection
• Reaffirming the Cosmic Acceleration without Supernova and CMB
• Observational Constraints on Dynamical Dark Energy Models
• Brans-Dicke cosmology mimicking running vacuum
• Kernel Selection for Gaussian Process in Cosmology: with Approximate Bayesian Computation Rejection and Nested Sampling
• Holographic dark energy: constraints on the interaction from diverse observational data sets
• Stringy Running Vacuum Model and current Tensions in Cosmology
• Constraining extended teleparallel gravity via cosmography: A model-independent approach
• Investigating the accelerated expansion of the Universe through updated constraints on viable $f(R)$ models within the metric formalism
• Multiple measurements of quasars acting as standard probes: model independent calibration and exploring the Dark Energy Equation of States
• Transit String Dark Energy Models in $f(Q)$ Gravity
• Gaussian Process Approach for Model-Independent Reconstruction of $f(Q)$ Gravity with Direct Hubble Measurements
• Reconstruction of an Observationally Constrained $f(R,T)$ gravity model
• Constraints on field flows of quintessence dark energy
• Testing f(R) gravity with the simulated data of gravitational waves from the Einstein Telescope
• No-go guide for the Hubble tension: late-time or local-scale new physics
• Constraining Bianchi type V universe with recent H(z) and BAO observations in Brans-Dicke theory of gravitation
• Does the second law hold at cosmic scales?
• Hubble constant and sound horizon from the late-time Universe
• On the use of galaxies as clocks and the universal expansion
• New parametrization of the dark-energy equation of state with a single parameter
• Running vacuum in Brans-Dicke theory: a possible cure for the ${\sigma }_8$ and $H_0$ tensions
• Coupled Multi Scalar Field Dark Energy
• Exploring Universe acceleration through observational constraints via Hubble parameter reconstruction
• Observational constraints on a generalized equation of state model
• Corrected holographic dark energy with power-law entropy and Hubble Horizon cut-off in FRW Universe
• Null test for cosmic curvature using Gaussian process
• Running vacuum versus Holographic dark energy: a cosmographic comparison
• Measuring the Hubble Constant with cosmic chronometers: a machine learning approach
• Spatial Curvature in $f(R)$ Gravity
• Measuring Hubble constant in an anisotropic extension of $\Lambda$CDM model
• Effective equation of state in modified gravity and observational constraints
• Neural network reconstruction of cosmology using the Pantheon compilation
• The $S_8$ Tension in Light of Updated Redshift-Space Distortion Data and PAge Approximation
• Prospect for cosmological parameter estimation using future Hubble parameter measurements
• Oscillating dark energy in light of the latest observations and its impact on the Hubble tension
• Measuring cosmic curvature with non-CMB observations
• Transit cosmological models in Myrzakulov F(R,T) gravity theory
• Revisiting the dynamics of interacting vector-like dark energy
• The simplest parametrization of equation of state parameter in the scalar field Universe
• Constraining minimally extended varying speed of light by cosmological chronometers
• The unified history of the viscous accelerating universe and phase transitions
• Model-independent cosmological inference after the DESI DR2 data with improved inverse distance ladder
• Cosmological Constraints on the Coupling Model from Observational Hubble Parameter and Baryon Acoustic Oscillation Measurements
• Reconstruction of late-time cosmology using Principal Component Analysis
• Updating constraints on phantom crossing $f(T)$ gravity
• Dark energy reconstructions combining BAO data with galaxy clusters and intermediate redshift catalogs
• Hubble tension in a nonminimally coupled curvature-matter gravity model
• New cosmological constraints on the evolution of dark matter energy density
• Constraints on Cosmological Models from Quasars Calibrated with Type Ia Supernova by a Gaussian Process
• Determination of cosmic curvature independent of the sound horizon and $H_0$ using BOSS/eBOSS and DESI DR1 BAO observations
• In search of an interaction in the dark sector through Gaussian Process and ANN approaches
• Constraints on Dark Energy Models Using Late Universe Probes
• Model-independent estimation of the cosmography parameters using cosmic chronometers
• Cosmological constraints from low-redshift data
• Spatial Curvature and Thermodynamics
• Dark Energy Nature in Logarithmic $f(R,T)$ Cosmology
• f(R) Gravity in an Ellipsoidal Universe
• Myrzakulov $F(T,Q)$ gravity: cosmological implications and constraints
• A unified TDiff invariant field theory for the dark sector
• Reconstructing the Hubble parameter with future Gravitational Wave missions using Machine Learning
• Joint Constraints on the Hubble Constant, Spatial Curvature, and Sound Horizon from the Late-time Universe with Cosmography
• The Reconstruction of Constant Jerk Parameter with $f(R,T)$ Gravity in Bianchi-I spacetime
• Standardizing the Gamma-ray burst as a standard candle and applying to the cosmological probes: constraints on the two-component dark energy model
• Analytical Gaussian Process Cosmography: Unveiling Insights into Matter-Energy Density Parameter at Present
• Bianchi type-V Transitioning model in Brans-Dicke theory with Observational Constraint
• Observational Constraints on the Dark Energy with a Quadratic Equation of State
• A possible late-time transition of $M_B$ inferred via neural networks
• Checking the second law at cosmic scales
• Null tests with Gaussian Process
• Observationally constrained accelerating cosmological model with higher power of non-metricity and squared trace
• Constraints on the Transition Redshift using Hubble Phase Space Portrait
• Renyi Holographic Dark Energy models in Teleparallel gravity
• Constraints on power law cosmology from cosmic chronometer, standard ruler, and standard candle data
• Propagation and Fluxes of Ultra High Energy Cosmic Rays in f(R) Gravity Theory
• Breaking the baryon-dark matter degeneracy in a model-independent way through the Sunyaev-Zeldovich effect
• Constraining deviations from $\Lambda$CDM in the Hubble expansion rate
• Reference level of the vacuum energy density of the Universe and astrophysical data
• A Reliable Calibration of HII Galaxies Hubble Diagram with Cosmic Chronometers and Artificial Neural Network
• Determination of the Kinematic Parameters from SNe Ia and Cosmic Chronometers
• Revisit of constraints on dark energy with Hubble parameter measurements including future redshift drift observations
• Modified Equations of State for Dark Energy and Observational Limitations
• Test of Artificial Neural Networks in Likelihood-free Cosmological Constraints: A Comparison of IMNN and DAE
• Hubble constant by natural selection: Evolution chips in the Hubble tension
• Review on the minimally extended varying speed of light model
• A Non-parametric Reconstruction of the Hubble Parameter $H(z)$ Based on Radial Basis Function Neural Networks
• Potentialities of Hubble parameter and expansion rate function data to alleviate Hubble tension
• Is there a dynamical tendency in H0 with late time measurements?
• Model-independent determination of cosmic curvature based on Padé approximation
• Dark energy with a shift-symmetric scalar field: obstacles, loophole hunting and dead ends
• Deep Learning and genetic algorithms for cosmological Bayesian inference speed-up
• Posing Constraints on the Free Parameters of a New Model of Dark Energy EoS : Responses Through Cosmological Behaviours
• The interaction of extended Bose-Einstein condensate dark matter with viscous $f(T,B)$ gravity
• Effects of anisotropy in an anisotropic extension of $w$CDM model
• Simultaneous measurements on cosmic curvature and opacity using latest HII regions and $H(z)$ observations
• Constraints on Cosmological Models with Gamma-Ray Bursts in Cosmology-Independent Way
• Reconstruction of the dark energy scalar field potential by Gaussian process
• Confronting quantum-corrected teleparallel cosmology with observations
• A More Accurate and Competitive Estimative of $H_0$ in Intermediate Redshifts
• Examining the validity of the minimal varying speed of light model through cosmological observations: relaxing the null curvature constraint
• What if the universe expands linearly? A local general relativity to solve the "zero active mass" problem
• Interacting Barrow Holographic Dark Energy in Non-flat Universe
• Observational constraints on the growth index parameters in $f(Q)$ gravity
• Dynamics of dark energy in a scalar-vector-torsion theory
• Investigating the $w$CDM Model with Latest DESI BAO Observations
• Beyond $\Lambda$CDM: Exploring a Dynamical Cosmological Constant Framework Consistent with Late-Time Observations
• Cosmological joint analysis with cosmic growth and expansion rate
• A possible role for the merger of clusters/voids in the cosmological expansion
• Multiple measurements on the cosmic curvature using Gaussian process regression without calibration and a cosmological model
• Thawing k-essence dark energy in the PAge space
• Model-independent Gamma-Ray Bursts Constraints on Cosmological Models Using Machine Learning
• Cosmological constraints on $R^2$-corrected Appleby-Battye model
• Constraints on Spatial Curvature and Dark Energy Dynamics in the $w$CDM Model from DESI DR1 and DR2
• Investigating the cosmic distance duality relation with gamma-ray bursts
• Constraints on the minimally extended varying speed of light model using the Pantheon+ dataset
• Phase-space analysis of torsion-coupled dilatonic ghost condensate
• Faster Bayesian inference with neural network bundles and new results for $f(R)$ models
• A comprehensive data-driven odyssey to explore the equation of state of dark energy
• A new parametrization of Hubble function and Hubble tension
• Endowing $\mathbf{\Lambda }$ with a dynamic nature: constraints in a spatially curved Universe
• Comparing Dark Energy models with Hubble versus Growth Rate data
• A New Parameterized Interacting Holographic Dark Energy
• Cosmological Dynamics in Interacting Scalar-Torsion f(T,$\varphi$) Gravity: Investigating Energy and Momentum Couplings
• Holography and matter creation revisited
• Gamma-Ray Bursts Calibrated from the Observational $H(z)$ Data in Artificial Neural Network Framework
• Reconstruction of the scalar field potential in nonmetricity gravity through Gaussian processes
• What Prevents Resolving the Hubble Tension through Late-Time Expansion Modifications?
• Fine Tuning Problem of the Cosmological Constant in a Generalized Randall-Sundrum Model
• Barrow holographic dark energy interacting model in the presence of radiation and matter
• Eternal vs singular observers in interacting dark energy-dark matter models
• Observational constraints using Bayesian statistics and Deep Learning in $f(Q)$ gravity
• High precision measurement of cosmic curvature: from gravitational waves and cosmic chronometer
• Quintessence scalar field and cosmological constant: Dynamics of a multi-component dark energy model
• Testing Lambert$W$ equation of state with observational Hubble parameter data
• Observational constraints on nonlinear matter extensions of general relativity: Separable trace power models
• Tsallis holographic dark energy model with event horizon cutoff in modified gravity
• When Dark Matter Heats Up: A Model-Independent Search for Non-Cold Behavior
• Implications of Dynamical Dark Energy in the expansion of the Universe and the Structure Formation
• Lyra's cosmology of homogeneous and isotropic universe in Brans-Dicke theory
• Novel Cosmological Joint Constraints in Multidimensional Observables Space with Redshift-free Inferences
• Exploring the Evolution of Nonlinear Electrodynamics in the Universe: A Dynamical Systems Approach
• Beyond Fisher Forecasting for Cosmology
• Effect of Peak Absolute Magnitude of Type Ia Supernovae and Sound Horizon Values on Hubble Tension using DESI results
• Anisotropic cosmology in Bumblebee gravity theory
• ParamANN: A Neural Network to Estimate Cosmological Parameters for $\Lambda$CDM Universe Using Hubble Measurements
• Observational constraints on cosmological parameters in the Bianchi type III Universe with f(R,T) gravity theory
• Stringent constraint on the CCC+TL cosmology with $H(z)$ Measurements
• Is Dark Energy Changing? Probing the Universe's Expansion with present and future astronomical probes
• Cosmic expansion beyond $\Lambda$CDM: Investigating power-law and logarithmic corrections
• Accelerating Universe in Higher Dimensional Space Time : an alternative approach
• Equivalence of Dark Energy Models: A Theoretical and Bayesian Perspective
• Constraining the swiss-cheese IR-fixed point cosmology with cosmic expansion
• Quintessence and tachyon dark energy in interaction with dark matter: Observational constraints and model selection
• Testing the Constancy of Type Ia Supernova Luminosities with Gaussian Process
• Constraining Axially Symmetric Bianchi Type I Model with Self-Consistent Recombination History and Observables
• Model-independent reconstruction of the cosmological scale factor as a function of lookback time
• Time to Sparkler. Accurate ages of lensed globular clusters at $z=1.4$ with JWST photometry
• Mimicking the $\Lambda$CDM Universe through inhomogeneous space-time
• New $H(z)$ measurement at Redshift = 0.12 with DESI Data Release 1
• Unimodular Theory of Gravity in Light of the Latest Cosmological Data
• Reconstructing cosmic evolution with a density parametrization
• On Direct Estimation of Density Parameters and Hubble Constant for $\Lambda$CDM Universe using Hubble Measurements
• Derivative hierarchy as the origin of kernel-dependent trends in Gaussian process reconstructions of the hubble parameter
• Estimating Cosmological Parameters and Reconstructing Hubble Constant with Artificial Neural Networks: A Test with covariance matrix and mock H(z)
• Gamma-Ray Bursts Calibrated by Using Artificial Neural Networks from the Pantheon+ Sample
• Barboza-Alcaniz Equation of State Parametrization : Constraining the Parameters in Different Gravity Theories
• Can dark energy explain a high growth index?
• Quintessence dark energy model in non-linear $f(Q)$ theory with bulk-viscosity
• Towards a Machine Learning Solution for Hubble Tension: Physics-Informed Neural Network (PINN) Analysis of Tsallis Holographic Dark Energy in Presence of Neutrinos
• Inference of cosmological models with principal component analysis
• A semi-cosmographic approach to study cosmological evolution in phase space
• Cosmological constraints on the big bang quantum cosmology model
• Confronting Einstein Yang Mills Higgs Dark Energy in light of observations
• An Alternative Approach to the Exact Solution of FRW-Type Spacetime with a Generalized Chaplygin Gas
• Some Classes of Interacting Two-Fluid Model of the Expanding Universe
• Observational Constraints on Chaplygin Gas Models in Non-Minimally Coupled Power Law $f(Q)$ Gravity with Quasars
• Cosmic Acceleration Caused by the Extra-Dimensional Evolution in a Generalized Randall-Sundrum Model
• Cosmological Model Independent Constraints on Lorentz Invariance Violation with Updated Gamma-Ray Burst Observations: An Artificial Neural Network Approach
• Kinematical models of latetime cosmology and the statefinder diagnostic
• Model-independent reconstruction of cosmic thermodynamics and dark energy dynamics
• FLRW Kinematic-Induced Measurement of the Hubble Constant from Cosmic Chronometer and Redshift Drift Observations
• Cosmography via stellar archaeology of low-redshift early-type galaxies from SDSS
• The averaging problem on the past null cone in inhomogeneous dust cosmologies
• Is Dark Energy an Effective Manifestation of Non-equilibrium Thermodynamics? -- Insights from DESI
• Cosmic Dynamics in Einstein-Cartan Theory: Analysing Hubble Tension through Curvature and Torsion field
• Probing the Hubble Tension with an Infinite-Future Condition on the Hubble Parameter
• Nature-inspired optimization, the Philippine Eagle, and cosmological parameter estimation
• The dynamics of background evolution and structure formation in phase space: a semi-cosmographic reconstruction
• Optimizing Gaussian Process Kernels Using Nested Sampling and ABC Rejection for H(z) Reconstruction
• Genetic algorithm demystified for cosmological parameter estimation
• Intermediate redshift calibration of Gamma-ray Bursts and cosmic constraints in non-flat cosmology
• $G_3$ -- interacting scalar tensor dark energy
• Constraints on AvERA Cosmologies from Cosmic Chronometers and Type Ia Supernovae
• Constraining the Hubble Constant with a Simulated Full Covariance Matrix Using Neural Networks
• EFT of Dark Energy with Cosmic Chronometers: Reconstructing Background EFT Functions
• Cosmic chronometers with galaxy clusters: a new avenue for multi-probe cosmology
• Implications of a high growth index on the variation of $G$
• Observational Constraints and Geometric Diagnostics of Barboza-Alcaniz and Logarithmic Dark Energy Parametrizations
• Background dynamics and observational constraints of flat and non-flat $\Lambda (t)$CDM models from $H(z)$ and DESI DR2 BAO measurements
• Testing the CCC+TL cosmology with cosmic-chronometer measurements of the Hubble parameter