Effect of low anisotropy on cosmological models by using supernova data

Abstract

By using the supernovae type Ia data we study influence of the anisotropy (although low) on the evolution of the universe and compare $\Lambda$CDM model with 6 representative parametrizations of the recent Hubble expansion history $H(z)$. To compare these models we use the the maximum likelihood method for find that the best fit dynamical $\omega (z)$ and $q(z)$ obtained from the SNIa dataset. In particular we find the best fit value of $\Lambda$CDM model $({\Omega }_{{\sigma }_0}=0.013$, ${\chi }_{min}^2=197.56)$. The analysis shows that by considering the anisotropy, it leads to more best fit parameters in all models (except of SCDM) with SNIa data. We also use two statistical tests such as the usual ${\chi }_{min}^2/dof$ and p-test to compare different dark energy models. According to both statistical tests and considering anisotropy, the linear parametrization model that is providing the best fit to $\Lambda$CDM model.

References in corpus (92)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters
• Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
• Dynamics of dark energy
• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Detection of the Baryon Acoustic Peak in the Large-Scale Correlation Function of SDSS Luminous Red Galaxies
• Type Ia Supernova Discoveries at z>1 From the Hubble Space Telescope: Evidence for Past Deceleration and Constraints on Dark Energy Evolution
• Cosmological parameters from SDSS and WMAP
• A Phantom Menace? Cosmological consequences of a dark energy component with super-negative equation of state
• The Case for a Positive Cosmological Lambda-term
• The Complete Light-curve Sample of Spectroscopically Confirmed Type Ia Supernovae from Pan-STARRS1 and Cosmological Constraints from The Combined Pantheon Sample
• Cosmology and the Fate of Dilatation Symmetry
• An alternative to quintessence
• The Supernova Legacy Survey: Measurement of Omega_M, Omega_Lambda and w from the First Year Data Set
• Phantom Energy and Cosmic Doomsday
• Generalized Chaplygin Gas, Accelerated Expansion and Dark Energy-Matter Unification
• A Dynamical Solution to the Problem of a Small Cosmological Constant and Late-time Cosmic Acceleration
• Improved cosmological constraints from a joint analysis of the SDSS-II and SNLS supernova samples
• Essentials of k-essence
• Cosmological Results from High-z Supernovae
• Kinetically Driven Quintessence
• Spectra and Light Curves of Six Type Ia Supernovae at 0.511 < z < 1.12 and the Union2 Compilation
• Dark Energy Constraints from the Cosmic Age and Supernova
• Quintessence and the Rest of the World
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Implications for Inflation
• Unification of Dark Matter and Dark Energy: the Inhomogeneous Chaplygin Gas
• Improved Dark Energy Constraints from ~100 New CfA Supernova Type Ia Light Curves
• Improved Distances to Type Ia Supernovae with Multicolor Light Curve Shapes: MLCS2k2
• The Reddening-Free Decline Rate Versus Luminosity Relationship for Type Ia Supernovae
• Scrutinizing Exotic Cosmological Models Using ESSENCE Supernova Data Combined with Other Cosmological Probes
• The Supernova Legacy Survey 3-year sample: Type Ia Supernovae photometric distances and cosmological constraints
• Dark Matter and Dark Energy
• A New Cosmological Model of Quintessence and Dark Matter
• Can the Chaplygin gas be a plausible model for dark energy?
• Role of Modified Chaplygin Gas in Accelerated Universe
• Reconstructing the Cosmic Equation of State from Supernova distances
• The case for dynamical dark energy revisited
• Uncorrelated Estimates of Dark Energy Evolution
• Comparison of the Legacy and Gold SnIa Dataset Constraints on Dark Energy Models
• Crossing the Phantom Divide: Theoretical Implications and Observational Status
• Using SN Ia Light Curve Shapes to Measure The Hubble Constant
• Future Supernovae observations as a probe of 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
• SALT: a Spectral Adaptive Light curve Template for Type Ia Supernovae
• Cosmological parameters from supernova observations: A critical comparison of three data sets
• New dark energy constraints from supernovae, microwave background and galaxy clustering
• WMAP Constraints on the Generalized Chaplygin Gas Model
• A comparison of cosmological models using recent supernova data
• SiFTO: An Empirical Method for Fitting SNe Ia Light Curves
• Latest Supernova data in the framework of Generalized Chaplygin Gas model
• Reconstruction of the deceleration parameter and the equation of state of dark energy
• Measuring the Equation-of-state of the Universe: Pitfalls and Prospects
• Model-Independent Constraints on Dark Energy Density from Flux-averaging Analysis of Type Ia Supernova Data
• Generalized Chaplygin gas as a unified scenario of dark matter/energy: observational constraints
• Opportunities for future supernova studies of cosmic acceleration
• Future supernovae data and quintessence models
• Crossing the Phantom Divide Barrier with Scalar Tensor Theories
• Do SNe Ia Provide Direct Evidence for Past Deceleration of the Universe?
• Improved Constraints on the Acceleration History of the Universe and the Properties of the Dark Energy
• High-redshift objects and the generalized Chaplygin gas
• Supernovae and the Nature of the Dark Energy
• Generalized Chaplygin Gas Model: Dark Energy - Dark Matter Unification and CMBR Constraints
• Generalized Chaplygin gas model: constraints from Hubble parameter versus Redshift Data
• Binned Cosmic Microwave Background Anisotropy Power Spectra: Peak Location
• Fast and Efficient Template Fitting of Deterministic Anisotropic Cosmological Models Applied to WMAP Data
• A Comparative Analysis of the Supernova Legacy Survey Sample with ΛCDM and the $R_{\mathrm{h}}=ct$ Universe
• Mapping the large-scale anisotropy in the WMAP data
• Energy conditions and current acceleration of the universe
• Probing the anisotropic expansion from supernovae and GRBs in a model-independent way
• Constraining the Cosmological Parameters and Transition Redshift with Gamma-Ray Bursts and Supernovae
• Observational constraint on generalized Chaplygin gas model
• Median Statistics and the Mass Density of the Universe
• Measuring Dark Energy with Gamma-Ray Bursts and Other Cosmological Probes
• The $\Lambda \mathrm{CDM}$ Limit of the Generalized Chaplygin Gas Scenario
• Supernova constraints on alternative models to dark energy
• CMB Anisotropy Constraints on Open and Flat-Lambda CDM Cosmogonies from UCSB South Pole, ARGO, MAX, White Dish, and SuZIE Data
• Warm Anisotropic Inflationary Universe Model
• Supernova data may be unable to distinguish between quintessence and k-essence
• Testing the isotropy of the Universe with type Ia supernovae in a model-independent way
• Spectral classification and composites of galaxies in LAMOST DR4
• Determining the equation of state of dark energy from angular size of compact radio sources and X-ray gas mass fraction of galaxy clusters
• Cosmic acceleration in brane cosmology
• Testing the anisotropy of cosmic acceleration from Pantheon supernovae sample
• Revisiting the interacting model of new agegraphic dark energy
• Anisotropic inflation in Brans-Dicke gravity
• Clarifying Forecasts of Dark Energy Constraints from Baryon Acoustic Oscillations
• Strong gravitational lensing constraints on holographic dark energy
• A Reconstruction of Quintessence Dark Energy
• A new alternative model to dark energy
• Quintessence Cosmology with an Effective $\Lambda$-Term in Lyra Manifold