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Session 62 - Dark Matter in Large Scale Structures.
Oral session, Thursday, January 08
International Ballroom East,
In the last few years, there has been an explosion in the use of gravitational lensing to measure mass distributions in intermediate redshift clusters of galaxies. Both strong lensing (multiple images) and weak lensing (measures of average shear) studies have yielded information about the total mass and the mass profiles of dozens of clusters. Because lensing measures the surface mass density directly, while x-ray emission is proportional to N^2, the comparison of x-ray to lensing masses is an important diagnostic of the clumpiness of the distribution. I will review the recent results from gravitational lensing and compare with x-ray mass determinations and kinematical estimates (e.g. CNOC).
Program listing for Thursday