NOAO >   Observing Info >   Approved Programs >   2002A-0233

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Proposal Information for 2002A-0233


PI: Timothy M. Heckman, Johns Hopkins University, heckman@pha.jhu.edu
Address: Bloomberg Center, Baltimore, MD 21218, USA

CoI: Chris Martin, Caltech
CoI: David Schiminovich, Caltech
CoI: Michael Rich, UCLA
CoI: Arjun Dey, NOAO
CoI: Buell Jannuzi, NOAO
CoI: Alex Szalay, Johns Hopkins University

Title: Star Formation & Galaxy Building in the `Middle Ages': z ~ 1 to 3

Abstract: The history of star-formation has now been documented back to z~5. While this is a remarkable accomplishment, much remains to be done. The data used to measure SFR(z) have been inhomogeneous at different redshifts, and the measurements have been exceptionally difficult from z ~ 1 to 2, at or near the peak in SFR(z). To address this, we propose to use the Mosaic Camera on the KPNO 4-m telescope to obtain deep U-band images of the ~ 1 square degree area within the NOAO Deep Wide Field Survey (NDWFS) that will be imaged to 26th magnitude in the near- and far-UV by NASA's Galaxy Evolution Explorer (GALEX). GALEX will detect ~10^5 star-forming galaxies in this field in the range z ~ 0 to 2. The combination of GALEX, NDWFS, and the requested U-band images will allow us to measure redshifts, UV luminosities, and star-formation rates for galaxies with z~ 1 to 3, using the same ``Lyman Break'' technique that has been so successful at higher redshift. Planned SIRTF near- and far-IR data for the same region will make it possible to robustly measure the effects of dust on UV-based estimates of the star-formation rate. The newly requested data will be of broad use to the community, and will be released along with NDWFS.


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