Galaxies at Z > 3: star Formation, Metal Production and Clustering

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Scientific paper

The Lyman break technique now makes it possible to identify galaxies at high redshifts in a wholesale manner. I will review recent results of ground-based surveys which have extended the technique beyond z = 3. This new work has led to a revised picture of the star formation history of the universe compared to what was known from observations of the Hubble Deep Field alone. With the imminent arrival of state-of-the-art near-infrared spectrographs on large telescopes it will soon be possible to close in on the most important physical properties of these early galaxies, and in particular determine their masses and metallicities.

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