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M. Seibert (CalTech), T. Heckman (JHU), S. Charlot (MPA), GALEX Science Team
It is known that starburst galaxies exhibit a correlation between their UV spectral slope (\beta; equivalent to UV color) and their infrared excess (ratio of Far-IR to Far-UV; IRX). This relationship indicates that dust surrounds starburst regions and can be modeled to provide an estimate of the UV extinction as a simple function of the UV color. The lack of a large, uniform, high quality sample of galaxies with both UV and FIR measurements has severely limited the attempts to determine if a similar UV-reddening law exists for normal star forming galaxies. The GALEX mission is conducting the first ever All-sky survey in the Near-UV (2200Å) and Far-UV (1550Å). We have obtained IRAS measurements for a sample of GALEX early mission data and present the preliminary results of a IRX-\beta relation. Although GALEX has only completed a small fraction of the planned survey, this sample is the largest ever assembled to investigate the IRX-\beta correlation.
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Bulletin of the American Astronomical Society, 35#5
© 2003. The American Astronomical Soceity.