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论文类型：期刊论文

发表时间：2010-11-30

发表刊物：MODERN PHYSICS LETTERS A

收录刊物：SCIE、Scopus

卷号：25

期号：36

页面范围：3033-3046

ISSN号：0217-7323

关键字：Cosmic acceleration; kinematical approach; dynamical approach

摘要：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.