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C. G. Hoopes (JHU)
There is evidence that the cosmic star-formation rate peaked in the redshift interval z=1-2, yet comparatively little is known about star-forming galaxies in this important epoch. This is primarily due to the difficulty in using dropout techniques with optical broadband filters to select galaxies in this range. The Galaxy Evolution Explorer (GALEX) provides far-ultraviolet (FUV; 1350-1800 Angstroms) and near-ultraviolet (NUV; 1800-2800 Angstroms) images which select galaxies at z=1 and 2, respectively, via the Lyman-dropout technique. We present initial results from an investigation of ultraviolet-selected galaxies in the 1 square degree region of the GALEX Deep Imaging Survey (DIS) that coincides with the Bootes region of the NOAO Deep Wide-Field Survey (NDWFS). The DIS provides photometry to a depth of 25 AB magnitudes, which complements the deep optical images of the NDWFS. We have further supplemented these data with deep U-band imaging, and spectroscopic follow-up observations of a subsample of z=1 and 2 candidates have recently been obtained. We use these data to investigate the star-formation and extinction properties of the population of UV-selected galaxies at z=1 and 2.
GALEX (Galaxy Evolution Explorer) is a NASA Small Explorer, launched in April 2003. We gratefully acknowledge NASA's support for construction, operation, and science analysis for the GALEX mission. The NDWFS is supported by NOAO, which is operated by AURA, Inc., under a cooperative agreement with the National Science Foundation.
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The author(s) of this abstract have provided an email address for comments about the abstract: choopes@pha.jhu.edu
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Bulletin of the American Astronomical Society, 36 #2
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