We investigate the prospects for determining the accelerating history of the Universe from upcoming measurements of the expansion rate H(z). In our analyses, we use Monte Carlo simulations based on wCDM models to generate samples with different characteristics and calculate the evolution of the deceleration parameter q(z). We show that a cosmographic (and, therefore, model-independent) evidence for cosmic acceleration (q(z<zt)<0, where zt is the transition redshift) will only be possible with an accuracy in H(z) data greater than the expected in current planned surveys. A brief discussion about the prospects for reconstructing the dark energy equation of state from the parameters H(z) and q(z) is also included.
@article{arxiv.1102.5319,
title = {Cosmography and cosmic acceleration},
author = {J. C. Carvalho and J. S. Alcaniz},
journal= {arXiv preprint arXiv:1102.5319},
year = {2012}
}