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Published September 2007 | Published
Journal Article Open

The Cosmic Evolution Survey (COSMOS): Overview


The Cosmic Evolution Survey (COSMOS) is designed to probe the correlated evolution of galaxies, star formation, active galactic nuclei (AGNs), and dark matter (DM) with large-scale structure (LSS) over the redshift range z > 0.5-6. The survey includes multiwavelength imaging and spectroscopy from X-ray-to-radio wavelengths covering a 2 deg^2 area, including HST imaging. Given the very high sensitivity and resolution of these data sets, COSMOS also provides unprecedented samples of objects at high redshift with greatly reduced cosmic variance, compared to earlier surveys. Here we provide a brief overview of the survey strategy, the characteristics of the major COSMOS data sets, and a summary the science goals.

Additional Information

© 2007 American Astronomical Society. Print publication: Issue 1 (2007 September); received 2006 April 25; accepted for publication 2006 June 28. We gratefully acknowledge the contributions of the entire COSMOS collaboration consisting of more than 70 scientists. The HST COSMOS Treasury program was supported through NASA grant HST-GO-09822. The COSMOS Science meeting in 2005 May was supported in part by the NSF through grant OISE-0456439. Facilities: HST (ACS), HST (NICMOS), HST (WFPC2), Subaru (Scam), NRAO (VLA), XMM, GALEX, Spitzer (IRAC), Spitzer (MIPS), CFHT, UKIRT, CSO, IRAM (30m). Based on observations with the NASA/ESA Hubble Space Telescope, obtained at the Space Telescope Science Institute, which is operated by AURA, Inc., under NASA contract NAS 5-26555; also based on data collected at the Subaru Telescope, which is operated by the National Astronomical Observatory of Japan; the XMM-Newton, an ESA science mission with instruments and contributions directly funded by ESA Member States and NASA; the European Southern Observatory under Large Program 175.A-0839, Chile; Kitt Peak National Observatory, Cerro Tololo Inter-American Observatory, and the National Optical Astronomy Observatory, which are operated by the AURA, Inc., under cooperative agreement with the National Science Foundation; the National Radio Astronomy Observatory, which is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc.; and the Canada-France-Hawaii Telescope with MegaPrime/MegaCam operated as a joint project by the CFHT Corporation, CEA/DAPNIA, the NRC and CADC of Canada, the CNRS of France, TERAPIX, and the University of Hawaii.

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