Invited talk at the Ringberg Workshop on Ultraluminous Galaxies: Monsters or Babies, held in the Ringberg Castle, Germany, September 20-26, 1998. Proceedings to be published by Kluwer. (astro-ph/9902107)


UV EMISSION AND DUST PROPERTIES OF HIGH REDSHIFT GALAXIES

D. Calzetti

Space Telescope Science Institute
3700 San Martin Dr., Baltimore, MD 21218, U.S.A.


ABSTRACT. The high-redshift (z > 2) galaxies discovered over the last few years with the Lyman-break technique represent, in number density, a major fraction of the galaxies known in the Local Universe. Thus, understanding the properties and the nature of these high-redshift systems is instrumental to our understanding of the cosmic evolution of galaxies and their stellar content. I briefly review the observed characteristics of the Lyman-break galaxies, relate these galaxies to their most likely low-redshift counterparts, and discuss the implications of dust obscuration on the global properties of the Lyman-break population. Finally, the observational properties of the high-redshift population are set in the framework of a simple evolutionary model for the stellar, metal and dust content of galaxies, to derive the intrinsic star formation history of the Universe.


Table of Contents

INTRODUCTION

THE LYMAN-BREAK GALAXIES AND THEIR LOW-REDSHIFT COUNTERPARTS

DUST REDDENING AND OBSCURATION IN LOCAL STARBURSTS AND IN LYMAN-BREAK GALAXIES

THE EVOLUTION OF THE STELLAR, METAL, AND DUST CONTENT OF GALAXIES

THE INTRINSIC STAR FORMATION HISTORY OF THE UNIVERSE AND THE SCUBA GALAXIES

REFERENCES

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