This volume consists of invited talks and contributed papers presented at the NATO Advanced Study Institute "The Post Recombination Universe" which was held in Cambridge in the summer of 1987. There have, in recent years, been numerous meetings devoted to problems in observational cosmology. The attention given reflects the exciting rate of de velopment of the subject, and a survey of the proceedings from these symposia reveals that a great deal of emphasis has been given to consideration of the very early universe on the one hand, and to large scale structure in the universe at the present epoch on the other. The theme of this meeting was chosen to comple ment these efforts by focussing on the state of the universe at quite early times, but at those epochs which are still accessible to direct observations. The meet ing provided a broad coverage of the post recombination universe by drawing on experts from a wide variety of fields covering theory, background radiation fields and discrete sources at high redshift. Events in the moderately early universe will have left their mark in a great range of wavebands, from X-rays to the microwave region, and the evolution of the universe can be revealed by studies of the inter galactic medium, gravitational lensing and the abundance and clustering of high redshift sources. All of these subjects received much attention at the meeting, and the papers demonstrate the rich interplay between these areas in the rapidly expanding world of observational cosmology.

Proceedings of the NATO Advanced Study Institute, Cambridge, U.K., July 27-August 7, 1987

Inhalt
I Sources at High Redshift.- Protogalaxies.- The Search for High Redshift Quasars.- Cosmological Evolution of Extragalactic Sources.- The Evolution of Extragalactic X-ray Sources.- HII Galaxies.- The Redshift Cutoff for Steep-Spectrum Radiogalaxies.- Quasars Contributing to the Extragalactic X-ray Flux: the Deep X-ray Survey in Pavo.- The Milli-Jansky Radio Galaxies.- Cosmogonic Implications of the First Quasars.- II Background Radiation Fields.- Measurements of CBR Anisotropics at Intermediate Angular Scales.- Cosmological Implications of the Infrared Background Radiation.- Origin and Anisotropy of the Cosmic Submillimeter Background.- Non-Gaussian Statistics and the Microwave Background.- Cosmological Gravitational Waves.- The Infrared Background from Stars at High Redshift.- Large-Scale Microwave Background Anisotropics in Cosmological Models with Exotic Components.- Microwave Background Radiation Observations at the Owens Valley Radio Observatory.- Microwave Background Radiation Observations at the Owens Valley Radio Observatory: Analysis and Results.- On Measurements of the Zeldovich-Sunyaev Effect.- Prospects for Sunyaev-Zeldovich Astronomy.- The Constraints on Superconducting Strings.- Horizon-Size Cosmic Strings.- III Absorption Line Systems.- Metal-Rich Absorption Line Systems.- The Periodicity in the Redshift Distribution of Primordial Hydrogen Clouds.- IV Galaxy Clustering and Large-Scale Structure.- Quasar Clustering and Gravitational Lenses.- X-rays and the Large Scale Structure of the Universe.- Monte Carlo Simulations of Large-Scale Streaming Velocities.- A Test on the Gaussian Nature of Primeval Fluctuations.- Can Explosions Generate Filaments and Voids?.- Models for the Evolution of the Two-Point Correlation Function.- Some Possible Mechanisms for the Formation of Large Scale Structures in the Universe.- Evolution of Quasar Clustering.- From 2-D to 3-D by Maximum Entropy Method.- Cluster-Galaxy Cross-Correlations.- Cluster Correlations in Cold Dark Matter Scenarios.- Cosmic Strings and the Large-Scale Structure.- The 3-D Distribution of Abell Clusters.- Quasar Pairs, Clustering and its Evolution.- V Gravitational Lensing.- Gravitational Lenses.- Gravitational Micro-Lensing as a Clue to Quasar Structure.- Gravitational Lensing by Clusters of Galaxies.- Properties of Gravitational Lens Mappings.- VI Galaxy Formation Theory.- The Formation of Elliptical galaxies.- Self-Similar Inhomogeneous Cosmological models.- Cosmic Strings: A Problem or a Solution?.- Galaxy Formation with Neutrinos and Cosmic Strings.- Gauge Invariant Cosmological Perturbation Theory for Collisionless Scenarios.- Extending N-Body Methods with SPH.- Galaxy Formation in the Cold Dark Matter Cosmogony.- The Growth of Angular Momentum Near Density Peaks.- The Morphological Luminosity Function.