Constraining the Anisotropy of the Universe from Supernovae and Gamma-ray Bursts

Abstract

Recently, an anisotropic cosmological model was proposed. An arbitrary 1-form, which picks out a privileged axis in the universe, was added to the Friedmann-Robertson-Walker line element. The distance-redshift relation was modified such that it is direction dependent. In this paper, we use the Union2 dataset and 59 high-redshift gamma-ray bursts to give constraints on the anisotropy of the universe. The results show that the magnitude of anisotropy is about $D=-0.044\pm 0.018$, and the privileged axis points towards the direction $(l_0,b_0)=(306.1^{\circ }\pm 18.7^{\circ },-18.2^{\circ }\pm 11.2^{\circ })$ in the galactic coordinate system. The anisotropy is small and the isotropic cosmological model is an excellent approximation.

arXiv comment10 pages, 3 figures

References in corpus (32)

• Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
• Detection of the Baryon Acoustic Peak in the Large-Scale Correlation Function of SDSS Luminous Red Galaxies
• Spectra and Light Curves of Six Type Ia Supernovae at 0.511 < z < 1.12 and the Union2 Compilation
• A high resolution foreground cleaned CMB map from WMAP
• Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Are There Cosmic Microwave Background Anomalies?
• GRB 090423 at a redshift of z~8.1
• Thick gas discs in faint dwarf galaxies
• Dipole Anisotropy in the COBE DMR First-Year Sky Maps
• The Hubble Diagram to Redshift >6 from 69 Gamma-Ray Bursts
• Consistently Large Cosmic Flows on Scales of 100 Mpc/h: a Challenge for the Standard LCDM Cosmology
• A measurement of large-scale peculiar velocities of clusters of galaxies: results and cosmological implications
• Galaxies in LCDM with Halo Abundance Matching: luminosity-velocity relation, baryonic mass-velocity relation, velocity function and clustering
• Large-angle anomalies in the CMB
• Gamma Ray Bursts: new rulers to measure the Universe
• The Dipole Observed in the COBE DMR Four-Year Data
• Optimal limits on f_{NL}^{local} from WMAP 5-year data
• Mapping extreme-scale alignments of quasar polarization vectors
• Cosmic flow from 2MASS redshift survey: The origin of CMB dipole and implications for LCDM cosmology
• Searching for a Cosmological Preferred Axis: Union2 Data Analysis and Comparison with Other Probes
• Observational Constraints on Cosmological Models with the Updated Long Gamma-Ray Bursts
• Low-order multipole maps of CMB anisotropy derived from WMAP
• Constraints on anisotropic cosmic expansion from supernovae
• The Gamma-Ray Burst Hubble Diagram and Its Cosmological Implications
• Constraining the Anisotropic Expansion of Universe
• Direction Dependence of the Deceleration Parameter
• Anisotropy of Cosmic Acceleration
• Cosmological model with local symmetry of very special relativity and constraints on it from supernovae
• The axis of evil - a polarization perspective
• Inflation and primordial power spectra at anisotropic spacetime inspired by Planck's constraints on isotropy of CMB
• Ultra-compact radio sources and the isotropy and homogeneity of the Universe
• GRB Hubble diagram and constraints on a Λ(t)CDM model

Cited by in corpus (22)

• Testing the isotropy of the Universe by using the JLA compilation of type-Ia supernovae
• Probing Cosmological Isotropy With Type IA Supernovae
• Anisotropy of the Universe via the Pantheon supernovae sample revisited
• Null Signal for the Cosmic Anisotropy in the Pantheon Supernovae Data
• The significance of anisotropic signals hiding in the type Ia supernovae
• Bianchi I meets the Hubble diagram
• Constraining the anisotropy of the Universe via Pantheon supernovae sample
• Isotropy of low redshift type Ia Supernovae: A Bayesian analysis
• A unified description for dipoles of the fine-structure constant and SnIa Hubble diagram in Finslerian universe
• Model-independent distance calibration of high-redshift gamma-ray bursts and constrain on the $\Lambda$CDM model
• Testing the Cosmic Anisotropy with Supernovae Data: Hemisphere Comparison and Dipole Fitting
• Are long gamma-ray bursts standard candles?
• Model-independently calibrating the luminosity correlations of gamma-ray bursts using deep learning
• Cosmological Constant, Fine Structure Constant and Beyond
• A tomographic test of cosmological principle using the JLA compilation of type Ia supernovae
• Searching for a Cosmological Preferred Axis in complicated class of cosmological models:Case study $f(R,T)$ model
• Searching for a cosmological preferred direction with 147 rotationally supported galaxies
• Cosmic Anisotropy and Fast Radio Bursts
• Searching for Cosmological Preferred Axis using cosmographic approach
• Finslerian dipolar modulation of the CMB power spectra at scales $2<l<600$
• Lorentz Violation in Finsler Geometry
• The Two-Point Correlation Function of Gamma-ray Bursts