Dipole Modulation in Tensor Modes: Signatures in CMB Polarization

Abstract

In this work we consider a dipole asymmetry in tensor modes and study the effects of this asymmetry on the angular power spectra of CMB. We derive analytical expressions for the $C_l^{TT}$ and $C_l^{BB}$ in the presence of such dipole modulation in tensor modes for $l<100$. We also discuss on the amplitude of modulation term and show that the $C_l^{BB}$ is considerably modified due to this term.

12 pages, 5 figures

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