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

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dc.creatorXu, Lixin
dc.creatorZhang, Chengwu
dc.creatorChang, Baorong
dc.creatorLiu, Hongya
dc.date2007-01-17
dc.date.accessioned2026-07-07T07:41:21Z
dc.date.available2026-07-07T07:41:21Z
dc.descriptionIn 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 $z_T=0.35^{+0.14}_{-0.07}$ with $1σ$ confidence level in this parameterized deceleration parameter. And, the best fit values of parameters in $1σ$ errors are $a=1.56^{+0.99}_{-0.55}$ and $b=3.82^{+3.70}_{-2.27}$.
dc.description5 pages, 2 figures, 1 table
dc.identifierhttps://arxiv.org/abs/astro-ph/0701490
dc.identifierhttp://arxiv.org/abs/astro-ph/0701490
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/122076
dc.subjectAstrophysics
dc.titleReconstruction of a Deceleration Parameter from the Latest Type Ia Supernovae Gold Dataset
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