Constraints on kinematic models from the latest observational data

2011/05/10 by Jianbo Lu, Lixin Xu, Molin Liu · 1 citation
Physics and Astronomy · #astro-ph.CO

paper · pdf · doi:10.1016/j.physletb.2011.04.022

published as Physics Letters B 699 (2011) 246-250 · 8 pages, 2 figures

arxiv created 2011/05/10 · arxiv updated 2015/05/28

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 q₀, jerk parameter j₀ and transition redshift z_T, are obtained. Furthermore, we show the departures for two parameterized kinematical models from ΛCDM 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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