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J.D. Rhodes (JPL), COSMOS Lensing Team
Weak gravitational lensing is an excellent probe of the amount and distribution of dark matter in the Universe. The COSMOS field represents a unique combination of depth, resolution, and area which allows for detailed maps of the dark matter distribution to be derived via weak lensing of background galaxies. The availability of photometric redshifts for the lensed galaxies allows us to determine the approximate redshifts of the dark matter structures and thus produce rudimentary three dimensional mass maps. We present dark matter maps of the COSMOS field and compare these to maps of the visible and X-Ray light in this field. We also detail how we will be able to study galaxy properties as a function of mass environment using these mass maps.
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Bulletin of the American Astronomical Society, 37 #4
© 2005. The American Astronomical Soceity.