Published July 1, 2014 | Version v1
Journal article Metadata-only

MODEL-INDEPENDENT DETERMINATION OF CURVATURE PARAMETER USING H(z) AND DA (z) DATA PAIRS FROM BAO MEASUREMENTS

Creators

  • 1. Department of Physics, Tsinghua University, Beijing 100084 (China)
  • 2. Department of Astronomy, Beijing Normal University, Beijing 100875 (China)

Description

We present a model-independent determination of the curvature parameter Ω k using the Hubble parameter H(z) and the angular diameter distance DA (z) from recent baryon acoustic oscillation (BAO) measurements. Each H(z) and DA (z) pair from a BAO measurement can constrain a curvature parameter. The accuracy of the curvature measurement improves with increased redshift of H(z) and DA (z) data. By using the H(z) and DA (z) pair derived from a BAO Lyman α forest measurement at z = 2.36, the Ω k is confined to be –0.05 ± 0.06, which is consistent with the curvature of −0.037−0.042+0.044 constrained by the nine year Wilkinson Microwave Anisotropy Probe data only. Considering future BAO measurements, at least one order of magnitude improvement of this curvature measurement can be expected

Availability note (English)

Available from http://dx.doi.org/10.1088/2041-8205/789/1/L15

Additional details

Identifiers

DOI
10.1088/2041-8205/789/1/L15;

Publishing Information

Journal Title
Astrophysical Journal Letters
Journal Volume
789
Journal Issue
1
Journal Page Range
[5 p.]
ISSN
2041-8205

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
46071078
Subject category
S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
Descriptors DEI
ACCURACY; ANISOTROPY; ASTROPHYSICS; BARYONS; COSMOLOGY; LYMAN LINES; MICROWAVE RADIATION; OSCILLATIONS; PROBES; RED SHIFT
Descriptors DEC
ELECTROMAGNETIC RADIATION; ELEMENTARY PARTICLES; FERMIONS; HADRONS; PHYSICS; RADIATIONS