Constraints on kinematic models from the latest observational data

Details Constraints on kinematic models from the latest observational data Constraints on kinematic models from the latest observational data

2011-05-10

arxiv.org/abs/1105.1871v1

Physics Letters B 699 (2011) 246-250

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

8 pages, 2 figures

Scientific paper

Kinematical models are constrained by the latest observational data from geometry-distance measurements, which include 557 type Ia supernovae (SNIa) Union2 data and 15 observational Hubble data. Considering two parameterized deceleration parameter, the values of current deceleration parameter $q_{0}$, jerk parameter $j_{0}$ and transition redshift $z_{T}$, are obtained. Furthermore, we show the departures for two parameterized kinematical models from $\Lambda$CDM model according to the evolutions of jerk parameter $j(z)$. Also, it is shown that the constraint on jerk parameter $j(z)$ is weak by the current geometrical observed data.

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