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B0219
Title: The challenge of weak lensing Authors:  Thomas Kitching - UCL (United Kingdom) [presenting]
Abstract: Weak lensing distorts observed galaxy shapes by changing their size and ellipticity at a level of one part in a thousand. By measuring these small distortions statistically and in three dimensions both the geometry of the Universe and the growth of structure can be inferred. Several ground-breaking surveys are being planned that will map the majority of the sky to measure this effect, for example the ESA Euclid mission. We will review the state-of-the-art in image analysis inferring ellipticities and sizes from very noisy date; cosmological parameter inference using three-dimensional spherical harmonic analyses; and simulations using large-scale n-body and hydrodynamical methods. We will focus on the outstanding challenges in this field, and motivate the need for a close collaboration between the cosmology, computational and statistical communities.