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.
Categories: hep-th astro-ph.CO