A Comparative Study of Dark Energy Constraints from Current Observational Data

  title={A Comparative Study of Dark Energy Constraints from Current Observational Data},
  author={Yun Wang and Chia-Hsun Chuang and Pia Mukherjee},
  journal={Physical Review D},
We examine how dark energy constraints from current observational data depend on the analysis methods used: the analysis of Type Ia supernovae (SNe Ia), and that of galaxy clustering data. We generalize the flux-averaging analysis method of SNe Ia to allow correlated errors of SNe Ia, in order to reduce the systematic bias due to weak lensing of SNe Ia. We find that flux-averaging leads to larger errors on dark energy and cosmological parameters if only SN Ia data are used. When SN Ia data (the… 

Comparing dark energy models with current observational data

We make a comparison for thirteen dark energy (DE) models by using current cosmological observations, including type Ia supernova, baryon acoustic oscillations, and cosmic microwave background. To

Improving dark energy constraints with high-redshift Type Ia supernovae from CANDELS and CLASH

Aims. We investigated the degree of improvement in dark energy constraints that can be achieved by extending Type Ia supernova (SN Ia) samples to redshifts z > 1:5 with the Hubble Space Telescope

Exploring JLA supernova data with improved flux-averaging technique

In this work, we explore the cosmological consequences of the ``Joint Light-curve Analysis'' (JLA) supernova (SN) data by using an improved flux-averaging (FA) technique, in which only the type Ia

Probing Cosmic Acceleration Using Model-independent Parameterizations and Three Kinds of Supernova Statistics Techniques

In this work, we explore the evolution of the dark energy equation of state ω using Chevalliear–Polarski–Linder parameterization and binned parameterizations. For binned parameterizations, we adopt

Testing modified gravity models with recent cosmological observations

We explore the cosmological implications of five modified gravity (MG) models by using the recent cosmological observational data, including the recently released SNLS3 type Ia supernovae sample, the

Cosmological constraint on Brans-Dicke Model

We combine new Cosmic Microwave Background (CMB) data from Planck with Baryon Acoustic Oscillation (BAO) data to constrain the Brans-Dicke (BD) theory, in which the gravitational constant G evolves

Testing cosmic acceleration for w(z) parametrizations using fgas measurements in galaxy clusters

In this paper we study the cosmic acceleration for five dynamical dark energy models whose equation of state varies with redshift. The cosmological parameters of these models are constrained by

Strong Lensing Modeling in Galaxy Clusters as a Promising Method to Test Cosmography. I. Parametric Dark Energy Models

In this paper we probe five cosmological models for which the dark energy equation of state parameter, w(z), is parameterized as a function of redshift using strong lensing data in the galaxy cluster

A Robust Distance Measurement and Dark Energy Constraints from the Spherically-Averaged Correlation Function of Sloan Digital Sky Survey Luminous Red Galaxies

We measure the effective distance to z = 0.26, DV (0.26), and mh 2 from the overall shape of the spherically-averaged two-point correlati on function of the Sloan Digital Sky Survey (SDSS) Data

Supernovae as probes of cosmic parameters: estimating the bias from under-dense lines of sight

Correctly interpreting observations of sources such as type Ia supernovae (SNe Ia) require knowledge of the power spectrum of matter on AU scales — which is very hard to model accurately. Because



Inflation and quantum cosmology.

The paper presents the following chapters: Chaotic inflation ― Self-reproducing inflationary universe ― Adjusting to the new paradigm: absence of cosmological constraints on the axion mass in the

Normalized covariance matrix of H(z)/H0 from current data 1 2 3 1

  • JCAP, 03,
  • 2005

arXiv:1106.3366, MNRAS, in press

  • 2011