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Properties of luminous spheroids at redshifts z ~ 1 from Keck and HST

Published online by Cambridge University Press:  01 July 2007

David C. Koo
David C. Koo
Affiliation:
UCO/Lick Observatory, Department of Astronomy and Astrophysics, University of California, Santa Cruz, CA 95064, USA email: [email protected]
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Abstract

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Three new and still on-going surveys that combine the power of spectroscopy or adaptive optics from the Keck Telescopes with HST images are DEEP, AEGIS, and CATS. The advantages of each for the study of distant bulges are accompanied by a few highlights. We find that the vast fraction of luminous distant bulges appear very red, independent of the bulge luminosity, bulge fraction, disk color, and environment. Yet early-type galaxies appear to be relatively young at redshifts z ~ 1, are less numerous then, host many X-ray AGN's with some that are highly obscured, and have low but increasing dry-dry and dry-wet merger rates over time.

Keywords

galaxies: bulgesgalaxies: evolutiongalaxies: high-redshiftgalaxies: photometrygalaxies: interactionsgalaxies: kinematicssurveystechniques: high angular resolution
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S245: Formation and Evolution of Galaxy Bulges , July 2007 , pp. 379 - 384
Copyright
Copyright © International Astronomical Union 2008

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