Probing interaction and spatial curvature in the holographic dark energy model

2009/10/31 by Miao Li, Xiao-Dong Li, Shuang Wang +2
Physics and Astronomy · #Astrophysics #Black Holes and Theoretical Physics #Classical mechanics #Cosmological perturbation theory #Cosmology #Cosmology and Gravitation Theories #Curvature #Dark energy #Dark matter #Galaxies: Formation, Evolution, Phenomena #Geometry #Holography #Optics #Physics #Theoretical physics #astro-ph.CO #gr-qc #hep-ph #hep-th

paper · pdf · doi:10.1088/1475-7516/2009/12/014

published as JCAP 0912:014,2009 · 11 pages, 5 figures; to appear in JCAP

arxiv created 2009/11/25 · openalex publication_date 2009/12/11 · arxiv updated 2014/11/20 · openalex created_date 2020/11/23 · openalex updated_date 2026/08/06

Abstract

In this paper we place observational constraints on the interaction and spatial curvature in the holographic dark energy model. We consider three kinds of phenomenological interactions between holographic dark energy and matter, i.e., the interaction term Q is proportional to the energy densities of dark energy (ρ Λ ), matter (ρ m ), and matter plus dark energy (ρ m +ρ Λ ). For probing the interaction and spatial curvature in the holographic dark energy model, we use the latest observational data including the type Ia supernovae (SNIa) Constitution data, the shift parameter of the cosmic microwave background (CMB) given by the five-year Wilkinson Microwave Anisotropy Probe (WMAP5) observations, and the baryon acoustic oscillation (BAO) measurement from the Sloan Digital Sky Survey (SDSS). Our results show that the interaction and spatial curvature in the holographic dark energy model are both rather small. Besides, it is interesting to find that there exists significant degeneracy between the phenomenological interaction and the spatial curvature in the holographic dark energy model.

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