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Indexed by:期刊论文

Date of Publication:2010-11-30

Journal:MODERN PHYSICS LETTERS A

Included Journals:SCIE、Scopus

Volume:25

Issue:36

Page Number:3033-3046

ISSN No.:0217-7323

Key Words:Cosmic acceleration; kinematical approach; dynamical approach

Abstract:The kinematical model j(z) = j(0) and dynamical model w(de)(z) = w(0), are constrained from the latest observational data: Union2 data including 557 type Ia supernovae (SNIa), 15 observational Hubble data (OHD), baryon acoustic oscillation (BAO) data from Sloan Digital Sky Survey (SDSS) and Two-degree Field Galaxy Redshift Survey (2dFGRS) and CMB data from seven-year WMAP. We get the current values of deceleration parameter q(0), jerk parameter j(0), dimensionless matter density Omega(m), equation of state for dark energy w(0) and transition redshift z(T). Furthermore, it is shown that for both kinematical and dynamical models,the constraint results support for the cosmic concordance model, Lambda CDM.