Precision Cosmology? Not Just Yet . . .

@article{Bridle2003PrecisionCN,
  title={Precision Cosmology? Not Just Yet . . .},
  author={Sarah Bridle and Ofer Lahav and Jeremiah P. Ostriker and Paul J. Steinhardt},
  journal={Science},
  year={2003},
  volume={299},
  pages={1532 - 1533}
}
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 standard cosmological model. However, [ Bridle et al .][1] argue in their Perspective that there remain some significant open issues regarding the basic history and composition of the Universe and uncertainties in some of the most important parameters. [1]: http://www.sciencemag.org/cgi/content/full/299… 

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References

SHOWING 1-7 OF 7 REFERENCES

Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant

We present spectral and photometric observations of 10 Type Ia supernovae (SNe Ia) in the redshift range 0.16 ≤ z ≤ 0.62. The luminosity distances of these objects are determined by methods that

Constraints on Ωm and σ8 from Weak Lensing in Red-Sequence Cluster Survey Fields

We have analyzed 53 deg2 of RC-band imaging data from the Red-Sequence Cluster Survey (RCS) and measured the excess correlations in the shapes of galaxies on scales out to ~1.°5. We separate the

A Cyclic Model of the Universe

A cosmological model in which the universe undergoes an endless sequence of cosmic epochs that begin with a "bang" and end in a “crunch" is proposed, which produces the homogeneity, flatness, and energy needed to begin the next cycle.

Measurements of Ω and Λ from 42 High-Redshift Supernovae

We report measurements of the mass density, ΩM, and cosmological-constant energy density, ΩΛ, of the universe based on the analysis of 42 type Ia supernovae discovered by the Supernova Cosmology

Molecular mechanisms of photosynthesis

This chapter discusses the organization and structure of Photosynthetic Systems, as well as the history and development of Photosynthesis, and the origins and evolution of photosynthesis.

Cosmological parameters from CMB and other data: A Monte Carlo approach

We present a fast Markov chain Monte Carlo exploration of cosmological parameter space. We perform a joint analysis of results from recent cosmic microwave background ~CMB! experiments and provide

Constraints on Omega_m and sigma_8 from weak lensing in RCS fields

We have analysed 53 square degrees of imaging data from the Red-Sequence Cluster Survey (RCS), and measured the excess correlations in the shapes of galaxies on scales out to ~1.5 degrees. We