Statistical anisotropies in temperature and polarization fluctuations from a scale-dependent trispectrum

@article{Adhikari2018StatisticalAI,
  title={Statistical anisotropies in temperature and polarization fluctuations from a scale-dependent trispectrum},
  author={S. Adhikari and A. Deutsch and S. Shandera},
  journal={Physical Review D},
  year={2018},
  volume={98},
  pages={023520}
}
  • S. Adhikari, A. Deutsch, S. Shandera
  • Published 2018
  • Physics
  • Physical Review D
  • We study statistical anisotropies generated in the observed two-point function of the cosmic microwave background (CMB) fluctuations if the primordial statistics are non-Gaussian. Focusing on the dipole modulations of the anisotropies, we find that the hemispherical power asymmetry observed in the CMB temperature fluctuations can be modeled by a local-type trispectrum with amplitude $\tau_{\rm NL}(k_p=0.05~{\rm Mpc}^{-1}) \approx 2 \times 10^4$ and a large red tilt $n\approx -0.68$. We… CONTINUE READING
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