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Indexed by:期刊论文

Date of Publication:2011-05-16

Journal:PHYSICS LETTERS B

Included Journals:SCIE

Volume:699

Issue:4

Page Number:246-250

ISSN No.:0370-2693

Key Words:Kinematical approach; Deceleration parameter; Jerk parameter

Abstract: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.