Constraints on kinematic models from the latest observational data

Abstract

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.

8 pages, 2 figures

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