On the theory and applications of modern cosmography

@article{Dunsby2015OnTT,
  title={On the theory and applications of modern cosmography},
  author={P K S Dunsby and Orlando Luongo},
  journal={arXiv: General Relativity and Quantum Cosmology},
  year={2015}
}
  • P. Dunsby, O. Luongo
  • Published 20 November 2015
  • Physics
  • arXiv: General Relativity and Quantum Cosmology
Cosmography represents an important branch of cosmology which aims to describe the universe without the need of postulating \emph{a priori} any particular cosmological model. All quantities of interest are expanded as a Taylor series around here and now, providing in principle, a way of directly matching with cosmological data. In this way, cosmography can be regarded a model-independent technique, able to fix cosmic bounds, although several issues limit its use in various model reconstructions… 

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References

SHOWING 1-10 OF 86 REFERENCES

Cosmographic Constraints and Cosmic Fluids

The problem of reproducing dark energy effects is reviewed here with particular interest devoted to cosmography. We summarize some of the most relevant cosmological models, based on the assumption

Cosmography and constraints on the equation of state of the Universe in various parametrizations

We use cosmography to present constraints on the kinematics of the Universe, without postulating any underlying theoretical model. To this end, we use a Monte Carlo Markov Chain analysis to perform

Cosmography: Cosmology without the Einstein equations

How much of modern cosmology is really cosmography? How much of modern cosmology is independent of the Einstein equations? (Independent of the Friedmann equations?) These questions are becoming

COSMOGRAPHY WITH THE HUBBLE PARAMETER

In this paper we investigate the possibility to obtain constraints on the kinematics of the Universe in a flat Friedmann–Robertson–Walker cosmology, through the use of the so-called Cosmography. The

Cosmographic analysis of the equation of state of the universe through Padé approximations

Cosmography is used in cosmological data processing in order to constrain the kinematics of the universe in a model-independent way, providing an objective means to evaluate the agreement of a model

Statistical Methods in Cosmology

The advent of large data set in cosmology has meant that in the past 10 or 20 years our knowledge and understanding of the Universe has changed not only quantitatively but also, and most importantly,

Is cosmography a useful tool for testing cosmology

Model-independent methods in cosmology has become an essential tool in order to deal with an increasing number of theoretical alternatives for explaining the late-time acceleration of the Universe.

An expanding Universe with constant pressure and no cosmological constant

Thanks to its fitting triumph, the ΛCDM paradigm is assumed to be the most powerful model, for describing the Universe dynamics, over much the myriad of cosmological models. Unfortunately, the quest

Testing the LCDM model (and more) with the time evolution of the redshift

With the many ambitious proposals afoot for new generations of very large telescopes, along with spectrographs of unprecedented resolution, there arises the real possibility that the time evolution

Updated constraints on f(R) gravity from cosmography

We address the issue of constraining the class of $f(\mathcal{R})$ gravity able to reproduce the observed cosmological acceleration, by using the so-called cosmography of the Universe. We consider a
...