Reconstruction of a Deceleration Parameter from the Latest Type Ia Supernovae Gold Dataset

Abstract

In this paper, a parameterized deceleration parameter $q(z)=1/2-a/(1+z{)}^b$ is reconstructed from the latest type Ia supernovae gold dataset. It is found out that the transition redshift from decelerated expansion to accelerated expansion is at $z_T=0.35_{-0.07}^{+0.14}$ with $1\sigma$ confidence level in this parameterized deceleration parameter. And, the best fit values of parameters in $1\sigma$ errors are $a=1.56_{-0.55}^{+0.99}$ and $b=3.82_{-2.27}^{+3.70}$.

5 pages, 2 figures, 1 table

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