AAS 204th Meeting, June 2004
Session 43 Galaxy Surveys and Galaxy Clusters
Poster, Tuesday, June 1, 2004, 10:00am-7:00pm, Ballroom

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[43.11] A Bolocam Survey of the Central Region of the COSMOS Field

J. Aguirre (U. Colorado), Bolocam-COSMOS Collaboration

The Cosmic Evolution Survey (COSMOS) is a large area multiwavelength survey designed to understand the interplay between large scale structure and dark matter evolution and the formation of galaxies and AGNs. It is anchored by the unprecedented 640-orbit COSMOS 2003 Cycle-12 HST-ACS survey, and the field (centered at 10h00m28.6s, 02d12m21s) will also be covered by the VLA, XMM/Newton, Subaru, NOAO, and GALEX, with follow-up anticipated with Spitzer and Keck.

We present preliminary results of a Bolocam survey at 1.1 mm made in Februrary 2004 of the central 1000 arcmin2 of the COSMOS field. Bolocam is a millimeter-wavelength bolometer-array camera designed for mapping large fields. The principal objects expected to be detected in the Bolocam field are submillimeter galaxies: dusty, high-redshift galaxies with extreme luminosities (>1012 Lsolar) and implied star formation rates (100-1000 Msolar per year). d Characterizing submillimeter galaxies is crucial to understanding galaxy formation and evolution. Due to the strong negative K-correction at 1.1 mm, Bolocam's detection sensitivity is approximately uniform for galaxies of a given intrinsic luminosity for redshifts 1 < z < 10. The guaranteed multi-waveband coverage of the COSMOS field will allow Bolocam detected sources to be identified and their astrophysics thoroughly investigated.

We present diagnostics of the data, noise estimates, and Monte Carlo simulations to characterize the survey parameters. Because of the wide area and relatively shallow depth, detections are primarily expected at the bright end of the luminosity function.

This research is funded in part by grants from the NSF (AST-0206158, AST-0098737 and AST-0205937 ) and NASA (NGT5-50384).

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