Appeared in "Critical Dialogues in Cosmology", ed. N. Turok, 1997.

MEASURING OMEGA

Avishai Dekel 1, David Burstein 2, Simon D.M. White 3


1 The Hebrew University of Jerusalem
2 Arizona State University, Tempe
3 Max-Planck-Institut fuer Astrophysik, Garching

Table of Contents

INTRODUCTION

GLOBAL MEASURES
Occam's Razor
Classical Tests of Geometry
Number Count of Quasar Lensing
Microwave Background Acoustic Peaks
The Age of the Universe

VIRIALIZED OBJECTS: GALAXIES AND CLUSTERS
Mass to Light Ratio
Baryon Fraction and Nucleosynthesis
Cosmic Virial Theorem
Local Group Dynamics

LARGE-SCALE FLUCTUATIONS; COSMIC FLOWS
Measured Peculiar Velocities
Redshift Distortions
Velocity versus Density
Cluster Abundance and Correlations

FLUCTUATION GROWTH RATE
Cluster Morphology
The Epoch of Galaxy Formation
Present Structure versus Fluctuations in the CMB

CONCLUSION

REFERENCES

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