Constraints on kinematic models from the latest observational data |
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Authors: | Jianbo Lu Lixin Xu Molin Liu |
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Institution: | 1. Department of Physics, Liaoning Normal University, Dalian 116029, PR China;2. Korea Astronomy and Space Science Institute, Daejon 305-348, Republic of Korea;3. School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, PR China;4. College of Physics and Electronic Engineering, Xinyang Normal University, Xinyang 464000, PR China |
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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 zT, 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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Keywords: | Kinematical approach Deceleration parameter Jerk parameter |
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