Weak lensing of CMB and cosmic shear as a probe of non-scalar perturbations

Toshiya Namikawa

December 14, 2012

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Abstract: Several cosmological observations in the last decade have successfully established a fundamental framework in cosmology. Taking seriously account of our current understanding and lack of our knowledge of the universe, the cosmology in the coming decade should focus on more advanced and fundamental issues. One of the powerful probe to tackle these fundamental issues is weak gravitational lensing; a deflection of photons emitted from, e.g., last scattering surface of CMB or galaxies. In this talk, I show what can we probe by measuring weak lensing signals of CMB and cosmic shear, especially focusing on odd-parity quantites, such as curl mode of deflection angle and B-mode shear.