DR. SURHUD MORE

Galaxies live in gravitationally bound clumps of dark matter called halos. Therefore, the distribution of galaxies in the Universe traces the distribution of dark matter. Observations of galaxies can thus provide important information about the cosmological parameters. The speaker will present how a joint analysis of the clustering of galaxies and the galaxy-galaxy lensing signal can be used to probe the connection between galaxies and their dark matter halos, as well as the cosmological parameters. He will present constraints on the amount of matter ($\Omega_m$) in the Universe and the amplitude of primordial density fluctuations quantified by $\sigma_8$ from such an analysis using data from the recently completed Sloan Digital Sky Survey III BOSS galaxies. The joint clustering and lensing analysis is the first of its kind to be performed at a redshift as high as 0.53. He will briefly discuss SuMiRe, a planned survey using the prime focus at Subaru telescope and present how our analysis can be ported to further improve the cosmological constraints.