Constraints on kinematic models from the latest observational data

Kinematical models are constrained by the latest observational data from geometry-distance measurements, which include 557 type la supernovae (SNIa) Union2 data and 15 observational Hubble data. Considering two parameterized deceleration parameter, the values of current deceleration parameter go, jerk parameter J(0) and transition redshift z(T), are obtained. Furthermore, we show the departures for two parameterized kinematical models from ACDM 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. (C) 2011 Elsevier B.V. All rights reserved.