IAU00000
Presentation type requested: ORAL
EARLY RESULTS FROM THE GALAXY EVOLUTION EXPLORER (GALEX)
Chris Martin
CALTECH
We report on the first data and early results from the Galaxy Evolution Explorer (GALEX), a NASA Explorer Mission launched on April 28, with a nominal mission start of June 19. GALEX is performing the first space UV sky-survey, including imaging and grism surveys in two bands (1350-1750 Angstrom and 1750-2800 Angstrom). The surveys include an all-sky imaging survey (limit AB~20-21), a medium imaging survey of 1000 sq. deg (limit AB~23.5), a deep imaging survey of 100 square degrees (limit AB~25.5), and a nearby galaxy survey. Spectroscopic grism surveys (R=100-300) will be performed with various depths and sky coverage. Many targets overlap existing or planned surveys, including SDSS, DEEP, NOAO-DWS, VIRMOS, SWIRE, SINGS, SIRTF-GTO, Chandra, and HST/ACS. We will use the measured UV properties of local galaxies, along with corollary observations, to calibrate the UV-global star formation rate relationship in galaxies. We will apply this calibration to distant galaxies discovered in the deep imaging and spectroscopic surveys to map the history of star formation in the universe over the redshift range 0<z<2. We will use the data set, with supporting observations, to probe the starburst history of galaxies. The GALEX mission will include a Guest Investigator program for primary observations and supporting data analysis. This will support a wide variety of investigations made possible by the first UV sky survey.
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