2013/12/31 by Yun Chen, Chao-Qiang Geng, Shuo Cao +2 · 2 citations
Physics and Astronomy · #Cosmology #Cosmology and Gravitation Theories #Dark energy #Galaxies: Formation, Evolution, Phenomena #Gamma-ray bursts and supernovae #Gravitation #Gravitational lens #Hubble volume #Hubble's law #Strong gravitational lensing #Weak gravitational lensing #astro-ph.CO #gr-qc
paper · pdf · doi:10.1088/1475-7516/2015/02/010
published as JCAP 02 (2015) 010 · 21 pages, 3 figures, revised version accepted by JCAP
arxiv created 2015/01/18 · arxiv updated 2015/02/10 · openalex publication_date 2015/02/10 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We constrain the scalar field dark energy model with an inverse power-law potential, i.e., V (ϕ) ∝ ϕ −α (α > 0), from a set of recent cosmological observations by compiling an updated sample of Hubble parameter measurements including 30 independent data points. Our results show that the constraining power of the updated sample of H ( z ) data with the HST prior on H 0 is stronger than those of the SCP Union2 and Union2.1 compilations. A recent sample of strong gravitational lensing systems is also adopted to confine the model even though the results are not significant. A joint analysis of the strong gravitational lensing data with the more restrictive updated Hubble parameter measurements and the Type Ia supernovae data from SCP Union2 indicates that the recent observations still can not distinguish whether dark energy is a time-independent cosmological constant or a time-varying dynamical component.