MR. SUVODIP MUKHERJEE

Recent measurements by WMAP and Planck have confirmed more than 3s departure from statistical isotropy (SI) in the temperature field of cosmic microwave background (CMB) at large scales, which is popularly known as Hemispherical Asymmetry. Such an anomalous signal is beyond the standard LCDM cosmological model and can lead to important cosmological consequences. The presence of SI violation on scalar perturbations also affect the large scale matter distribution of the Universe and should be measurable from future missions. Presence of hemispherical asymmetry at large scales in the matter distribution gives rise to non-zero signal at small scales in the B mode polarization of CMB due to weak lensing. The property of this phenomena to translate the effects of hemispherical asymmetry from large scales in matter distribution to small scales in B modes makes it a clinching window to measure SI violation. Future CMB missions can access this and can put constraints on hemispherical asymmetry in the matter distribution.