DETERMINING THE THREE-DIMENSIONAL SHAPES OF GALAXY CLUSTERS

In this contribution, we illustrate that by combining lensing and X-ray surface brightness data the elongation of clusters along the line-of-sight can be estimated. The distribution of three dimensional shapes of the mass in clusters of galaxies could potentially place constraints on Ω and provide clues to the nature of dark matter. With the abundance of multi-wavelength data the prospects for mapping the three-dimensional shapes are promising.