# Cosmography: Cosmology without the Einstein equations

@article{Visser2005CosmographyCW, title={Cosmography: Cosmology without the Einstein equations}, author={Matt Visser}, journal={General Relativity and Gravitation}, year={2005}, volume={37}, pages={1541-1548} }

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 increasingly germane—as the models cosmologists use for the stress-energy content of the universe become increasingly baroque, it behaves us to step back a little and carefully disentangle cosmological kinematics from cosmological dynamics. The use of basic symmetry principles (such as the cosmological…

## 171 Citations

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The success of modern physical theories is abundantly demonstrated by an impressive amount of examples, may it be in the small dimensions of the quantum world or on cosmologically large scales.…

## References

SHOWING 1-7 OF 7 REFERENCES

Jerk, snap, and the cosmological equation of state

- Physics
- 2003

Taylor expanding the cosmological equation of state around the current epoch is the simplest model one can consider that does not make any a priori restrictions on the nature of the cosmological…

Gravitation and Cosmology: Principles and Applications of the General Theory of Relativity

- Physics
- 1973

A leading physicist delves into relativity and experimental applications Gravitation and Cosmology: Principles and Applications of the General Theory of Relativity offers a Nobel laureate's…

The Luminosity Distance, the Equation of State, and the Geometry of the Universe

- Physics
- 1998

The second derivative of the luminosity distance with respect to the redshift is written in terms of the deceleration parameter $q_0$. We point out that the third derivative contains the information…

Precision Cosmology? Not Just Yet . . .

- PhysicsScience
- 2003

The recent announcement from the Wilkinson Microwave Anisotropy Probe (WMAP) satellite experiment combined with other recent advances in observational cosmology verifies key components of the…

Expansion, geometry, and gravity

- Physics
- 2004

In general-relativistic cosmological models, the expansion history, matter content, and geometry are closely intertwined. In this brief paper, we clarify the distinction between the effects of…

Type Ia supernova discoveries at z > 1 from the Hubble Space Telescope: Evidence for past deceleration and constraints on dark energy evolution

- Physics
- 2004

We have discovered 16 Type Ia supernovae (SNe Ia) with the Hubble Space Telescope (HST) and have used them to provide the first conclusive evidence for cosmic deceleration that preceded the current…