The X-Ray Universe at High Redshift

Physics

Scientific paper

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Chandra Proposal Id #03900462

Scientific paper

Deep optical surveys show a population of star-forming galaxies at high z. These are probably in the process of formation, evolving into local ellipticals and spirals. X-ray observations can determine the influence of AGN activity on their evolution, and gives an independent measure of the star formation rate. We propose a 200ks observation of the Groth-Westphal Survey area to determine the X-ray emission and AGN content of galaxies out to z=3. This is a very intensively studied region of the sky; notably for our purposes it contains over 200 spectroscopically confirmed Lyman Break Galaxies. It is targeted for numerous future deep surveys (e.g. SIRTF, GALEX) and a huge spectroscopic survey by the DEEP consortium, offering enormous archival potential beyond our own exploitation of the data.

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